The growth of zinc phosphate coatings on 6061-Al alloy

被引：50

作者：

Zhang, Sheng-lin ^{[1
,2
]}

Chen, Hua-Hui ^{[2
]}

Zhang, Xiao-lin ^{[3
]}

Zhang, Ming-Ming ^{[1
]}

机构：

[1] Henan Normal Univ, Chem & Environm Sci Coll, Xinxiang 453007, Henan, Peoples R China

[2] China Univ M&T, Sch Mech Elect & Informat Engn, Beijing 100083, Peoples R China

[3] Henan Univ Technol, Sch Chem & Chem Engn, Zhengzhou 450052, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2008年 / 202卷 / 09期

基金：

中国国家自然科学基金;

关键词：

phosphatation; hopeite; aluminum alloy; yttrium oxide; corrosion resistance;

D O I：

10.1016/j.surfcoat.2007.07.037

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Zinc phosphate coating was formed on 6061-Al alloy through a phosphating bath containing mainly ZnO, H3PO4, NaF. Yttrium oxide (Y2O3) was used as an accelerator of phosphatization to replace nitrite. The morphology, composition and the growth process of the zinc phosphate coating were investigated by SEM, EDX, XRD, FTIR and electrochemical measurements. The phosphate coating formed is composed of hopeite and metallic zinc. The formation and morphology of the zinc phosphate coating were strongly influenced by the presence of yttrium oxide (Y2O3) in the phosphating bath. The formed zinc phosphate coatings exhibited high corrosion resistance in 3% NaCl solution as shown by polarization measurement. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1674 / 1680

页数：7

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