Flake-like ZnAl alloy powder modified waterborne epoxy coatings with enhanced corrosion resistance

doi:10.1016/j.porgcoat.2022.107367

IOCAS-IR

	Flake-like ZnAl alloy powder modified waterborne epoxy coatings with enhanced corrosion resistance
	Zhang, Jiajia 1,2,3; Zhu, Qingjun 2,3,4; Wang, Zhiyi 1,2; Wang, Xin 2,3; Yan, Jiayang 2,3
	2023-02-01
发表期刊	PROGRESS IN ORGANIC COATINGS
ISSN	0300-9440
卷号	175 页码:10
通讯作者	Zhu, Qingjun(zhuqingjun@qdio.ac.cn) ; Wang, Zhiyi(wangzhiyi@qust.edu.cn)
摘要	Zinc-rich epoxy coatings (ZRECs) have been widely used to protect steel against corrosion because of their excellent corrosion resistance. However, the ZRECs preparation usually used a large amount of Zn powders and organic solvents, which not only wasted resources but also produced a great quantity of volatile organic compounds (VOC). Therefore, it was necessary to develop a method which can prepare epoxy coatings with low Zn content, great corrosion resistance and green environmental protection. In this paper, three different flake metal powders (Zn, ZnAl alloy and ZnAlMg alloy) were used to replace spherical Zn powders to develop environmentally friendly coatings with low pigment content. The coatings were evaluated by salt spray test and electrochemical test. The results show that the use of flake metal powders instead of spherical zinc pigments can enhance the electrical connection between metal particles, prolong the path of corrosive medium infiltration into the coatings, enhance the physical shielding effect of the coatings, and reduce the pigment content by one third. Among them, the ZnAl coatings displayed the best anti-corrosion performance resisting salt fog corrosion for 28 days. In addition, the experimental results show that the self-healing ability of the coatings also plays an important role in the immersion middle and late stages. In short, the waterborne epoxy ZnAl coatings are suitable for large-scale application in harsh environments.
关键词	Zinc-rich epoxy coatings ZnAl ZnAlMg Corrosion protection Waterborne coatings
DOI	10.1016/j.porgcoat.2022.107367
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Applied ; Materials Science, Coatings & Films
WOS记录号	WOS:000912398700001
出版者	ELSEVIER SCIENCE SA
WOS关键词	SEA-WATER ; ZINC ; PROTECTION ; OXIDE ; ALUMINUM ; GRAPHENE ; PRODUCTS ; STEEL
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/183303
专题	中国科学院海洋研究所
通讯作者	Zhu, Qingjun; Wang, Zhiyi
作者单位	1.Qingdao Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266042, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, Qingdao 266237, Peoples R China 4.Inst Oceanol, Chinese Acad Sci, Key Lab Marine Environm Corros & Biofouling, 7 Nanhai Rd, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhang, Jiajia,Zhu, Qingjun,Wang, Zhiyi,et al. Flake-like ZnAl alloy powder modified waterborne epoxy coatings with enhanced corrosion resistance[J]. PROGRESS IN ORGANIC COATINGS,2023,175:10.
APA	Zhang, Jiajia,Zhu, Qingjun,Wang, Zhiyi,Wang, Xin,&Yan, Jiayang.(2023).Flake-like ZnAl alloy powder modified waterborne epoxy coatings with enhanced corrosion resistance.PROGRESS IN ORGANIC COATINGS,175,10.
MLA	Zhang, Jiajia,et al."Flake-like ZnAl alloy powder modified waterborne epoxy coatings with enhanced corrosion resistance".PROGRESS IN ORGANIC COATINGS 175(2023):10.