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铋和锡对锌-铝镍镀液中获得的锌涂层微观结构和耐腐蚀性的影响

Impact of Bi and Sn on Microstructure and Corrosion Resistance of Zinc Coatings Obtained in Zn-AlNi Bath.

作者信息

Kania Henryk, Saternus Mariola, Kudláček Jan

机构信息

Department of Advanced Materials and Technology, Faculty of Engineering Materials, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland.

Department of Metallurgy and Recycling, Faculty of Engineering Materials, Silesian University of Technology, Krasińskiego 8, 40-019 Katowice, Poland.

出版信息

Materials (Basel). 2020 Aug 27;13(17):3788. doi: 10.3390/ma13173788.

DOI:10.3390/ma13173788
PMID:32867299
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7503808/
Abstract

The paper presents results of studies on the impact of bismuth and tin additions to the Zn-AlNi bath on microstructure and corrosion resistance of hot dip galvanizig coatings. The structure at high magnifications on the top surface and cross-section of coatings received in the Zn-AlNiBiSn bath was revealed and the microanalysis EDS (energy dispersion spectroscopy) of chemical composition was determined. The corrosion resistance of the coatings was tested relatively in a neutral salt spray test (NSS), and tests in a humid atmosphere containing SO. Electrochemical parameters of coatings corrosion were determined. It was found that Zn-AlNiBiSn coatings show lower corrosion resistance in comparison with the coatings received in the Zn-AlNi bath without Sn and Bi alloying additions. Structural research has shown the existence of precipitations of Sn-Bi alloy in the coating. It was found that Sn-Bi precipitations have more electropositive potential in relation to zinc, which promotes the formation of additional corrosion cells.

摘要

本文介绍了向Zn-AlNi镀液中添加铋和锡对热浸镀锌涂层微观结构和耐蚀性影响的研究结果。揭示了在Zn-AlNiBiSn镀液中获得的涂层顶面和横截面在高倍放大下的结构，并通过能谱分析（EDS）确定了化学成分的微观分析。通过中性盐雾试验（NSS）对涂层的耐蚀性进行了相对测试，并在含有SO的潮湿气氛中进行了测试。测定了涂层腐蚀的电化学参数。结果发现，与未添加锡和铋合金的Zn-AlNi镀液中获得的涂层相比，Zn-AlNiBiSn涂层的耐蚀性较低。结构研究表明涂层中存在Sn-Bi合金沉淀。研究发现，Sn-Bi沉淀相对于锌具有更正的电位，这促进了额外腐蚀电池的形成。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/4b288603d49c/materials-13-03788-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/af685815851d/materials-13-03788-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/67ef1c88d3ea/materials-13-03788-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/9de019bec097/materials-13-03788-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/d8c1c1017aa3/materials-13-03788-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/1ca6c6c5ae2f/materials-13-03788-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/54d929e9dbea/materials-13-03788-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/51f64e8468e3/materials-13-03788-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/975a33a21fed/materials-13-03788-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/7847dd76bc88/materials-13-03788-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/4b288603d49c/materials-13-03788-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/af685815851d/materials-13-03788-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/67ef1c88d3ea/materials-13-03788-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/9de019bec097/materials-13-03788-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/d8c1c1017aa3/materials-13-03788-g004a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/1ca6c6c5ae2f/materials-13-03788-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/54d929e9dbea/materials-13-03788-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/51f64e8468e3/materials-13-03788-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/975a33a21fed/materials-13-03788-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/7847dd76bc88/materials-13-03788-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d3ac/7503808/4b288603d49c/materials-13-03788-g010.jpg

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引用本文的文献

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本文引用的文献

1
Structural aspects of decreasing the corrosion resistance of zinc coating obtained in baths with Al, Ni, and Pb additives.在含有铝、镍和铅添加剂的镀液中获得的锌涂层耐腐蚀性能降低的结构方面。
Materials (Basel). 2020 Jan 14;13(2):385. doi: 10.3390/ma13020385.
2
Microstructure Characterization and Corrosion Resistance of Zinc Coating Obtained on High-Strength Grade 10.9 Bolts Using a New Thermal Diffusion Process.采用新型热扩散工艺在10.9级高强度螺栓上获得的锌涂层的微观结构表征及耐腐蚀性
Materials (Basel). 2019 Apr 29;12(9):1400. doi: 10.3390/ma12091400.