Article
Chemistry, Applied
Chunping Qi, Kim Dam-Johansen, Claus Erik Weinell, Huichao Bi, Hao Wu
Summary: The study showed that the partial replacement of spherical zinc particles with stainless steel flakes (SSF) improved the corrosion protection performance of zinc-rich epoxy (ZRE) coating. This enhancement was attributed to the synergistic effects of increasing coating impedance and extending cathodic protection duration.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Applied
Ziyou Li, Giulia Ravenni, Huichao Bi, Claus Erik Weinell, Burak Ulusoy, Yanqiang Zhang, Kim Dam-Johansen
Summary: The study demonstrated that biochar nanoparticles can be utilized to enhance the anticorrosive performance of zinc-rich epoxy coatings, with the example of spruce wood BCN showing even better effectiveness compared to commercial carbon black.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Applied
Wei Sun, Chao Xing, Xiaobo Tang, Yu Zuo, Yuming Tang, Xuhui Zhao
Summary: This study investigated the degradation of a zinc-rich epoxy primer/acrylic polyurethane coating system on carbon steel in different simulated atmospheric solutions. The degradation speed was found to be fastest in the simulated marine atmosphere. The presence of soluble contaminants in the atmospheres, as well as factors like water permeation rate and corrosion products, were found to influence the degradation process.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Xiao Lv, Xuliang Jin, Zongxuan Zhang, Yuxing Bai, Tingting Guo, Li Zhang, Hui Zhang, Jesse Zhu, Yuanyuan Shao, Haiping Zhang, Bin Yuan, Aiming Yin, Jinfeng Nie, Fan Cao, Zhengjun Xu
Summary: Zinc-rich primers are a promising coating system for improving the corrosion resistance of metals in marine environments. This study investigates the effects of different conductive additives on the anticorrosion performance of epoxy zinc-rich primer. Results suggest that the formula with 2 wt.% carbon black and 67 wt.% zinc dust shows the most promising anticorrosion properties.
Article
Materials Science, Multidisciplinary
Chao Yang, Qing Han, Haibo Liu, Yuanyuan Wang, Yanfeng Liu, Shupeng Yao
Summary: The failure mechanism of Zn-rich epoxy coating under AC interference in alkaline environment was revealed through EIS tests. Zn reacted with O-2 during the curing process, forming ZnO-Zn structure. AC interference inhibited the activation process of Zn particles, but significantly promoted the electrochemical reaction process. Non-conductive Zn(OH)2 generated under AC interference isolated the electrical connection between activated Zn particles and cut off cathodic protection between Zn and Fe, leading to coating stripping.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Materials Science, Multidisciplinary
Yuxing Bai, Xuliang Jin, Junqing Xie, Xiao Lv, Tingting Guo, Li Zhang, Jesse Zhu, Yuanyuan Shao, Haiping Zhang, Hui Zhang, Bin Yuan, Aiming Yin, Jinfeng Nie, Fan Cao, Zhengjun Xu
Summary: This study deposited PPy on SCP surfaces and applied the prepared PPy/SCP conductive additive on ZRP coatings, discussing the effects of different substitution methods on corrosion resistance, with the equal volume substitution method showing advantages.
Article
Chemistry, Applied
Ziyou Li, Huichao Bi, Claus Erik Weinell, Giulia Ravenni, Lidia Benedini, Kim Dam-Johansen
Summary: Pyrolyzed and gasified biochar nanoparticles (BCN) were incorporated into zinc epoxy coatings to enhance their barrier protection and zinc utilization rate. The BCN-modified formulations showed improved anticorrosive performance, especially on formulations with lower zinc content. The enhanced performance was attributed to the filling of micropores and extra electrical connections provided by BCN. This study provides a sustainable solution for enhancing the anticorrosive performance of zinc epoxy coatings.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Applied
Xiao Wang, Xuan Liang, Bo Wang, Chang-qing Guo, Shan-gui Zhang, Kai Yang, Shi-ya Shao, Yan Sun, Zheng Guo, Xue-yan Yu, Donghai Zhang, Tai-jiang Gui, Wei Lu, Ming-liang Sun, Rui Ding
Summary: This study evaluates the effect of graphene, basalt flakes, and their synergy on the corrosion resistance of zinc-rich coatings. The addition of a small amount of graphene and basalt flakes significantly improves the anticorrosion performance of coatings by enhancing their shielding ability against corrosive media. The modified coatings exhibit higher water resistance, salt water resistance, and salt spray resistance.
PIGMENT & RESIN TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Zhang, Teng Zhang, Yuting He, Sheng Zhang, Binlin Ma, Zhigang Gao
Summary: Long-term atmospheric exposure tests on epoxy primer-coated aluminum alloy in a coastal environment showed that different durations of exposure resulted in a normal distribution of contact angles, with Al(OH)(3) as the corrosion product after 20 years, indicating intergranular and exfoliation corrosion. The impedances of the coatings decreased significantly after long-term exposure, with the substrate showing signs of corrosion after 20 years. The study also analyzed the corrosion mechanism and electrochemical equivalent circuit.
Article
Chemistry, Applied
Chao Xing, Wei Wang, Shuai Qu, Yuming Tang, Xuhui Zhao, Yu Zuo
Summary: The study found that the epoxy zinc-rich coating initially provides effective cathodic protection to the steel substrate, but still offers some protection when zinc corrosion products begin to dominate. The conductivity and activity of zinc particles lead to lower values of resistance and capacitance in the coatings, but rust spots appear on the coating surface when these values decrease to a certain level. A reference criterion for failure of about 5 x 10(4) omega cm(2) is suggested for the zinc-rich epoxy coatings, which differs from the one reported for typical organic coatings without conductive particles.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2021)
Article
Engineering, Mechanical
Zhang Tianyu, Zhang Teng, He Yuting, Du Xu, Zhang Sheng
Summary: The study showed that under UVA-acidic alternating-immersion, the residual thickness of the epoxy primer on aluminum alloys decreases linearly, and the impedance of the coated specimens changes differently in the three environments, influenced by various factors. The degradation mechanisms and electrochemical equivalent circuits were analyzed at different stages of the aging process.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Applied
Yingying Zhang, Liangyong Chu, Zhisheng Dai, Ningzhong Bao, Matthijn B. de Rooij, Ling Gao, Weimin Tan, Liming Shen
Summary: In this study, a new anti-corrosion composite coating was prepared with high anti-corrosion performance achieved by enhancing matrix compactness, filler dispersibility, and matrix hydrophobicity synergistically.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Physical
Sarah B. Ulaeto, Gincy Marina Mathew, Jerin K. Pancrecious, P. R. Rajimol, Akhil S. Karun, T. P. D. Rajan
Summary: This study investigated the active anticorrosion performance of epoxy coatings containing encapsulated crude vegetal extracts of Azadirachta indica leaves to protect aluminum alloy 6061 in seawater. The hybrid coatings exhibited better anticorrosion via extrinsic self-healing in alkaline chloride solution.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Applied
E. Alibakhshi, S. A. Haddadi, A. Labbani Motlagh, M. Ghaderi, B. Ramezanzadeh, M. Mahdavian, M. Arjmand, M. Jalili
Summary: A high-performance epoxy nanocomposite with dual active/barrier protection ability based on calcium zinc phosphate (CZP) nanopigment was fabricated and compared with commercial zinc phosphate (ZP). The CZP nanopigment exhibited higher corrosion inhibition compared to ZP. Various analysis techniques confirmed the reinforcement effects of CZP on the corrosion resistance of epoxy composites.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Applied
Kingsley Lau, Samanbar Permeh
Summary: The three-coat system is widely used for corrosion protection of steel bridges. The electrochemical noise technique can be used to evaluate the corrosion performance of coatings and identify the activation and passive transition of zinc pigments. It reflects the barrier quality of intact coatings and the behavior of the zinc/steel interface.
PROGRESS IN ORGANIC COATINGS
(2022)
