A Comparative Study on the Anti-Corrosive Performance of Zinc Phosphate in Powder Coatings

doi:10.3390/coatings12020217

IMR OpenIR

	A Comparative Study on the Anti-Corrosive Performance of Zinc Phosphate in Powder Coatings
	Yang, Shuai (Marshall)1; Huang, Jinbao 1; Chen, Jian 2,3; Noel, James Joseph 2; Barker, Ivan 4; Henderson, Jeffrey Daniel 4; He, Ping 5; Zhang, Haiping 6; Zhang, Hui 1; Zhu, Jesse 1
通讯作者	Zhang, Hui(hzhang1@uwo.ca)
	2022-02-01
发表期刊	COATINGS
卷号	12 期号:2 页码:17
摘要	Powder coatings are gaining popularity for their economic and environmental benefits. Additives (pigments) such as zinc phosphate enhance the anti-corrosive properties of coatings, but their behavior in powder coatings has not been extensively studied. In this study, zinc phosphate was incorporated into three powder coating systems: polyester clearcoat, polyester and epoxy coatings with filler BaSO4. Neutral salt spray and electrochemical tests (OCP, LPR, and EIS) confirmed that the anti-corrosive performance improved with the addition of zinc phosphate. The optimal additive dosage was determined to be 2% for all of the coating systems studied here, based on salt spray tests. Here, the time until failure increased by 1.5 to 2 times. Using electrochemical tests, an optimal additive dosage of 8% was found for the polyester clearcoat, while the other coating systems maintained an optimal additive dosage of 2%. Performance increased by as much as one order of magnitude based on resistance/impedance measurements. This suggested a synergistic effect between the additive and the filler. The passivation layer was confirmed by both X-ray diffraction and Raman spectroscopy. Based on the results and discussion presented in this article, the discrepancy was caused by different features of the two tests, such that the electrochemical tests probe the function of intact coatings, whereas salt spray measures only the corrosion spreading from the scribe. It is proposed that the two test methods characterize different aspects of the coatings, corresponding to their service conditions. This has theoretical and practical significance in the evaluation of anti-corrosive coatings. Other properties of the coatings, including adhesion, gloss, distinctness-of-image, and pencil hardness, were measured as per applicable standards and the conformance was verified.
关键词	powder coatings anti-corrosive zinc phosphate additive pigment filler EIS electrochemical impedance spectroscopy
资助者	Natural Sciences and Engineering Research Council of Canada (NSERC) ; NSERC Discovery Grant
DOI	10.3390/coatings12020217
收录类别	SCI
语种	英语
资助项目	Natural Sciences and Engineering Research Council of Canada (NSERC)[RGPIN-2018-06256] ; NSERC Discovery Grant[RGPIN-2018-06672]
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Materials Science, Coatings & Films ; Physics, Applied
WOS记录号	WOS:000763664000001
出版者	MDPI
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/173395
专题	中国科学院金属研究所
通讯作者	Zhang, Hui
作者单位	1.Western Univ, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada 2.Western Univ, Dept Chem, London, ON N6A 5B7, Canada 3.Chinese Acad Sci, Inst Met Res, Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 4.Western Univ, Surface Sci Western, London, ON N6G 0J3, Canada 5.Southwest Univ Sci & Technol, Sch Mat Sci & Engn, Mianyang 621010, Sichuan, Peoples R China 6.Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shuai ,Huang, Jinbao,Chen, Jian,et al. A Comparative Study on the Anti-Corrosive Performance of Zinc Phosphate in Powder Coatings[J]. COATINGS,2022,12(2):17.
APA	Yang, Shuai .,Huang, Jinbao.,Chen, Jian.,Noel, James Joseph.,Barker, Ivan.,...&Zhu, Jesse.(2022).A Comparative Study on the Anti-Corrosive Performance of Zinc Phosphate in Powder Coatings.COATINGS,12(2),17.
MLA	Yang, Shuai ,et al."A Comparative Study on the Anti-Corrosive Performance of Zinc Phosphate in Powder Coatings".COATINGS 12.2(2022):17.