Metal Anticorrosion Research Articles

Multifunctional organic-inorganic hybrid coating for enhanced bronze corrosion protection

Bronze relics with vital historical, artistic, and scientific value, are one of the significant symbolizations of human civilization. However, due to the long burial time and the change in storage conditions, an inevitable and thorny problem arises in preventing the ancient bronze relics from corrosion. Coatings have great potential for metal corrosion protection at present. This study prepared a multifunctional coating consisting of zinc oxide (ZnO), titanium dioxide (TiO2), and fluoroethylene vinyl ether (FEVE) polymer by an organic-inorganic hybrid, which was applied onto the surface of corroded bronze using a self-assembly method and spraying. The rough structure of composite coating resembling that of the mastoid structure found on lotus leaf, effectively prolongs the transmission path of corrosive ions while preventing bronze contact with the corrosive media. Additionally, this study mainly investigated the bronze anti-corrosion mechanism through an electrochemical analysis perspective. Electrochemical tests revealed the lower corrosion current density, and the positive corrosion potential of multifunctional FEVE@ZnO/TiO2 coating immersion in 3.5 wt% NaCl solution. The experimental results demonstrate that the synergistic effect of organic-inorganic significantly enhances corrosion resistance by retarding the corrosion process and providing active protection against corrosion. The multifunctional coating also exhibits exceptional self-cleaning properties and weatherability when without changing the bronze color and appearance. Consequently, this preparation strategy and research approach for constructing a multifunction coating has a great application prospect in the conservation of bronze relics and metal anti-corrosion.

A novel UV-curable composite coating with superior anti-corrosion and mechanical properties

The UV curing method is free from volatile organic compounds (VOC) and exhibits high curing efficiency. However, pore flaws and inadequate mechanical qualities after cure greatly hinder their utilization in metal anti-corrosion. Herein, layered double hydroxides (LDH) supported by molybdic acid and cerium ions were synthesized in situ on the sericite (SC) surface, enhancing the shielding, corrosion inhibition, resin compatibility, and cross-linking density of the coating. Compared with carbon steel immersed in a 3.5 wt% NaCl solution, the incorporation of SC/KH560@LDH reduced the corrosion current density (Icorr) from 2.001 × 10−5 A/cm2 to 7.883 × 10−6 A/cm2. Moreover, the low-frequency impedance of the UV-SC/KH560@LDH coating remained high at 1.939 × 1010 Ω·cm2 after 70 days of immersion in a 3.5 wt% NaCl solution. The excellent corrosion resistance of UV-SC/KH560@LDH can be attributed to the barrier properties of the filler, the chloride ion trapping, and the passivation effect. Furthermore, the UV-curable alkyd resin used in this work formed a chemical bond with the metal substrate, enhancing the mechanical properties of the coating. The adhesion strength of the UV-SC/KH560@LDH was measured at 11.50 MPa. The thickness loss (21.3 μm) of the UV-SC/KH560@LDH were minimal after 5000 cycles of wear. A new research concept for preparing the UV-SC/KH560@LDH with superior anti-corrosion and mechanical properties for carbon steel plate surfaces has been proposed to meet the demands of practical applications.

Superhydrophobic Waterborne Epoxy Composite Coating with Good Mechanical Properties, Icing Resistance, Self-Cleaning Properties, and Corrosion Resistance.

Epoxy resins with higher corrosion resistance typically employ environmentally harmful organic solvents such as xylene, while the corrosion resistance of waterborne epoxy resins, which are relatively environmentally friendly, is not as good as that of oil-based epoxy resins. In this study, by coating the surface of waterborne epoxy resin with a superhydrophobic zinc oxide coating, the corrosion resistance of waterborne epoxy resin was enhanced. During the initial immersion, its impedance value can reach 1010 Ω·cm2. The superhydrophobic nature of the coating itself also ensures the surface's resistance to immersion, delaying the intrusion of corrosive media into the coating. Furthermore, this coating exhibits good mechanical properties, self-cleaning performance, anti-icing performance, and so on. The introduction of superhydrophobic surfaces greatly optimizes the performance of traditional waterborne epoxy resin coatings, opening up directions for the metal anticorrosion field of coatings. Meanwhile, during the EIS testing of the superhydrophobic coating, we observed the occurrence of negative impedance in the results. After studying, we speculated that this phenomenon might be related to the degree of wetting of the superhydrophobic coating. Based on this conjecture, we can evaluate the basic properties of the superhydrophobic coating through this phenomenon.

A highly stable zinc anode protected by a corrosion inhibitor for seawater-based zinc-ion batteries

The island-based energy storage is of urgent need for the grid construction combined with renewable energy for offshore operation. The direct use of seawater as a substitute of deionized water shows its great promise for aqueous zinc-ion batteries in such a specific situation. However, the metal corrosion, dendrite growth, and hydrogen evolution stand out in the harsh seawater environment. To address these challenges, we proposed a corrosion inhibitor that was effective in the field of metal anti-corrosion, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), to inhibit anode corrosion caused by Cl– and active H2O molecules by forming a stable solid electrolyte interphase (SEI) film in the seawater-based electrolyte. Besides, PBTCA can chelate with other cations present in seawater, such as Ca2+ and Mg2+, thereby preventing the aggregation and precipitation of sparingly soluble species. Under a current density of 5 mA cm−2, the seawater-based zinc-ion battery exhibited an exceptional cycle life exceeding 2000 h and maintained a Coulombic efficiency of over 99.6% after 2000 cycles. Additionally, the performance of the Zn||ZVO full battery was significantly enhanced with the addition of PBTCA. This study provides a simple, low-cost, and efficient approach for making the seawater-based zinc-ion batteries useable.

Ultrathin Al2O3 film modification on waterborne epoxy coatings by atomic layer deposition for augmenting the corrosion resistance

The polar channels formed by the curing of waterborne anticorrosive coatings compromise their water resistance, leading to coating degradation and metal corrosion. To enhance the anticorrosive performance of waterborne coatings, this study proposed a novel method of depositing ultrathin Al2O3 films on the surface of waterborne epoxy coatings by atomic layer deposition, a technique that can modify the surface properties of polymer materials by depositing functional films. The Al2O3-modified coatings exhibited improved sealing and barrier properties by closing the polar channels and surface defects and cracks. The surface structure and morphology of the modified coatings were characterized by x-ray photoelectron spectroscopy and scanning electron microscopy. The hydrophilicity and corrosion resistance of the modified coatings were evaluated by water contact angle measurement, Tafel polarization curve, and electrochemical impedance spectroscopy. The results indicated that the water contact angle of the Al2O3-modified coating increased by 48° compared to the unmodified coating, and the protection efficiency of the modified coating reached 99.81%. The Al2O3-modified coating demonstrated high anticorrosive efficiency and potential applications for metal anticorrosion in harsh marine environments.

Facile and Rapid Fabrication of (trifluoropropyl) Silsesquioxanes/Ethyl Cyanoacrylate-Based Hybrid Superhydrophobic Coatings for Oil–Water Separation and Metal Anticorrosion

Facile and Rapid Fabrication of (trifluoropropyl) Silsesquioxanes/Ethyl Cyanoacrylate-Based Hybrid Superhydrophobic Coatings for Oil–Water Separation and Metal Anticorrosion

Rational engineering of semiconductor-based photoanodes for photoelectrochemical cathodic protection

Photoelectrochemical (PEC) cathodic protection based on semiconductor photoanodes, by combining solar energy utilization and metal anticorrosion, provides a promising platform for developing an environmentally friendly metal protection technology. In this context, semiconductors (e.g., TiO2, ZnO, SrTiO3, BiVO4, and g-C3N4), with merits of suitable band structure, good chemical stability, and low cost, have attracted extensive attention among the investigated photoanode candidates. However, the poor optical absorption properties and the high photogenerated charge recombination rate severely limit their photocathodic protection performances. In order to break these limitations, different modification strategies for these photoanodes have been developed toward the significant enhancement in PEC cathodic protection properties. In this Review, the rational engineering of semiconductor-based photoanodes, including nanostructure design, elemental doping, defect engineering, and heterostructure construction, has been overviewed to introduce the recent advances for PEC cathodic protection. This Review aims to provide fundamental references and principles for the design and fabrication of highly efficient semiconductor photoanodes for PEC cathodic protection of metals.

Superhydrophobic magnesium hydroxide layer with self-healing behavior and long-term anti-corrosion property via surface modification with insufficiently hydrolyzed silane

The long-term anti-corrosion of superhydrophobic materials is essential to its practical application, as well as the self-healing behavior which can significantly increase the lifetime of the superhydrophobic surfaces in corrosive environment. Magnesium hydroxide, as a non-toxic, eco-friendly, and low-cost material, has been applied to fabricate robust superhydrophobic layer through electrodeposition under the structure direction of xanthan gum in our reported works. In this work, we designed a method of fabricating superhydrophobic magnesium hydroxide layer with self-healing ability through a special silane modification method. 1H,1H,2H,2H-perfluorodecyltriethoxysilane was treated into a hybrid of both hydrolysate and amounts of unhydrolyzed small units. The remained unhydrolyzed units hydrolyzed during the corrosion process, and modified the exposed magnesium hydroxide again. In this way, the lifetime of the superhydrophobic surface is significantly prolonged (624 h). The prepared superhydrophobic magnesium layer also demonstrates excellent water repellency (contact angle, 157.33 ± 4.78°; sliding angle, 3.80 ± 1.05°), self-cleaning property, robustness (adhesion, 5B; linear abrasiveness, 2400 mm), and high inhibition efficiency (99.9991 %). This study put a foot further to the application of low-cost and eco-friendly superhydrophobic materials with long lifetime in the field of metal anti-corrosion.

A Review of Recent Modification, Optimization, and Functionalization Methods for Organic Anticorrosive Coatings

Corrosion problems are widespread in nature. As one of the most convenient and efficient methods for metal anticorrosion protection, anticorrosive coatings have received increasing attention. With the continuous advancement of science and technology, more novel functional anticorrosion coatings are being extensively researched. This review provides an overview of recent research progress in anticorrosion coatings and functionalized modified materials. Recent methods for performance optimization can be categorized into three main sections: modification by nanoparticles, modification by carbon-based materials, and specific functionalization (barrier effect, passivation, shielding effect, resistivity, self-repair). Through modification, the anticorrosion performance of coatings is significantly enhanced, with impedance levels improving by up to three orders of magnitude. Furthermore, modification imparts additional outstanding features to the coatings, such as high-temperature resistance, thermal conductivity, self-healing, and hydrophobicity. Finally, the future development trend of anticorrosion coatings is proposed, and several reasonable suggestions are put forward for the challenges faced.

Study on the anticorrosion and antifouling performance of magnetically responsive self-healing polyurethane coatings

The dispersivity of self-healing microcapsules plays a critical role in the self-repairing properties of coatings. However, resolving the aggregation phenomenon of self-healing microcapsules has been challenging due to their high surface energy. In this paper, we successfully developed magnetically responsive self-healing microcapsule (MS-TO@CA) and polyurethane (PU) coatings with biomimetic interface wet-adhesion patterned microstructures and realized the adsorption, automatic capture and dispersion of MS-TO@CA based on different patterned microstructure sizes, microparticle sizes and contents. COMSOL software was used to simulate the magnetic field design and distribution, and the magnetization phenomenon of the microstructure was analyzed. The optimal process for the preparation of a new type of magnetically responsive self-healing PU coating was proposed. Compared with the control group, the corrosion time of the metal under the action of the coating was delayed by 816 h, and the antifouling performance was improved by approximately 30 times. This work has guiding significance for prolonging the service life of metals and improving metal anticorrosion and antifouling.

Ag Electrode Anticorrosion in Inverted Perovskite Solar Cells

AbstractAg electrode is widely used in inverted perovskite solar cells (PSCs), but its easy reaction and corrosive nature with perovskite always induces severe stability issue. Here, from typical theory of metal anticorrosion, a chemical anticorrosion approach for Ag electrode in inverted PSCs through introducing 2‐mercaptobenzothiazole (MBT) as a corrosion inhibitor is reported. MBT can strongly bond to Ag and form a compact [MBT‐Ag] chain on Ag surface owing to its N atom in thiazolyl ring and exocyclic thiol groups. As a result, Ag anticorrosion ability is greatly enhanced by increasing the corrosion potential and decreasing the corrosion current, thus effectively inhibiting possible chemical reaction and corrosion between perovskite and Ag electrodes. PSCs containing MBT/Ag exhibit high efficiency of over 23% with good stability, retaining 95 ± 4.1% of initial efficiency after storage for 3800 h in glovebox. Importantly, resulting PSCs also show excellent thermal stability, maintaining 90 ± 1.8% of initial efficiency after aging for 900 h at 85 °C.

CoP-loaded BiVO4 for highly active and robust photocathodic protection of 304 stainless steel

Despite the narrow band gap and the suitable band edge position, the BiVO4 photoanode exhibits low metal anticorrosion performance due to inefficient charge separation and transfer. In this work, we introduce a CoP electrocatalyst with metal character on the BiVO4 surface by cyclic voltammetry to address this challenge, which greatly enhances the electron injection efficiency into the protected metal. The modified BiVO4 photoanode exhibits high solar water oxidation activity, resulting in a 123 mV cathodic shift on the self-corrosion potential of 304 stainless steel (304SS), enabling excellent metal protection. Additionally, the coupled composite photoanode shows high photo stability under light illumination, with only 8% decay on the open circuit potential after 51 h of photo-illumination. Our mechanism study shows that the CoP overlayer can act as the hole collector and electrocatalyst for water oxidation, and thus the BiVO4 valence band holes are effectively transferred to the CoP and subsequently to water. Such an improvement inhibits the charge recombination increasing the electron lifetime, and thus realizing the effective protection of 304SS. The present work offers a rather simple process that allows the effective deposition of CoP electrocatalyst on BiVO4 surfaces, which effectively protects metals from corrosion.

Superior Anticorrosion Performance of Well-Dispersed MXene-Polymer Composite Coatings Enabled by Covalent Modification and Ambient Electron-Beam Curing

MXene-reinforced composite coatings have recently shown promise for metal anticorrosion due to their large aspect ratio and antipermeability; however, the challenges of the poor dispersion, oxidation, and sedimentation of MXene nanofillers in a resin matrix that are often encountered in the existing curing methods have greatly limited practical applications. Herein, we reported an efficient, ambient, and solvent-free electron beam (EB) curing technology to fabricate PDMS@MXene filled acrylate-polyurethane (APU) coatings for anticorrosion of 2024 Al alloy, a common aerospace structural material. We showed that the dispersion of MXene nanoflakes modified by PDMS-OH was dramatically improved in EB-cured resin and enhanced the water resistance through the additional water-repellent groups of PDMS-OH. Moreover, the controllable irradiation-induced polymerization enabled a unique high-density cross-linked network, presenting a large physical barrier against corrosive media. The newly developed APU-PDMS@MX1 coatings achieved excellent corrosion-resistance with the highest protection efficiency of 99.9957%. The coating filled with uniformly distributed PDMS@MXene promoted the corrosion potential, corrosion current density, and corrosion rate to be -0.14 V, 1.49 × 10-9 A/cm2, and 0.0004 mm/year, respectively, and the impedance modulus was increased by 1-2 orders of magnitude compared to that of APU-PDMS coating. This work combining 2D material with EB curing technology broadens the avenue for designing and fabricating composite coatings for metal corrosion protection.

High Efficient Construction and Comprehensive Evaluation of Superhydrophobic Filter Screen Coatings

The preparation of environment-friendly and efficient superhydrophobic filter screen still faces great challenges. Herein, a compact, solid cerium stearate superhydrophobic-coated stainless steel mesh (SSSM) was prepared by a simple, efficient, and environmentally friendly one-step electrodeposition process. Fourier transform infrared (FTIR) spectroscopy, energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), and contact angle measurement were used to characterize the surface coating (composition, morphology, and contact angle) of SSSM. The results show that the SSSM surface is a dense mastoid cerium stearate micronanostructure coating, and its static contact angle with water can reach 162.73°. In addition, it has excellent self-cleaning performance for conventional simulated pollutants, and the contact angle can still reach 161° after 28 days of storage. In the wear resistance and corrosion resistance tests, the contact angle can still be kept above 150° after 600 mm abrasion under the load of 19.6 kPa, the corrosion current of SSSM is reduced by two orders of magnitude, and its corrosion inhibition efficiency reaches 99.74%. In addition, the oil/water separation performance of SSSM is also very good, and the separation efficiency for different oil/water mixtures exceeds 97%. This study will provide important data support and method reference for the preparation of metal anticorrosion superhydrophobic material coating and the development of environment-friendly and efficient oil–water separation materials.

A pine needle-like superhydrophobic Zn/ZnO coating with excellent mechanochemical robustness and corrosion resistance

The superhydrophobic Zn-based coating with hierarchical structure has good prospects in metal anticorrosion. However, the practical application of superhydrophobic coating is still limited by the poor mechanical stability of micro/nano hierarchical structure. Herein, a robust superhydrophobic Zn/ZnO coating with pine needle-like structure and superior corrosion resistance was design and constructed. The micro-scale polyhedral Zn was fabricated on steel followed by the deposition of radially aligned ZnO nanorods, forming a novel pine needle-like hierarchical structure, which was finally modified by stearic acid. Notably, the pine needle-like structured Zn/ZnO (Zn/ZnO-3) coating exhibits excellent superhydrophobicity with contact angle of 166.8 ± 1.4° and sliding angle of 2.6 ± 0.5°. What's more, Zn/ZnO-3 coating maintains superhydrophobicity after suffering from strong acid/alkali, tape peeling, water drop impact and sandpaper abrasion tests. Compared with carbon steel and hydrophobic Zn coating, the corrosion current density of superhydrophobic Zn/ZnO-3 coating is decreased by approximately 4 and 3 orders of magnitude, respectively. The superior mechanochemical stability and anti-corrosion performance of superhydrophobic Zn/ZnO-3 coating is ascribed to its pine needle-like structure. Overall, this work provides a novel strategy to design hierarchical structured superhydrophobic surfaces with excellent mechanochemical stability and corrosion resistance, holding great prospects in metallic corrosion protection.

A Multi‐Layer Stacked Triboelectric Nanogenerator Based on a Rotation‐to‐Translation Mechanism for Fluid Energy Harvesting and Environmental Protection

AbstractEnergy shortage and environmental degradation are two important challenges facing humanity. Here, a multi‐layer stacked triboelectric nanogenerator (MLS‐TENG) based on a rotation‐to‐translation mechanism is reported for fluid energy harvesting and environmental protection. The mechanism transforms fluid‐induced rotation into a reciprocal translation of the MLS‐TENG, enabling the conversion of fluid energy into electrical energy. In addition, benefiting from a multi‐layer stacked structural design, the open‐circuit voltage is increased from 860 to 2410 V and an efficient energy harvesting rate of 2 mJ min−1 is obtained in an actual river. Furthermore, with the assistance of the MLS‐TENG, a self‐powered wireless temperature and humidity monitoring system and a metal anticorrosion system are successfully established. Ambient monitoring data can be transmitted continuously at an interval of 49.7 s, and the corrosion rate of steel is significantly slowed down. This study provides guidance for efficient harvesting of ambient fluid energy, with promising applications in environmental monitoring and protection.

Graphene-like two-dimensional nanosheets-based anticorrosive coatings: A review

• Prepartion of graphene-like 2D nanosheets are summarized in detail. • Surface functionalization of graphene-like 2D nanosheets are presented. • The anticorrosion performance, anticorrosive mechanism, and optimization measures of pure 2D nanosheets coatings and their composite coatings are reviewed. • Future development directions and challenges for graphene-like 2D nanosheets used for metal protection are proposed and discussed in detail. In recent years, graphene has been widely employed in the field of metal corrosion protection owing to its outstanding impermeability and chemical stability, with examples of such metal protection including pure graphene coatings and graphene-based composite coatings. But the conductive graphene could promote the electrochemical reaction at the interface and accelerate the corrosion of metal substrates. More emerging graphene-like 2D nanosheets are attracting research attention for the application of metal anticorrosion, because of their barrier properties and poor conductivity, mainly including boron nitride (BN), molybdenum disulfide (MoS 2 ), zirconium phosphate (ZrP), and titanium carbide (MXene). In this review, the application of these graphene-like 2D nanosheets to metal protection is comprehensively reviewed. First, the general preparation methods of 2D nanosheets are briefly introduced. Second, surface functionalization of 2D nanosheets, including covalent and non-covalent modification, is described in detail. Third, the anticorrosion performance and optimization measures of pure 2D nanosheets coatings are summarized. Next, the protection performance, anticorrosive mechanism, and optimizations of 2D nanosheets composite coatings are presented. Finally, the future development of 2D nanosheets-based anticorrosive coatings has been prospected, and the challenges in the industrial application are discussed.

Electrophoretic deposition of halloysite nanotubes/PVA composite coatings for corrosion protection of metals

The application of nanotechnology in the corrosion protection of metals has gained considerable attention. In this work, a fast, low-cost, and facial method of metal protection was proposed by electrophoretic deposition (EPD) of halloysite nanotubes (HNTs). EPD is a standard method to prepare dense homogeneous polymers gaining wide application. HNTs exhibiting unique nanostructure, high surface potentials, and good dispersion ability were used as the different metals' coating materials. The coating thickness can be precisely controlled by changing the electrophoretic deposition conditions (time, concentration, electrode spacing, and voltage). Coatings of 50 μm thickness were achieved at conditions of deposition time of 30 s, HNTs concentration of 4%, electrode spacing of 30 mm, and voltage of 20 V. The HNTs coating can be applied to complex shapes and different metal types. To increase the water resistance, glutaraldehyde crosslinked polyvinyl alcohol (PVA) was further introduced to the coating. PVA modification increased the corrosion resistance, wear resistance, and water resistance. The surface roughness increased with the deposition time, as evidenced by SEM and 3D optical profiler. When the deposition time was increased from 15 to 60 s, the RMS roughness of the coatings increased from 1.46 to 2.82 μm. HNTs/PVA composite coatings on metals are used for thermal insulation, information hiding, and anti-corrosion. When the deposition time increased from 15 to 60 s, the coating resistance changed from 13,446.0 to 27,015.0 Ω cm2. This work developed an assembled method of nanoclays on metals by EPD and polymer modification, which shows excellent potential in metal anti-corrosion.

Rational fabrication of fluorine-free, superhydrophobic, durable surface by one-step spray method

The role of superhydrophobic coating in metal anti-corrosion, oil leakage treatment, waterproofing and antifouling cannot be overstated, yet the application of conventional superhydrophobic coatings is limited due to their toxicity, poor mechanical stability, and high cost. Herein we report our design on an eco-friendly wax-derived organic-based superhydrophobic coating based on self-designed sol and eco-friendly wax and integrated the spray coating technique. The W-GPAC coating exhibits superhydrophobicity (Contact Angle: 170.6°, Sliding Angle: 5.3°) with a glass substrate. It should be noted that the coating could preserve excellent superhydrophobic property in water spray impact test (Contact Angle:160° after 500 water impact cycles), linear abrasion test(Contact Angle:160° after 120 cm linear abrasion), and acid-base durability test (Contact Angle: greater than 165° after immersion in the acidic or alkaline environment for 600 min). In addition, the coating maintains outstanding adhesion with various substrates even at freezing treatment. The superior performance of the coating comes from the folded structure formed by the drying of GPAC sol which is formed by the dense siloxane crosslinking network of GPAC sol and long-chain silane on the coating surface. Taken together, the W-GPAC superhydrophobic coating enjoys low manufacturing cost, easy degradability, and no secondary pollution, and can be applied to almost commonly used substrates with superior mechanical durability, which could provide alternative solution for superhydrophobic application.

Corrosion inhibition behavior of hydroxyl-terminated hyperbranched poly(amine-ester) for Q235 steel in HCl solution

Herein, we reported to use a hydroxyl-terminated poly(amine-ester) hyperbranched polymer (HPAE-OHs) as a green, effective and economic corrosion inhibitor for mild steel (Q235) in 1 M HCl solution. HPAE-OHs is a third generation hyperbranched polymer which can be synthesized through a simple “one-pot” solvent-free esterification. Weight-loss tests show that the presence of HPAE-OHs can inhibit the corrosion of Q235 and the corrosion inhibition efficiency (η (%)) can reach 94.9% at the dosage of 100 mg L−1 for 24 h. The study of the adsorption thermodynamic indicates that the adsorption of HPAE-OHs on the surface of Q235 steel follows Langmuir adsorption isotherm model. Polarization measurements and electrochemical impedance spectroscopy (EIS) suggest that HPAE-OHs works as a mixed-type inhibitor, which forms a layer of protective film on the metal surface to prevent metal corrosion. Moreover, theoretic studies further indicate that the corrosion inhibition is the result of the strong adsorption of HPAE-OHs inhibitor on Q235 steel surface. All these results clearly show that the synthesized hyperbranched polymer HPAE-OHs is an efficient corrosion inhibitor for steel and has a great application potential in industrial metal anticorrosion.