Temperature Thermal Oxidation Research Articles

Ambient Stability of Sodium-Doped Copper Oxide Obtained through Thermal Oxidation.

The ambient stability of copper oxide layers produced through thermal oxidation is a critical factor for their application in advanced photovoltaic devices. This study investigates the long-term stability of thermally grown sodium-doped copper oxides fabricated at 300 °C, 500 °C, and 700 °C. The structural, optical, and electronic properties of these oxide layers were examined after a 30-day period to understand how thermal oxidation temperature and sodium doping influence the durability and properties of copper oxide films. The results indicate that the stability of thermal copper oxide increases with oxidation temperature. The film produced at 700 °C maintained consistent optical properties, work function value, and structural integrity over time, demonstrating their robustness against environmental degradation. In contrast, the layers produced at lower temperatures (300 °C and 500 °C) showed more significant changes due to continued oxidation and adsorption from ambient.

Macroporous p-SnO/n-SnO2 heterojunction photocatalysts via dealloying and thermal oxidation of immiscible Sn30Zn70 precursors to boost photodegradation

Controlled synthesis of macroporous tin photocatalyst with a SnOx surface layer (SnOx@P-Sn) was achieved via chemical dealloying then thermal oxidation. The microstructure of macroporous Sn was inherited from the immiscible Sn30Zn70 precursor. The chemical composition of surface SnOx and the concentration of oxygen vacancies on the Sn ligaments is dependent on the thermal oxidation temperature, with p-SnO/n-SnO2 heterojunctions being formed at 500°C. The obtained SnOx@P-Sn@500°C p-n heterojunction surface layer achieved an outstanding degradation efficiency of 96.7 % when used to catalyze the photodegradation of methyl orange azo dyes (MO). The Langmuir-Hinshelwood Kinetics model was modified to describe the photodegradation process with higher coefficient of determination. The reason for the superior degradation reaction rates of SnOx@P-Sn@500°C p-n heterojunction photocatalyst includes: large specific surface area of the Sn substrates, appropriate band gap formed via thermal oxidation, higher oxygen vacancies, and efficient separation of electron/hole pairs in the p-SnO/n-SnO2 heterojunction.

Normal spectral emissivity measurement study of high-temperature alloy (316L) at 673–1273 K with a thermal oxidation surface

One effective approach to better understanding the performance characteristics of high-temperature alloys is to study their thermal oxidation behavior, and to accurately determine their spectral emissivity is helpful for increasing the accuracy of temperature measurements. Using a self-developed high-temperature emissivity testing system, the normal spectral emissivity across the range 673–1273 K and a spectral band of 1–14 μm was measured relative to this background radiation. The normal spectral emissivity of 316L high-temperature alloy was investigated during the thermal oxidation process. The change in emissivity of 316L high-temperature alloy during thermal oxidation was observed. The emissivity of the 316L high-temperature alloy undergoes great changes during thermal oxidation; for example, at 1273 K it was 0.055 in its un-oxidized state but after 50 h’ thermal oxidation went up to 0.829. Below 1073 K the emissivity of 316L high-temperature alloy in 8–14 μm range showed little change, making it ideal for radiation thermometry. By fitting the measurement data, we derived that the emissivity of 316L high-temperature alloy has an exponential relationship with thermal oxidation temperature, and is a power function relationship with thermal oxidation time.

Thermal and Sound Insulation Properties of Organic Biocomposite Mixtures.

Sustainable building materials with excellent thermal stability and sound insulation are crucial for eco-friendly construction. This study investigates biocomposites made from cellulose pulp reinforced with beeswax, fir resin, and natural fillers like horsetail, rice flour, and fir needles. Eight formulations were obtained, and their thermal resistance, oxidation temperature, and acoustic properties were evaluated. Biocomposites exhibited significant improvements compared to conventional materials. Oxidation temperature onset increased by 60-70 °C compared to polyurethane foam or recycled textiles, reaching 280-290 °C. Sound absorption coefficients ranged from 0.15 to 0.78, with some formulations exceeding 0.5 across mid-frequencies, indicating good sound-dampening potential. These findings demonstrate the promise of these biocomposites for sustainable construction, offering a balance of thermal and acoustic performance alongside environmental and health benefits.

In situ synthesis of Fe2O3/Fe3O4 nanoarray hybrid as highly effective electrocatalysts for alkaline hydrogen evolution

It is of great importance to rationally develop and design cost-effective, high durable and non-noble metal catalysts for electrocatalytic water splitting. Here, self-supported well-defined crystalline iron oxides hybrid (FeOx/IF) was successfully fabricated by facile in-situ thermal air oxidation of iron foam. An investigation into the effects of thermal oxidation temperature on the crystalline structure and surface appearance of FeOx/IF was studied. The resultant FeOx/IF-550 reveals nanoarrays morphology composed of Fe2O3 and Fe3O4 hybrid with Fe2O3 and Fe3O4 heterojunctions, which exhibits remarkably superior catalytic activity towards HER with a low overpotential of only 98 mV to drive a current density of 10 mA cm−2 in alkaline solution. Meanwhile, FeOx/IF-550 exhibits good durability with negligible attenuation of overpotential at a large current density of 500 mA cm−2 for 24 h in alkaline solution. The excellent HER performance of FeOx/IF is mainly attributed to the synergistic effect of Fe2O3 and Fe3O4, increased accessible active sites and accelerated charge transfer. The present study provides new insights into the design of cost-effective electrocatalysts with high activity and excellent stability for industrialization.

SIMULTANEOUS ANODIC AND CATHODIC ELECTRODEPOSITION OF Cu2O FOR SOLAR ENERGY CONVERSION

Copper oxide, Cu2O is a highly versatile product that can obtained by different techniques including high/low temperature thermal oxidation, sputtering, chemical oxidation, anodic oxidation, electrodeposition, among others. Until now, the most efficient synthetic processes to obtain Cu2O require relatively expensive equipment; therefore, we have developed a novel method based on simultaneous convergent oxidation-reduction reactions in an electrolytic cell at ambient pressure and relatively low temperature. In this work, a Cu(0) plate is oxidized to Cu(I) in the anodic compartment, while a Cu(II)- lactate complex is formed in the cathodic compartment of the cell and then Cu(II) is reduced to Cu(I), all in aqueous media.

Mechanical, Thermal Properties of Virgin, Recycled and Mixed High-Density Polyethylene Matrices and Wood Plastic Composites with Plywood Sanding Dust

Virgin high-density polyethylene (vHDPE), recycled (rHDPE), and mixed vHDPE/rHDPE matrices and wood plastic composites based on these mixtures + 50 wt.% of plywood sanding dust (PSD) and 3 wt.% coupling agent maleated polyethylene (MAPE) physical-mechanical properties (tensile, flexural strength and modulus, impact strength, and microhardness) were investigated. It was observed that all defined properties depend on the content of rHDPE in the pure polymer matrix and corresponding WPCs. Tensile strength and modulus decreased a bit, but flexural modulus actually had no changes. At the same time, a decrease in impact strength and a significant increase (up to 2 times) in microhardness are observed. From all the investigated matrices, the most perspective seems to be the matrix with a vHDPE/rHDPE ratio of 75/25, whose mechanical properties are acceptable for the preparation of the WPCs based on plywood sanding dust. The compatibilization possibilities tests of different mixed matrices done by the DSC method in the air showed that the mixed vHDPE/rHDPE compositions compatibility is sufficiently good at different proportions. For all mixed matrices, only one relatively symmetric band with one peak of melting was observed. Differential scanning calorimetry (DSC) tests in an inert environment showed that during the first heating cycle, HDPE components are only partially compatible (two peaks of melting temperatures are possible to fix). On the contrary, after the cooling and crystallization processes, during the second heating of the same sample, these two bands completely merge, and like in the air, only one maximum melting temperature peak was observed. The values of thermal oxidation temperature and melting temperature are the highest for virgin vHDPE but the lowest for rHDPE. The values of all corresponding parameters of mixed matrices reduce proportionally with an increase in rHDPE content in the mixtures.

Preparation and performance characterization of functionalized boron-based energetic-microcapsules with uniform size

Energetic metal and metalloid nano-powders are highly promising as high-energy fuel or energetic additive of propellants. Specifically, boron has extremely high gravimetric and volumetric calorific values. However, the difficulty of ignition, slow combustion and uncomplete energy release limit its application. Herein, we developed an effective strategy to fabricate the functionalized energetic-microcapsules (nB@M−CS) with uniform size (with coefficient of variance lower than 3%) using droplet microfluidic technology, in which the boron nanoparticles (nBs) are uniformly encapsulated in chitosan (CS), with organometallic catalyst (M = Mo, Fe and Co) homogeneously dispersed inside. During combustion, nB@M−CS can overcome the agglomeration of nBs by generating micro-explosion to release and ignite the inner nBs, and the low loading (<2 wt%) and high dispersion of metal catalyst can shorten the mass transfer distance and enhance the contact area between nBs and M catalyst. These can significantly reduce the thermal oxidation temperature and accelerate the combustion rate. Specifically, nB@Mo-CS shows much lower initial oxidation temperature (393 °C) than the previously reported B particles, and exhibits the combustion heat and maximum pressurization rate increased by 114.3% and 7.3 times, respectively, compared with nBs. This work shows the great potential for designing and synthesizing functionalized propellant using microfluidic technology.

Study on the thermal release characteristics and the correlation transformation mechanism of microscopic active groups of oxidized coal combustion in a deep mined-out area

With the normalization of deep mining, the risk of residual coal spontaneous combustion (CSC) in deeply mined areas has gradually increased. To investigate the thermal characteristics and microgroup transformation mechanisms during the secondary oxidation of deep-well oxidized coal, a deep-well oxidation process was simulated in a synchronous thermal analyzer, and the thermal parameters of the oxidized coal were tested. The correlated transformation pathways of microscopic active groups was studied by electron paramagnetic resonance (EPR) and in situ diffuse reflectance (in situ FTIR) experiments during the reoxidation of oxidized coal. The results showed that with increasing deep-well ambient temperature and oxidation temperature, the characteristic temperature of coal gradually decreased, exothermic heat release gradually increased, and active aliphatic structures and -OH, -CHO and other active functional groups gradually accumulated and became distributed more uniformly. When the thermal conditions and oxidation temperature were very high (> 160 °C), the active free radicals in the oxidized coal were rapidly consumed, resulting in a gradual decrease in the characteristic temperature and heat release during the secondary oxidation process, while the contents of peroxy and carboxyl groups continued to increase. In the slow oxidation stage of oxidized coal, methyl groups were mainly transformed with hydroxyl and peroxide groups (r > 0.96), and the associated oxidative consumption of -CHO and -COOH mainly occurred in the rapid oxidation stage (r > 0.99). Geminal diols and peroxy groups are important intermediates in the coal–oxygen composite reaction process. With an increase in the deep-well temperature and initial oxidation temperature, the reoxidation tendency and heat release capacity of residual coal in the goaf gradually increased, and the risk of CSC intensified. The research results provide a theoretical reference for the prevention and control of coal fires in deep mines and play an important role in guiding environmental management and gas emissions reduction measures in mining areas.

Oxide derived Cu nanofibril assembly for enhanced nonenzymatic glucose sensing

In this report, we have prepared copper nanofibril assembly via thermal oxidation followed by electrochemical reduction processes, exhibiting superior glucose detection ability. The morphological analysis evidenced the formation of rough islands or nanofibril structure on the Cu surface depending on initial thermal oxidation temperature. The glucose detection performance was investigated by performing cyclic voltammetry and chronoamperometry with varying glucose concentration. A high sensitivity (4131.57 μA mM−1 cm−2), low detection limit (1.41 μM), wider linear range (0–3.9 mM) and long–term stability (30 days) have been recorded for electrode thermally oxidized at 400 °C followed by electrochemical reduction process (rCu_400). The sensitivity is almost three times higher in comparison to the planner Cu surface. This significantly enhanced glucose sensing ability rCu_400 has been attributed to the nanofibril morphology, origination of Cu (111) facet and formation of a stable oxide layer evidenced by scanning electron microscopy, X-ray diffraction and energy dispersive spectroscopy analysis. Despite higher sensitivity, rCu_400 electrode does not show any response to the chloride ion, dopamine, ascorbic acid and uric acid. These results indicate that the Cu nanofibril structure prepared via simple oxidation/reduction process can be an excellent candidate to be used as an electrode for glucose sensing application.

The Modelling of SiC Gate Oxide Thickness based on Thermal Oxidation Temperatures and Durations for High-Voltage Applications

This research has shown that the oxide thickness for silicon carbide (SiC) based wide materials can be predicted using regression techniques in wet/dry nitrided or wet/dry non-nitrided thermal oxidation process conditions for high voltage applications by employing 2 different regression techniques: Polynomial and linear regression. The R-squared (R2) and Mean Absolute Percentage Error (MAPE) techniques are used to evaluate the regression models. Furthermore, this work investigates and presents a calculation of gate oxide thickness that is correlated to gate voltage ranges for high voltage applications. In this work, the thermal oxidation process environment is classified into 3 different processing conditions: conventional (dry and wet), dry nitrided (NO,N2O), and wet nitrided (HNO3 vapour). The findings from this study showed that wet oxidation combined with nitrided elements can produce thicker and better-quality gate oxide as compared to conventional dry and wet oxidation techniques. The outcome of this work clearly shows that gate oxide thickness may be derived from silicon carbide-based wide-bandgap materials utilizing linear and polynomial approaches using thermal oxidation durations at different temperatures for high-power applications. The regression models and formulations produced in this work are expected to aid the researchers in determining appropriate oxide thickness under practicable process conditions, with the exception of real thermal oxidation process conditions. Hence, the outcome of this work is expected to save the processing time, material, and cost of the power semiconductor device fabrication technology, mainly for high voltage applications. HIGHLIGHTS Regression approaches are being used to determine the oxide thickness (Tox) for SiC-based broad materials in nitrided and non-nitrided thermal oxidation process conditions for high-voltage applications The regression models are assessed using the R-squared (R2) and Mean Absolute Percentage Error (MAPE) approaches The results of this work are anticipated to reduce processing time, material requirements, and manufacturing costs for power semiconductor devices used in high-voltage applications GRAPHICAL ABSTRACT

Thermal air oxidation of UO2: Joint effect of precursor's nature and particle size distribution

The rate and extent of the air oxidation of UO2 are of paramount importance due to its relevance in the management of spent nuclear fuel at dry storage facilities. In particular, the formation of U3O8 requires special interest because it could compromise the integrity of the fuel cladding. In an attempt to reproduce the behavior of used fuel (in which the presence of fission products and Pu will also influence the oxidation), unirradiated UO2 was studied in this work. UO2 oxidation is strongly dependent on physical parameters of the starting material, although some parameters are not fully-studied. In the present study, the nature of the UO2 starting material and the particle size distribution on thermal oxidation temperature were evaluated in detail. Since UO2 oxidation follows a complex kinetic mechanism comprising various crystalline phases, which composition and quantity change influenced by temperature and oxidant gas phase, oxidation conditions were set to favor the formation of U3O8, due to its practical importance, as well as to study the impact of the physico-chemical properties of raw material in UO2 oxidation. Various powdered sample substrates ranging from synthetic UO2 (prepared via ADU route) to grinded and sieved fragments of fresh UO2 pellets were oxidized in the same conditions. The average O/U atomic ratios of the samples were calculated by assuming total conversion to U3O8 from data of thermogravimetric analysis (TGA). Each weight variation curve was characterized and discussed in terms of the Oxidation Onset Temperature (OOT), the Maximum Reaction Temperature (MRT), and the Reaction Rate at the maximum reaction temperature (RRMRT). Scanning Electron Microscopy (SEM) was employed to evaluate the surface morphology. All thermally oxidized samples exhibit the presence of oxides with spallation. Surface morphology of starting materials confirms the different nature of the samples, while the oxidized substrates present the typical pop-corn-like particles. In order to accomplish a better description of UO2 oxidation, the results are discussed relative to the nature of different UO2 precursors, surface area and particle size. The nature of the starting materials affects the rate of U3O8 formation, being faster in synthetic powders than in powder coming from milled pellets. By comparing materials with the same origin, the effect of the width of the particle size distribution is proved for the first time, being the oxidation to U3O8 slower in the substrate with a wider distribution (labelled material P3). Since P3 is more similar to a real irradiated fuel pellet, from a mechanistic point of view, this work present valuable input to security studies of dry storage facilities for spent fuel.

Enhanced corrosion and wear resistance via thermal oxidation treatment on Zr-2.5Nb alloy for implant applications

The Zr-2.5Nb alloys were selected for thermal treatment from 500 to 800 °C in air. The effects of oxidation temperature on microstructure, phase composition, oxide film thickness, hardness, and element distribution were investigated. The results revealed that the oxide film thickness and hardness showed a positive correlation as the oxidation temperature increased. The oxide film was mainly composed of ZrO2 and Nb2O5. The effect of oxidation temperature on the phase composition of the oxide film was also investigated, and it was found that the content of m-ZrO2 gradually increased with increasing temperature, and the content of Nb2O5 remained basically unchanged. Impedance and potentiodynamic polarization curves technique of oxide films in simulated body fluids at pH = 2.86 were investigated, and the results showed that a suitable thermal oxidation temperature could significantly improve the corrosion resistance of the Zr-2.5Nb alloy. In addition, the wear resistance of the specimens after thermal oxidation was investigated, and it was found that the wear resistance of the oxidized specimens was significantly improved. And the biocompatibility of the thermal oxide film was investigated by hemolysis test and contact angle experiments.

Application of carbon nitride nanosheets for adsorption of various humic substances from aqueous solutions

Humic substances (HSs) cause serious problems such as membrane fouling and disinfection by-products. Particularly, HSs as the main UV-quenching substances in landfill leachate pose great challenges. In this study, we evaluated the application of carbon nitride nanosheets (CN-Ns) for adsorption of various HSs, as well as leachate nanofiltration concentrates (LNCs). The characterization revealed that as increasing thermal oxidation temperature, the properties of CN-Ns were affected, such as morphology, porosity, and crystallinity. The surface area of CN-N at 575 °C (CN-N-575) was 145.3 m2·g−1, resulting in an enhanced adsorption performance. The adsorption capacity of CN-N-575 for lignite humic acid (LHA) and soil fulvic acid (SFA) was considerably greater than that of bulk CN; the maximum adsorption amounts of LHA and SFA were 143.11 and 63.27 mg C·g−1, respectively. Upon adsorption, the removal rate of LHA and Elliott soil humic acid was about 90 %. Among HSs and LNCs, the humic-like components showed superior affinity; in some cases, the removal rate reached 100 %. The adsorption preference of aromatic compounds in HSs and LNCs was ascribed to π-electron interactions. The adsorption of LHA was more pH-dependent than that of SFA, attributed to the interactions (electrostatic, hydrogen bonding, and complexation) along with a specific conformation effect. The findings proved the great potential of CN-Ns in HSs adsorption, especially in the treatment of landfill leachate.

Effect of thermal oxidation on structural and tribological properties of MoS2 films

AbstractThe aim of this study is to investigate the structural, mechanical and tribological behaviours of thermally oxidized MoS2 films. MoS2 coatings were deposited on D2 tool steel substrates using the closed field unbalanced magnetron sputtering method (CFUBMS). The thermal oxidation process was carried out at four different temperatures. Tribological properties were determined by pin‐on‐disc wear tests in the atmospheric environment. It was determined that thermal oxidation temperatures affected the chemical composition of MoS2 films, but did not cause any change in film thickness. The wear rates of the samples differed depending on the oxidation temperature and the applied load. The lowest wear rate was determined as 1.97 × 10−8 mm3/Nm in the oxidized film at 350°C. In addition, the highest hardness value was obtained as 655 HV in the film oxidized at 400°C, and the lowest coefficient of friction was obtained as 0.01 in the film oxidized at 350°C.

Characterization of Magnesium Alloy AZ31 due to Thermal Oxidation Temperature

Magnesium and its alloy have good characteristics for implant materials. Increasing these characteristics is needed to be an excellent material. The objective of this research is to investigate the magnesium alloy AZ31 (Al: 3.07%; Zn: 1.05%) characteristics affected by thermal oxidation temperature. Investigated characteristics in this study were hardness, corrosion resistance, and microstructure. The temperature variations of thermal oxidation were 100, 200, 300, 400 °С. The Vickers micro-hardness decreased with increasing of thermal oxidation temperature and the as-received of Mg alloy had the highest Vickers micro-hardness. The lowest corrosion resistance occurred at 200 °С of thermal oxidation temperature but this corrosion resistant was higher than that at the as-received material. The microstructures of Mg alloy were looked cracked in their grains at the thermal oxidation temperature over than 200 °С. The cracks increased by increasing of the thermal oxidation temperature.

Investigation of Dry Sliding Friction, Wear and Mechanical Behavior of the Ti-6Al-7Nb Alloy after Thermal Oxidation.

The mechanical and tribological characteristics of the Ti-6Al-7Nb alloy were investigated within a wide range of temperature and time parameters of thermal oxidation. The hardness, HIT, and indentation modulus, EIT, of the alloy in question, with and without an anti-wear oxide layer, were determined. The tribological properties of sliding couples were studied under technically dry friction conditions, using a ball-on-disc tribometer. The test pieces were non-oxidized and oxidized Ti-6Al-7Nb alloy discs, and Al2O3, ZrO2, and 100Cr6 balls were used as counter specimens. After thermal oxidation, the surface of the titanium alloy was characterized by a significantly higher hardness, HIT (8–10 GPa), compared to the surface not covered with oxide layers (3.6 GPa). The study showed that the curvature of the loading segments increased with an increasing oxidation temperature, indicating a strong positive dependence of hardness on the thermal oxidation temperature. The value of the indentation modulus, EIT, was also found to increase with the increasing oxidation temperature. The intensity of the tribological processes was strictly dependent on the oxidation parameters and the couple’s material (Al2O3, ZrO2, 100Cr6). It has been shown that the thermal oxidation process makes it possible to control, within a wide range, the friction-wear characteristics of the Ti-6Al-7Nb alloy.

The influence of the physicochemical nature of the components of the V2O5/GaAs, MnO2/GaAs, V2O5/InP, MnO2/InP, TiO2/InP, and SnO2/InP heterostructures and the oxidation conditions on the surface morphology of the synthesised films

The formation of oxide functional films on the surface of semiconductors is a serious technological challenge, which is even more complicated in the nanometre thickness range. It is necessary to form films with specified values of thickness, resistivity, and a certain surface morphology for practical applications. Such films are used in micro- and optoelectronics, environmental monitoring, and alternative energy devices. The goal of this work is to establish the features of the surface morphology of thin films formed as a result of the thermal oxidation of the MnO2/GaAs, V2O5/GaAs, V2O5/InP, MnO2/InP, TiO2/InP, and SnO2/InP heterostructures depending on the physicochemical nature of the components and the oxidation conditions. The synthesis of thin films on the InP and GaAs surfaces was carried out by thermal oxidation under the influence of magnetron-deposited layers of chemostimulator-modifiers. The thickness of the formed films and their composition were determined by laser ellipsometry, X-ray phase analysis, and infra-red spectroscopy. The scanning tunnel and atomic force microscopy were used to determine the morphological characteristics of the films and their dependence on the type of semiconductor substrate, the nature of the chemostimulator-modifier, and the conditions of the thermal oxidation. The application to the GaАs and InP surfaces of the most effective chemostimulator-modifiers (V2O5 and MnO2) of thermal oxidation and higher temperatures of the oxidation process contributed to the formation of smoother and nanostructured films.

Revised parametrization of the recombination velocity at SiO2/SiNx-passivated phosphorus-diffused surfaces

We investigate the effective surface recombination velocity Seff of alkaline textured, Phosphorus-diffused and thermal SiO2/SiNx passivated surfaces with an emphasis on the impact of the thermal oxidation temperature. The application of a recent calibration procedure for the carrier lifetime measurements enables a precise determination of the dark saturation current density. The experimental results include 25 diffusion/oxidation process combinations that cover a wide range of final surface concentration levels Ns between 3⋅1020 cm−3 and 1⋅1019 cm−3, using oxidation temperatures Tox from 650 °C to 900 °C. This yields a data set that enables a revision of the commonly applied parameterization of the effective surface recombination velocity of this passivation scheme using numerical simulation. In addition, the impact of fixed surface charges is modeled for separating field effect and chemical passivation properties. Also, the role of the oxidation temperature on the passivation quality is investigated.

Effect of oxidation temperature on the corrosion response of anodic coatings on Ti6Al4V alloy : Efecto de la temperatura de oxidación en la respuesta a la corrosión de los recubrimientos anódicos en la aleación de Ti6Al4V

In this study, the effect of thermal oxidation temperature on Ti6Al4V alloy anodized coatings by the corrosion response was assessed through the potentiodynamic, open-circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) tests in 3.5% NaCl solution. Optical microscopy and scanning electron microscopy were used to study and correlate the microstructural evolution with the analysis of corroded regions. Digital image analysis provides to estimate temperature increases in the porous layer of TiO2 arising in increased corrosion resistance. The results over TiOX560° condition were presented an increased corrosion resistance compared to the base metal and other conditions. From digital image processing could be estimated possible growth of the porous layers rich in TiO2 increasing corrosion resistance of the heat-treated samples regarded to the base metal. Keywords: Ti6Al4V, EIS, TiO2, Corrosion, Image analysis