CORROSION SCIENCE
·
2024
·
IF 7.4
Teng Xu,Lei Yu,Ji-Ming Hu
Zn-Al layered double hydroxide (LDH) pretreatment layer was prepared by a novel two-step electrochemical method on galvanized steel surface from a precursor solution containing Al 3+ -only. In the first step, anodic currents are applied to Zn deposit to produce Zn 2+ in solution near the substrate surface. Cathodic currents are then applied to ensure the cathodic deposition of LDH film. The obtained LDH coatings not only provide excellent adhesion to the metal surface, but also enhance the adhesion between metal substrate and the top epoxy coatings. The “LDH/epoxy” painting system can protect galvanized steel from rusting for at least 150 days.
研究领域:
材料科学
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电化学
·
表面工程
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产品关联
DOI
高影响因子
Materials
·
2020
·Vol. 13
·期 10
·2340
·
IF 3.057
Yongzhe Fan,Huazhen Yang,Haisheng Fan,Qi Liu,Chuang Lv,Xue Zhao,Mingxu Yang,Jianjun Wu,Xiaoming Cao
The hexagonal boron nitride (h-BN) nanosheets modified by silane coupling agent (KH560) were doped into acrylic acid coating on the surface of galvanized steel to improve its corrosion resistance. H-BN nanosheets modified by KH560 were prepared and characterised by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy. The corrosion resistance of the acrylic acid coatings was measured by electrochemical testing. The results show that the corrosion current density of the coating with modified h-BN nanosheets was reduced from 2.2 × 10−5A/cm2to 2.3 × 10−7A/cm2compared with the acrylic acid coating. The impedance of the composite coating with modified h-BN is 4435 Ω·cm2, higher than the BNNS coating (2500 Ω·cm2) and the acrylic acid coating (1500 Ω·cm2). This is due to the physical barrier and electrical insulation properties of the hexagonal boron nitride (h-BN) nanosheets.Keywords:hot-dip galvanized steel;boron nitride nanosheet;corrosion resistance;acrylic coating
研究领域:
材料科学
·
腐蚀与防护
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Yunlong Sang,Qi Liu,Shengxing Wang,Shuhan Dong,Yongzhe Fan,Xue Zhao,Shijie Li
Polyaniline (PANI) was covalently linked with hexagonal boron nitride (BN) using p-aminobenzoic acid (ABA) to obtain a PANI-BN powder. The PANI-BN/EP coating was applied on hot-dip galvanized steel, which exhibited remarkable corrosion resistance. Electrochemical test results showed that the impedance modulus in the low-frequency region of PANI-BN/EP was maximum after soaking in NaCl solution (3.5 wt.%) for 72 h compared with other coatings. The outstanding corrosion resistance of the PANI-BN/EP coating was primarily attributed to the synergistic effect of BN and PANI.
研究领域:
材料科学
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防腐蚀工程
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化学工程
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产品关联
DOI
高影响因子
CORROSION REVIEWS
·
2023
·Vol. 41
·期 2
·225-235
·
IF 3.2
Zhenkai Xu,Lian Chen,Jingliang Han,Chengfei Zhu
Sodium molybdate (Na 2 MoO 4 ) was selected as the corrosion inhibitor, compounded with benzimidazole, in order to prolong the service life of the hot-dip galvanized steel (HDGS) in the marine environment in this article. XRD, SEM/FESEM and EDS were used to characterize the micro-morphology and elemental composition of HDGS. Immersion corrosion test, Tafel polarization and EIS test were carried out to study the effect of compound inhibitor on the corrosion resistance of HDGS in the marine environment. The best proportion of compound inhibitor was added to the self-made waterborne polyurethane coating (WPUC), aiming to evaluate its influence on the coating performance in the marine environment by immersion corrosion test and EIS test. The results showed that Na 2 MoO 4 , as a passivation type corrosion inhibitor, bounded Zn at the active sites of HDGS coupons and created structural defects. Benzimidazole, as an adsorption type corrosion inhibitor, was attracted by electricity and adsorbed at the structural defects. Under the premise of 1 wt% total content, the optimal ratio of Na 2 MoO 4 & benzimidazole was 9:1 and the corrosion inhibition efficiency was 99.62%. The corrosion current density of HDGS in the simulated seawater with compound inhibitor was 5.650 × 10 −8 A/cm 2 , while that of HDGS in the simulated seawater without compound inhibitor was 1.483 × 10 −5 A/cm 2 . The WPUC containing compound inhibitor had a small decrease in corrosion resistance due to defects created by doping at the beginning of immersion, then the compound inhibitor would play an active role in the corrosion process to make more than double the service life of WPUC.
研究领域:
材料科学
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腐蚀与防护
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2023
·Vol. 97
·期 9
·2044-2051
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IF 0.7
Xu Zhenkai,Chen Lian,Han Jingliang,Zhu Chengfei
Abstract Galvanized steel is one of the commonly used material in the field of corrosion protection, but it’s prone to corrosion in heavily corrosive environments. Hence, the Hot-Dip Aluminized-Galvanized Steel (HDAGS) was developed, which is less susceptible to corrosion, by adding aluminum to the galvanizing solution. But in marine environment, the HDAGS still requires further protection. In this article, the effect of nine common corrosion inhibitors on HDAGS was evaluated by Immersion corrosion test, Tafel polarization, EIS test, XRD, SEM&EDS firstly. The results showed that the adsorbed film inhibitors and the deposited film inhibitors were effective, but the oxidized film inhibitors were not ideal because the Al–Zn coating was hard to oxidize. The corrosion rate of HDAGS in simulated seawater containing 1 wt % zinc phosphate was 3.333 × 10 –7 g/(m 2 h), while it was 6.072 × 10 –4 g/(m 2 h) in simulated seawater without inhibitor, and the inhibition efficiency was 99.94%. Three most effective inhibitors were then added to the waterborne polyurethane coating (WPUC) for HDAGS, and the performance was evaluated by EIS and Immersion corrosion test. The impedance of WPUC containing inhibitors all decreased fast at the beginning of immersion. The subsequent action of the corrosion inhibitor in the corrosion process extended the service life of WPUC by 2–3 times.
研究领域:
材料科学
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腐蚀与防护
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表面工程
✓ 已验证
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
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2021
·Vol. 16
·期 6
·e2702
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IF 1.447
Shiyuan Xiong,Xiaole Huang,Wennian Xu,Xiaoping Guo,Shuan Liu
In previous work, the corrosion performance and anti-corrosion mechanism of galvanized steel wire embedded in vegetation-growing concrete under marine environment was highlighted. In this work, a graphene-modified epoxy coating was developed and applied to the protection of galvanized steel in vegetation-growing concrete under a marine environment. The effect of dispersed graphene on the anticorrosion performance of the epoxy coatings was evaluated. The composite coatings displayed outstanding barrier properties against H 2 O molecules compared to the pure epoxy coating. Salt spray test results revealed superior corrosion resistance offered by the prepared graphene-modified epoxy coating on galvanized steel.
研究领域:
材料科学
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腐蚀与防护
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土木工程材料
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复合材料
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环境耐久性
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Kousuo Dong,Linsheng Bian,Yuchen Liu,Zisheng Guan
The excellent wetting resistance properties of superhydrophobic materials mean that they have a wide range of potential applications. However, there are problems that need to be solved urgently regarding mechanical stability, corrosion resistance and complex synthesis. Herein, we prepared a robust and durable superhydrophobic coating using an inorganic aluminum phosphate (AP) adhesive. This contained organic polydimethylsiloxane (PDMS) and silica/halloysite composite nanotubes (HNTs) modified with 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDTES). The as-prepared F-SiO 2 /HNTs-AP@PDMS coating shows good superhydrophobicity (water contact angle = 158°), mechanical strength and durability. Superhydrophobicity was maintained even after 150 complete sandpaper wear cycles and 200,000 water droplet impact measurements. In particular, electrochemical impedance spectroscopy (EIS) results showed that the R ct value of the superhydrophobic coating was significantly increased by five orders of magnitude. After exposure to a corrosive environment for 10 days, the R ct value is still far higher than that of uncoated galvanized steel , indicating that it provides excellent long-term protection for metals. We believe this work not only provides a reference for the large-scale preparation of superhydrophobic materials, but also provides a strategy for the long-term protection of galvanized steel.
研究领域:
材料科学
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表面工程
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防腐蚀技术
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产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Qi Liu,Xiaoran Zhang,Yunlong Sang,An Du,Ruina Ma,Xue Zhao,Yongzhe Fan,Xiaoming Cao
Graphene oxide (GO) was modified by a novel octa-(aminopropyl) polyhedral oligomeric silsesquioxane (OA-POSS) to improve its dispersion in a waterborne matrix. The modified GO was incorporated into preparing an eco-friendly conversion coating for the hot-dip galvanized layer. The compositions of the conversion coatings were unaffected by the presence of the mGO, but surface defects were modified. The corrosion current density was decreased to 6.50 × 10 −5 A/cm 2 and the corrosion rate was reduced to 9.69 mm/year by modified GO incorporation. Increased resistances to charge transfer and mass diffusion at one order of magnitude were also obtained. Moreover, the adhesion strength of the as-prepared conversion coating was improved 70% after the mGO addition, which effectively inhibited topcoat exfoliation.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zeyu Huang,Hao Li,Yuhua Xiao,Qinhao Zhang,Pan Liu,Liankui Wu,Fahe Cao
Ensuring the long-term durability and safety of galvanized steel structures in industrial and environmental applications requires a deep understanding of their corrosion resistance, particularly at defects such as cut edges and scratches. These sites often initiate localized corrosion due to micro-environmental inhomogeneities. This study investigates the dynamic corrosion behavior of galvanized Zn/Q235 steel couples by integrating macro-electrochemical testing with in-situ high-resolution scanning electrochemical microscopy (SECM) to reveal the underlying interfacial physicochemical mechanisms. While macro-electrochemical measurements indicated significant passivation, with the corrosion current density decreasing by over an order of magnitude to 1.00 × 10⁻ 6 A·cm⁻ 2 after 24 h, micro-scale SECM mapping revealed a more complex mechanism. As corrosion progressed, oxygen reduction reactions became increasingly concentrated at the Zn/Q235 interface, where localized pH stabilized near 8. This remarkable pH buffering is attributed to the continuous precipitation of zinc corrosion products, an interfacial process that consumes both Zn 2+ and OH⁻ to form a passivating layer. At simulated scratch defects, an initially aggressive galvanic coupling with steep pH gradients was gradually suppressed as these precipitates formed, demonstrating a self-passivation effect. These findings elucidate a locally driven, interfacial chemical buffering mechanism, governed by precipitate formation, that controls passive film development and slows degradation. The results establish direct links between interfacial pH regulation, corrosion-product formation, and self-passivation at defects, advancing the interface science underpinning environmentally resilient galvanized coatings.
研究领域:
腐蚀科学
·
电化学
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材料科学
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表面化学
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材料环境退化
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Zhichun Cui,Jianzhong Li,Donghai Qiu,Wenhu Yang,Zhiying Zhang
The mechanism of residual internal stress on the growth and corrosion resistance of phosphate conversion coating (PCC) on hot-dip galvanized (HDG) steel sheets was investigated by finite element analysis , electrochemical tests, scanning electron microscopy (SEM), and coating weight experiments. The results indicate that residual compressive stress inhibits the electrochemical activity of HDG steel sheets. The formation of PCC is also restrained. Residual tensile stress can effectively enhance the electrochemical activity of the substrate, and as the residual tensile stress increased, the cathodic reaction rate of the substrate was increased. In particular, when the residual tensile stress value was 221.0 MPa, PCC grew completely on the surface of the substrate and showed excellent corrosion resistance. When the residual tensile stress reached 261.8 MPa, the fast micro-cathode reaction rate led to the formation of a large number of PCC crystal nuclei, which covered the active site of the substrate and inhibited the further occurrence of the coating formation reaction. The corrosion resistance of the PCC also decreased at this time.
研究领域:
材料科学
·
腐蚀工程
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）