Article
Chemistry, Physical
Jithu Jayaraj, A. Srinivasan, C. Arunchandran, V. Rajinikanth
Summary: This study proposes a two-stage chemical conversion coating process for magnesium alloys. The results show that the water-based coating has self-healing characteristics, while the ethanol-based coating has better corrosion resistance. Both coatings exhibit acceptable cell viability under physiological conditions.
APPLIED SURFACE SCIENCE
(2024)
Article
Materials Science, Coatings & Films
Kang-qing Zuo, Zhi-yuan Gong, Gui-yong Xiao, Sheng-yun Huang, Chun-miao Du, Bing Liu, Dong-sheng Zhang, Yu-peng Lu
Summary: The microstructure of the phosphate coating on implant surface can be regulated by adjusting the Zn2+ concentration in the phosphate solution, leading to the evolution of crystal morphology from irregular granules to regular cubic blocks. The increase in Zn2+ concentration also results in an improvement in coating thickness, wettability and corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Reghuraj Aruvathottil Rajan, Kaiprappady Kunchu Saju, Ritwik Aravindakshan
Summary: This study reported the development of an optimal parametric low reflective magnetite coating on stainless steel surface and its bioactivity studies. Process parameters were optimized using Taguchi optimization techniques, and analysis was conducted using XPS and SEM.
Article
Materials Science, Multidisciplinary
Yinghai Zhao, Wei Li, Zhenwen Wang, Ning Li, Yanling Xu, Deyu Li
Summary: In recent years, there has been a trend in the tinplate production field to use lower tin coating mass to reduce costs. However, this approach faces two significant challenges: toxic chromate post-treatment and low corrosion resistance. In this study, we developed a Mn-Al-P chemical conversion coating as an alternative to chromate treatment, with a process-adjusted tinplate of 0.5 g/m(2) tin coating mass. By adjusting the reflowing and post-treatment processes, we were able to effectively reduce water and electricity consumption while improving corrosion resistance.
Article
Metallurgy & Metallurgical Engineering
Mohan Sathyaraj, K. Ravichandran, Sankara Narayanan
Summary: This study aims to prevent excessive dissolution of magnesium by forming a fluoride conversion coating as a pre-treatment, followed by deposition of magnesium phosphate coating to develop a magnesium fluoride-magnesium phosphate duplex coating. The results of the study demonstrate that the magnesium fluoride-magnesium phosphate duplex coating can significantly improve corrosion resistance and enhance the bioactivity of magnesium.
JOURNAL OF MAGNESIUM AND ALLOYS
(2022)
Article
Biochemistry & Molecular Biology
Guochao Gu, Yibo Li, Kangqing Zuo, Guiyong Xiao
Summary: Strontium phosphate conversion coatings on titanium can improve its biological properties and corrosion resistance. The composition, morphology, and corrosion resistance of the coatings vary according to the pH values of the conversion solution. The coatings enhance adhesion and differentiation of BMSCs.
Article
Chemistry, Applied
Xinchen Han, Ning Li, Bo Wu, Deyu Li, Qinmin Pan, Rui Wang
Summary: Chromate-phosphate/water-soluble resin composite conversion coatings (CP/RC) were prepared on aluminum surfaces using a non-washing, dip coating-baking chemical conversion treatment. The resulting CP/RC surface showed the most homogeneous structure with the strongest protection against aluminum and was not corroded in salt spray and immersion tests.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
Asma A. Ali, Metwally Madkour, Fakhreia Al Sagheer, Ahmed Abdel Nazeer
Summary: The lath-like structure of Al2O3 was successfully synthesized and applied to the surface of stainless steel(SS). The rGO/Al2O3-PVDF coating with 1% Al2O3 showed excellent corrosion resistance for SS, outperforming other coatings.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Zhichun Cui, Jianzhong Li, Donghai Qiu, Wenhu Yang, Zhiying Zhang
Summary: The mechanism of residual internal stress on the growth and corrosion resistance of phosphate conversion coating on hot-dip galvanized steel sheets was investigated. Residual compressive stress inhibits the electrochemical activity and formation of the coating, while residual tensile stress enhances the electrochemical activity of the substrate. However, excessive tensile stress hinders coating formation and decreases corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
A. H. Riyas, C. V. Geethanjali, S. Arathy, Anaswara Anil, S. M. A. Shibli
Summary: In this study, Al2O3/Mo composite incorporated zinc phosphate coatings were developed on galvanized steel. The tuned composition of Al2O3/Mo composite in the phosphating solution effectively improved the corrosion-resistant characteristics and tribological performance of the coating. By adjusting the concentration of the composite, a more compact, homogeneous, and dense zinc phosphate crystal growth and coverage were achieved on the galvanized steel surface, leading to enhanced corrosion-resistant performance. The distribution of the composite particles was uniform, and the surface roughness was reduced, contributing to better anti-corrosion properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Kosar Nazarzade, Reza Naderi, Mohammad Mahdavian
Summary: In this work, a novel method was used to synthesize a conversion coating (CC) called zeolitic imidazolate framework-8 (ZIF-8), which was applied to a galvanized surface. The ZIF-8 conversion coating was successfully synthesized after 6 hours using a reverse pulse electrodeposition method. The hydrophilicity of the coating was increased, as demonstrated by the contact angle test. Among the different samples, ZIF-8CC@6 h showed the best performance against corrosion.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Trong-Linh Nguyen, Tsung-Chieh Cheng, Jung-Yen Yang, Chun-Jern Pan, Tzu-Hsiang Lin
Summary: A zinc-manganese composite phosphate conversion coating (Zn-Mn PCC) was deposited on the AZ91D alloy to improve its corrosion resistance. The growth mechanism and characteristics of the Zn-Mn PCC were investigated by varying the ZnO content in the phosphate bath and the phosphating time. The results showed that the coating had different structure types and its coverage, thickness, and hydrophobicity increased with higher ZnO content. Furthermore, the corrosion resistance of the Zn-Mn PCC was significantly enhanced by adding 4 g/L of ZnO into the phosphate bath.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Coatings & Films
Thu Thuy Pham, Thuy Duong Nguyen, Anh Son Nguyen, Yoann Paint, Maurice Gonon, Thi Xuan Hang To, Marie-Georges Olivier
Summary: This study investigated the dissimilarities of ZnAl hydrotalcite conversion films on electrogalvanized steel with different Al3+/Zn2+ ratios. It was found that as the Al3+/Zn2+ ratio decreased, the inhibition efficiency of the ZnAl-HT conversion films increased, but eventually decreased at certain ratios, while remaining stable at higher ratios for longer immersion times. The protection performance of the ZnAl-HT films was attributed to barrier effects, ion-exchange competitive adsorption of chloride ions, and protective deposition of ZnO on the steel surface.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Engineering, Biomedical
Da-Wang Zhao, Chun-Miao Du, Kang-Qing Zuo, Yi-Xiang Zhao, Xiao-Qian Xu, Yi-Bo Li, Shuai Tian, Hong-Ru Yang, Yu-Peng Lu, Lei Cheng, Gui-Yong Xiao
Summary: Zinc alloys are a new generation material for orthopedic applications due to their physiological effects and degradation properties. However, excessive release of zinc ions during degradation and the inflammatory microenvironment hinder osseointegration. Therefore, it is crucial to modulate the release rate of zinc alloys and give them anti-inflammatory and osteogenic effects through surface modification technology.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Peng Zhou, Baoxing Yu, Yaojun Hou, Guoqing Duan, Lixin Yang, Bo Zhang, Tao Zhang, Fuhui Wang
Summary: The study revealed various forms of defects within the conversion coatings, with cracks originating from the metal/coating interface, leading to the proposal of an entrapped hydrogen-induced coating cracking mechanism and potential solutions.
