A Nickel-Manganese-Modified Low Zinc Phosphate Solution for Cathode-Electrophoretic Painting of Steel Substrates
来源期刊：材料热处理学报2004年第5期
论文作者：ZHANG Xu-jian GAN Fu-xing LI Bao-song Lin An
关键词：Phosphating; Electrophoretic painting; Corrosion resistance; Alkali resistance;
摘 要：Phosphate coatings are partially dissolved in the cathodic area during the cathode-electrophoretic painting processes causing the result that the coatings adhesion, corrosion protection, alkaline resistance are decreased. Furthermore,the service life of the coated production will be shortened. The addition of Ni2+, Mn2+ to the phosphating bath to improve the corrosion stability, alkaline resistance, as well as the adhesion of coating layers is studied in the article. These heavy metals do not only catalyse the surface reactions but generate a more corrosion resistant surface. We perfected the trecation phosphate solution by reducing the sludge, accelerating the phosphating reactions, improving corrosion protection and alkaline resistance. More even and finer grain structures, excellent corrosion resistance were obtained compared to the traditional phosphating technique.
ZHANG Xu-jian1，GAN Fu-xing2，LI Bao-song2，Lin An2
(1.Wuhan Boxin Painting Materials & Instruments Corporation, Wuhan, China;
2.College of Resource & Environment Science, Wuhan University, Wuhan, China)
摘要:Phosphate coatings are partially dissolved in the cathodic area during the cathode-electrophoretic painting processes causing the result that the coatings adhesion, corrosion protection, alkaline resistance are decreased. Furthermore,the service life of the coated production will be shortened. The addition of Ni2+, Mn2+ to the phosphating bath to improve the corrosion stability, alkaline resistance, as well as the adhesion of coating layers is studied in the article. These heavy metals do not only catalyse the surface reactions but generate a more corrosion resistant surface. We perfected the trecation phosphate solution by reducing the sludge, accelerating the phosphating reactions, improving corrosion protection and alkaline resistance. More even and finer grain structures, excellent corrosion resistance were obtained compared to the traditional phosphating technique.
关键词:Phosphating; Electrophoretic painting; Corrosion resistance; Alkali resistance;
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