Extended Service Life Research Articles

Axial and bending very high cycle fatigue of completion string

Preventing or mitigating very high cycle fatigue (VHCF) damage and failure of completion string is essential for ensuring their long-term stable operation. Therefore, a comprehensive understanding of the string's fatigue performance in tension, compression, and bending over an extended service life is necessary. This study investigated the evolution, microscopic mechanisms, fracture behavior, and life prediction of VHCF damage in completion string under axial and bending conditions. It was found that the intragranular twin structures on the critical interface of VHCF source directly participate in lattice reconstruction, enhancing the grain's strain coordination ability, and increasing the proportion of facet area on the fatigue fracture surface. Based on the fracture characteristics of VHCF, the Mayer empirical formula was improved, and a novel convolutional neural network (CNN) based VHCF life prediction model was proposed. Utilizing the CNN's powerful fracture feature extraction and nonlinear modeling capabilities, the VHCF fatigue life prediction accuracy was significantly enhanced, with prediction errors all within 2 times the experimental results' error range. Based on the axial and bending VHCF fracture mechanisms of completion string and CNN, a more advanced method for predicting axial and bending VHCF life is provided, offering theoretical supports for the engineering safety service and life assessment of completion string.

Mechanical properties and LTE of different joint coupling members in PCP: Experimental and simulation calculations

Precast concrete pavements (PCPs) have gained increasing popularity due to their numerous benefits, including faster construction, improved quality, and extended service life. However, PCP panels are often prone to damage at the dowel bar-concrete interface, which adversely affects their load transfer capacity and long-term performance. Therefore, it is crucial to investigate the joint coupling of PCP. In this study, static and cyclic loading tests were conducted on the representative joint coupling members of the rod, plate, and coupled types, namely, dowel bar, Uretek glass fiber-reinforced polymer (GFRP), and cotter. A comparative analysis was performed on their deflections, earth pressures, and strains. In addition, a finite element model was developed to analyze and discuss the internal stresses and changes in the structural parameters of the joint coupling members. The results showed that the cotter can bear the greatest load with the least maximum principal stress at the concrete interface, making it a more suitable choice for poor foundation conditions and ensuring better long-term performance. The Uretek GFRP demonstrated higher load transfer efficiency (LTE) and a smaller maximum principal stress at the concrete interface, thereby requiring a higher foundation level for heavy loads but ensuring better long-term performance. Although the dowel bar exhibits a high LTE, the concrete interface encounters the highest stress, necessitating greater foundation requirements. These findings provide a reliable scientific reference and serve as a test basis for selecting appropriate joint coupling members in PCP.

The Effect of Curing Conditions on the Service Life of 3D Printed Concrete Formwork.

Complex concrete elements are typically produced with lost formwork made out of timber or plastic. After usage, these timber or plastic panels are disposed of. This makes complex lost formwork a polluting and high-cost-inducing aspect of concrete construction. A possible solution for this problem could be 3D printing of concrete. This high degree of freedom construction process could easily be used to produce complex formwork. As the formwork stays in place, it has a function during and after the hardening of the inner concrete. Before hardening, the formwork keeps the fresh concrete in place. After hardening, the printed formwork takes the function of a concrete cover. The concrete cover protects the steel reinforcement against aggressive environmental substances such as chlorides and carbon dioxide. To properly execute this function, the printed material and the transition between printed material and inner concrete need to perform at least as well as the inner material. This experimental research investigates the usability of a 3D printed concrete mixture as a concrete cover in a combined concrete structure. The effect of the curing condition as well as two different surface finishing techniques of the printed formwork are taken into account. The effect of the different parameters is compared based on existing service life models. Results indicate that proper curing of the printed formwork is of key importance in order to obtain significant resistance against carbonation- and chloride-induced corrosion. Adjusting the nozzle with side trowels improves the resistance of the printed material against chloride intrusion and carbonation but has only a limited effect on the service life extension.

Service life extension of strategic bridges

This article reports the process that allowed to check the condition of a steel railway bridge having a strategic position within the network. The framework representing the actions needed for the service life extension of the bridge is first described, then the conducted inspections are illustrated, together with the developed numerical analyses and the conception of specific tests on site. The conclusion, downstream of all these analyses and with the comparison of the real-life experiments, was to allow a limited extension of the useful life of the bridge, even with some reductions in the safety factor, respecting a reduction in the speed of railway trains and prescribing continuous monitoring of the bridge. In this context, all the test evaluations, combined with the surveillance/monitoring, and joined with an important numerical modelling activity, lead to the concept of “structural augmentation” of the bridge for service life extension purposes. The specific case of the examined bridge is supposed to be an example of good practice useful for infrastructure authorities.

Efficient purification of high-salt rural groundwater in the areas along the Yellow River in Henan Province, China, by hollow fiber membrane distillation process

The vast rural drinking water sources along the Yellow River basin in Henan Province mainly come from the local high-salinity groundwater, which cannot be directly drunk. Zeolitic imidazolate framework-71/polyvinylidene fluoride hollow fiber composite membrane was applied to treat rural groundwater through membrane distillation technology. The variations of water quality parameters from 12 different rural regions after membrane distillation treatment were well analyzed and compared. Membrane separation performance for water samples from different regions during the membrane distillation process was investigated, including water flux and salt rejection. During a continuous 24-h membrane distillation process for the treatment of these water samples, hollow fiber membrane exhibits high solute retention rates (>99%) for salt ions, suspended solids and total dissolved solids, which are within the limits of national standards (GB 5749-2006), meanwhile membrane permeation water flux can remain stable. After the acid-cleaning for 180 min, all hollow fiber membranes can recover water flux well with a flux recovery rate above 98%. Even if the concentration ratio continued to increase, the water production rate of membrane distillation was basically maintained between 50% and 60%, which was obviously higher than the 30% of the reverse osmosis process. The economic analysis confirmed that the water production cost varied between US$0.45 and US$0.29/m3. With the extension of membrane service life, the specific membrane cost decreased rapidly in the first 6 years and then leveled off. The proposed vacuum membrane distillation process proved to be a promising water purification method for treating rural high-salinity groundwater.

3D printed denture base material: The effect of incorporating TiO2 nanoparticles and artificial ageing on the physical and mechanical properties

ObjectivesTo evaluate the physical and mechanical properties of three-dimensional (3D) printed denture base resin incorporating TiO2 nanoparticles (NPs), subjected to a physical ageing process. MethodsAcrylic denture base samples were prepared by a Stereolithography (SLA) 3D printing technique reinforced with different concentrations (0.10, 0.25, 0.50, and 0.75) of silanated TiO2 NPs. The resulting nanocomposite materials were characterized in terms of degree of conversion (DC), and sorption/solubility flexural strength, impact strength, Vickers hardness and Martens hardness and compared with unmodified resin and conventional heat-cured (HC) material. The nanocomposites were reassessed after subjecting them to ageing in artificial saliva. A fractured surface was studied under a scanning electron microscope (SEM). ResultsThe addition of TiO2 NPs into 3D-printed resin significantly improved flexural strength/modulus, impact strength, Vickers hardness, and DC, while also slightly enhancing Martens hardness compared to the unmodified resin. Sorption values did not show any improvements, while solubility was reduced significantly. The addition of 0.10 wt% NPs provided the highest performance amongst the other concentrations, and 0.75 wt% NPs showed the lowest. Although ageing degraded the materials’ performance to a certain extent, the trends remained the same. SEM images showed a homogenous distribution of the NPs at lower concentrations (0.10 and 0.25 wt%) but revealed agglomeration of the NPs with the higher concentrations (0.50 and 0.75 wt%). SignificanceThe outcomes of this study suggested that the incorporation of TiO2 NPs (0.10 wt%) into 3D-printed denture base material showed superior performance compared to the unmodified 3D-printed resin even after ageing in artificial saliva. The nanocomposite has the potential to extend service life of denture bases in future clinical use.

Synergistic energy system [Sm3+-Eu3+-Tm3+]:CsPbI2.4Br0.6 designing and thermal optimization for photovoltaic and electrical applications

Current work, for the first time elucidates the fabrication and energy applications of the novel perovskite hetero-system formed by the ternary lanthanide doping of CsPbI2.4Br0.6 leading to formation of [Sm3+-Eu3+-Tm3+]:CsPbI2.4Br0.6 (SET:CPVSK). SET:PVSK was tailored for the band gap spanning over the range of 1.59–1.66 eV over the course of 28 days, exhibiting excellent stability. With the cubic crystalline geometry, the spin coated thin films expressed maximum coverage and profound binding to substrate. As a perovskite light absorber, SET:CVSK based solar cell gained an efficiency of 17 % with the 68.92 % of fill factor and an expanded open circuit voltage (Voc) of 1.08 V. As an electro-catalyst, SET:CPVSK expressed moderate oxygen generation. While it demonstrated magnanimous pure hydrogen generation showing impressively minimal overpotential and Tafel slope value of 142 mV and 122.7 mV dec−1, respectively. With an extended service life in the electrolyte medium, SET:CPVSK adorned nickel foam electrode was marked by superior unit capacity of 661.24 mAH g−1 while the equivalent series resistance (Rs) i.e. 0.67 Ω, which shows the minimal resistance and facilitated diffusion of ions.

Investigating the impact of manufacturing conditions on crack growth rate in nitrile butadiene rubber for enhanced service life – Part 01

Extended service life of components is playing an increasingly important role in society and economy. Accordingly, this also applies to elastomeric materials, which are used for example for tires, seals, and hoses. These are often exposed to cyclic loading, with crack initiation and growth playing a decisive role. Corresponding phenomena have been investigated for many years and are still not fully understood. For the fatigue behavior, the crosslinking state of the material is of particular importance. This is accompanied by various production parameters, such as processing temperature and curing time, which have been of little importance in research to date. For this reason, plain strain test specimens out of nitrile butadiene rubber (NBR) were produced by injection molding at different mold temperatures and crosslinking times in the present work. With the aid of these, the crack growth rate at different crosslinking states under cyclic loading was investigated. It has been shown that a longer crosslinking time toward fully cured specimens results in a 20% reduction in dissipated energy, with a corresponding increase of the crack growth rate by the factor of 100. Furthermore, a 20 K increase in mold temperature during manufacturing of fully cured specimens leads to a four times slower crack growth.

COMPOSITE METAL ALLOY-BASED CUTTING TOOL FOR HÖRLLER INDUSTRIAL PAPER CUTTING

The Hörller industrial paper cutting requires tools of high precision and durability to meet the needs of the printing and packaging industry. This article covers the development of an innovative cutting tool based on a composite metal alloy, designed to address the specific challenges of this process. The main objective of this study is to design and manufacture a cutting tool that is able to meet the demands of industrial paper cutting type Hörller, providing high efficiency, quality and extended service life. The development process of the cutting tool involved the precise definition of the geometry, the careful selection of the composite alloy material, the application of heat treatment and specialized sharpening techniques. Detailed tests were conducted to evaluate the tool's performance under industrial conditions. The results demonstrate that the cutting tool based on the composite metal alloy provides a remarkable efficiency in the cutting of Hörller-type paper, significantly surpassing conventional alternatives. In addition, its durability has been proven in long periods of industrial operation, minimizing the need for maintenance. This study contributes to the advancement of industrial cutting tool technology, offering a robust and effective solution for Hörller-type paper cutting. The developed tool represents a milestone in the optimization of the cutting process, promoting greater productivity and quality in the printing and packaging industry.

Optimization on hardening process parameters of alumnium alloy 7075 based composites using gra approach

Aluminum Metal Matrix Composites (AMMCs) play a vital role in various industries, including aerospace, aviation, maritime, transportation, and automotive, owing to their remarkable mechanical strength, resistance to corrosion, and tribological performance. The age-hardening process for AA7075-based Metal Matrix Composites is essential to meet specific performance requirements, improve material properties (enhancing mechanical properties, tailoring material performance, improving wear resistance, reducing weight, enhancing corrosion resistance, extending service life), and enhancing the overall suitability of these materials for a wide range of demanding applications. The objective of this study is to improve the mechanical and tribological characteristics of AA7075-based composites by utilizing the age-hardening process, rather than introducing additional reinforcements to the base material. Aluminium Alloy 7075 (AA7075) is selected as the matrix material due to its significant need for improvement in mechanical, corrosion, and tribological properties. Nano zirconium dioxide (ZrO2) is chosen as the reinforcement to meet the property requirements of AA7075 for various applications The composites comprising AA7075 alloy and varying weight percentages of ZrO2 (x = 0, 5, 10, 15, and 20) are fabricated using the stir casting method. The fabricated composites are subjected to tensile strength and density tests to determine the optimal combination of AA7075-based composites by employing the Archimedes principle and a Universal Testing Machine, respectively. The manufactured AA7075-based composites were subjected to EDAX and SEM tests to determine the wt% presence of elements of reinforcement and matrix material by employing the S 3000 - HITACHI model. The stir-cast AA7075-based composites were further subjected to hardening under different conditions to enhance their required properties. Age hardening was performed with the help of a Muffle furnace. The input parameters for hardening were age-hardening temperature (200, 300, and 300 °C), hardening duration (90, 180, and 270 min), and cooling environments (Furnace, water, and atmosphere). The chosen response parameters were micro hardness and wear loss. The microhardness and wear resistance of these composites were assessed using a Vickers hardness tester and a Pin-on-Disc testing apparatus. The optimization was carried out using Grey Relational Analysis (GRA). The confirmation test was conducted to determine density, Ultimate Tensile Strength (UTS), micro hardness, and wear loss. The AA7075/15 wt% ZrO2 composite exhibited a uniform distribution of zirconium dioxide in the AA7075 matrix material among the other manufactured composites. The AA7075/15 wt% ZrO2 exhibited higher density of 2.889 g cm−13 and UTS of 316 MPa than other combinations of AA7075 composite materials. Increasing the heating temperature and duration enhanced the micro hardness and wear resistance. Higher micro hardness and wear resistance were obtained with furnace cooling compared to other cooling environments. The optimized age-hardening process parameters are hardening temperature (400 °C), hardening duration (270 min), and cooling environment (Furnace cooling). The enhanced mechanical and tribological properties result from precipitate formation and density enhancement. The confirmation test for the combination specimen yielded higher density, UTS, micro hardness, and lower wear loss values, which are 2.896 g/cm3, 325 MPa, 138 HV, and 27 mg, respectively.

Heat transfer enhancement and pressure loss analysis of hydrogen-fueled microcombustor with slinky projection shape channel for micro-thermophotovoltaic system

Micro thermophotovoltaic (MTPV) system, as a type of micro-combustion power system, possesses several advantages, including higher energy density, sustained and stable energy output, and significantly extended service life. The energy conversion performance of the MTPV system is known to be closely correlated with the thermal performance of the microcombustor. This study proposes a unique microcombustor for the MTPV system with a slinky projection form channel. The influence of the amplitude of the slinky projection, the slinky projection fins number, and the basic oscillating channel radius on the external wall temperature, temperature uniformity, and pressure loss are investigated by adopting the detailed hydrogen/air reaction mechanism with 3-D numerical models. The results show that the increase of the slinky projection amplitude and the slinky projection fins number can improve the external wall temperature. Compared to the traditional microcombustor, the average external wall temperatures of the microcombustor with a slinky projection amplitude of 0.4 mm are 31.6 K lower at an input velocity of 5 m/s. Additionally, when the input mixture velocity is 5 m/s, the average outer wall temperature improves by 29.4 K as the number of slinky projection fins grows from 10 to 42, and the pressure drop increases by 1.4 times. Furthermore, the basic oscillating channel radius is suggested to be 1.5 mm. In summary, this research provides a valuable method for enhancing the energy production of the MTPV system.

Preparation and characterization of polyurethane-modified asphalt containing dynamic covalent bonds

Self-healing behavior of binder has important potential for promoting low-carbon service and extending service life of asphalt pavement. A novel self-healing polyurethane modified asphalt with dynamic covalent bonds was prepared in this work. The chemical structure, thermal-oxygen stability, rheological properties, fatigue properties and self-healing capability of polyurethane modified asphalt with dynamic covalent bonds were systemically investigated through Fourier infrared spectrum test, thermal gravimetric test, dynamic shear rheology test, linear amplitude sweep(LAS) test and multiple fatigue-healing-fatigue test. The result indicates disulfide dynamic covalent bond and oxime urethane dynamic covalent bond were successfully introduced into polyurethane cross-linking structure in asphalt, and the thermal-oxygen stability of asphalt has a significant increase after modification under the environmental conditions of construction and service. Rheological properties analysis suggests the introduction of dynamic covalent bonds is beneficial to improve the low-temperature toughness of polyurethane modified asphalt, and enhances its low-temperature cracking resistance. LAS analysis indicates the fatigue life of polyurethane modified asphalt can also be lengthened by over 70% at different strain levels(1.5%, 2.5% and 5%) with the introduction of dynamic covalent bonds, which is attributed to the excellent conformation adjustment ability and stress dissipation ability of dynamic cross-linking structure in asphalt. The multiple fatigue-healing-fatigue test shows the self-healing capability of polyurethane modified asphalt has an improvement with the introduction of dynamic covalent bonds, especially at the later stage with serious fatigue damage, and oxime urethane dynamic covalent bond shows the better contribution effect as compared with disulfide bond. This is due to the reversible fracture-rearrangement characteristics of dynamic covalent bonds. This work provides a new idea for improving the self-healing capacity and rheological properties of binder, reducing the frequency of pavement maintenance and extending the pavement service life.

Effects and mechanisms of capric acid/silica capsule on water absorption reduction of cement paste

Inspired by the structure design on biomaterials for drug delivery, the encapsulation of hydrophobic capric acid (CA) core with a hydrophilic silica shell was proposed and demonstrated in a cement paste system for improving the resistance to water absorption. Firstly the fabrication of CA/silica capsule by interfacial polymerization reaction was reported. Subsequently, the effects of CA/silica capsule and mono-doped CA-hollow silica as hydrophobic admixtures on the compressive strength, water absorption, hydration process and pore structure of 28-day cement pastes were studied. Compared with the mono-doped one, the cement paste incorporated with the capsule exhibited an increased compressive strength and hydrophobicity with reduced water absorption. The increment in the compressive strength and the resistance to water absorption of capsule/cement paste was further ascribed to the improved dispersion and possible sustained release of CA/silica capsule in water, resulting in the improved hydration degree with refined pore structures and the hydrophobicity of the cement paste matrix. The study based on prepared capsule materials suggested a simple but effective approach to the fabrication of hydrophobic cement-based materials with reduced water absorption and extended service life.

Laboratory proportion design and performance evaluation of Fiber-Reinforced rubber asphalt chip seal based on multiple properties enhancement

Chip seal is an effective preventive maintenance technology for the pavement distress repair and pavement service life extension. Adding fiber or rubber powder alone has been shown to improve chip seal performance. However, the full potential of chip seal could not be attained by utilizing only fiber or rubber powder singularly. In this study, a fiber-reinforced rubber asphalt chip seal was prepared and evaluated based on multiple properties enhancement. Analysis of Variance (ANOVA) was conducted to assess the level of significant influence of rubber powder content and shearing time on the results of the penetration, softening point, ductility, and elastic recovery tests. The optimal process parameters for rubber asphalt were further analyzed and determined based on the ANOVA results. Bending beam rheometer (BBR) and rotational viscosity tests were executed to evaluate the low-temperature crack resistance and workability of the rubber asphalt. Cover, sweep, 45-degree skew shear and texture depth tests were performed to identify the optimum proportion of fiber-reinforced rubber asphalt chip seal. Tensile, temperature stability, water stability and three-point bending tests were conducted to evaluate chip seal performance. Cost analysis for mature preventive maintenance technology was carried out to evaluate equivalent annual costs. The results show that essential parameters for preparing rubber asphalt were the rubber powder content of 22.5% and the shearing time of 60 min. Moreover, the optimum proportion of fiber-reinforced rubber asphalt chip seal was determined to be 9.55 kg/m2 of aggregates, 2.3 kg/m2 of rubber asphalt, and 80 g/m2 of fiber. This study also confirmed that the fiber-reinforced rubber asphalt chip seal outperformed the rubber asphalt chip seal in terms of crack resistance, skid resistance, bonding performance, temperature stability, water stability and fatigue resistance. Combined with cost analysis, it was found that the fiber-reinforced rubber asphalt chip seal was a type of cost-effective preventive maintenance technology.

Research on pulse laser cleaning and rust removal technology in power systems

In this paper, pulse laser cleaning and angle grinder polishing were used to clean the surface rust of carbon steel, and the cleaning effects of different cleaning methods for carbon steel surface rust were studied. The change of the micro-region morphology and element composition of the cleaned surface was analyzed. Comparative experiments were conducted on the corrosion resistance and paint anticorrosion ability of cleaned metal surfaces. Through comparison and analysis, the use of laser cleaning technology can improve the surface cleanliness and corrosion resistance of metals, reduce maintenance times, and extend service life. Laser cleaning machines with a power of 100 W or above can effectively perform precision cleaning and can be widely promoted in the field of power systems.

Seismic performance of RC bridge piers reinforced through FRCM confinement

AbstractCorrosion of reinforced concrete (RC) structures is one of the main issues concerning existing buildings and especially of infrastructures. Corrosion phenomena, that is induced mainly by carbonatation and by high chlorides concentration, can significantly affect the performance of existing structures. In particular, the seismic performance can be significantly affected. Loss of transversal reinforcement in RC elements can reduce the concrete ductility while corrosion affecting bending reinforcement reduces the lateral load‐bearing capacity of RC elements. To enhance the performance of corroded elements and extend service life of deteriorated structures confinement is one of the most effective and commonly used techniques. This paper investigates the deterioration of the seismic performance of a RC bridge affected by corrosion and retrofitted through FRCM confinement. Different deterioration and retrofitting scenarios are combined and seismic fragility curves are computed for each case. Finally, time‐variant seismic reliability profiles are used to evaluate the best retrofitting scenario and intervention time to maximize reliability gains.

Data based reliability and risk based assessment for service life extension of structures

AbstractOne very important contribution to improving the sustainability of existing structures is to extend their service life. This also makes a valuable contribution to resource conservation. Therefore, the assessment and the required safety level of an existing structure are of particular importance. This is one of two contributions which together summarize the past, current and developing approaches to extending service life while ensuring safety. Herein it is presented the reasons why many existing structures no longer meet structural safety requirements. Both the loadbearing capacity and the usability must be guaranteed over a certain period of time at or above a certain safety level. It is examined how these, and their future development, can be reliably assessed by collecting and analysing key data and how this can be used to extend the service life of structures.

Life cycle management for service life extension of structures

AbstractA very important task to improve the sustainability of existing structures is to extend their service life especially in terms of resource conservation and sustainability. Therefore, the assessment and the required safety level of an existing structure are of particular importance (condition monitoring). This contribution focusses on how data from established inspection and monitoring approaches are essential and examines the more advanced, additional approaches currently under review. Both the load‐bearing capacity and the serviceability must be guaranteed over a certain period of time at or above the required safety level. The serviceability of a structure can be measured by performance indicators. It is examined how the definition and measurement of performance indicators in conjunction with a well‐designed life cycle management action can be used to extend the service life while ensuring safety levels.

Refined evaluation methods for preventive maintenance of project-level asphalt pavement based on confusion-regression model

Accurate evaluation of the performance of airport pavement can help managers make scientific and systematic preventive maintenance (PM) decisions, ensuring pavement safety and extending service life. To this end, firstly, this paper sorted out the pavement performance evaluation index system, based on which a multi-dimensional evaluation system for PM was proposed, including control indexes, macroscopic indexes, and microscopic indexes. Then, the pavement decay model based on the pavement condition index (PCI) was developed, and the regression model between PCI and International roughness index (IRI) and friction coefficient (μ) was established. Finally, by converting the PM decisions for project-level pavement into a binary classification problem in machine learning, the optimal maintenance thresholds and intervals for PM of each index were determined using receiver operating characteristic (ROC) curve and Kolmogorov-Smirnov (K-S) curve. The optimal threshold represents the threshold when the index can separate the binary classification problem (PM decisions) with maximum probability. Based on confusion-regression model, the pavement performance can be evaluated more comprehensively, and the timing of PM can be accurately determined. The model helps airport managers develop accurate PM plans to address future maintenance needs.

Solid particle erosion evaluation of automotive paint coatings under the influence of artificial weathering

Solid particle erosion (SPE) is one of the most critical tribological problems causing damage to automotive paint coatings. The correct characterization of SPE and resistance against it makes the possible extended service life of the coating, increasing the resale value of cars. Car manufacturers and paint industries have developed new techniques to apply coatings and coatings that improve the initial and long-term appearance, scratch performance, and durability of coatings. Several works have focused on studying the degradation and performance of paint coatings. However, there needs to be more understanding of wear progress under different environmental degradation conditions. This study investigates the mechanisms and resistance of erosive wear of actual automotive paint coatings before and after exposure to an accelerated weathering process. Steel substrate panels with a typical paint coating system were exposed to weathering degradation by UV and immersion in an artificial acid rain solution. The chemical changes induced in the coatings were analyzed by FT-IR spectroscopy. Then erosive tests were carried out using silica sand particles at two different angles of incidence (30° and 90°) and temperatures (25 °C and 60 °C) for both samples (unexposed and weathering conditions). The SPE rate was determined for each coating by mass loss estimation using an analytical balance; meanwhile, wear mechanisms were analyzed in detail by SEM. The results showed decreased SPE resistance promoted by chemical changes in samples exposed to both weathering processes.