Structure and Corrosion Resistance of Tin Salt Conversion Coating on Aluminum Alloy

摘要：

A chrome-free chemical conversion coating was prepared using stannous sulfate as the main salt. The morphology of the chemical conversion surface layer was observed by scanning electron microscopy (SEM). Coating composition and the microcosmic phase structure were characterized using energy dispersive X-ray (EDX) analysis and X-ray diffraction (XRD) respectively. Electrochemical method and dropping test were used to study the coatings corrosion resistance. The results indicated that the tin salts conversion coating is a crystal structure material that composites with Sn-F-O-Al et al., the surface appears as a accumulation of spherical particles, the crystallinity of conversion coating is better than uncoated sample obviously, the corrosion resistance has improved too.

关键词： stannous sulfate chemical conversion aluminum alloy corrosion resistance

作者: Yanbo Wu Sisi Zeng Peng Sun

作者单位: College of environmental and chemical engineering,Dalian Jiaotong University,P.R.China

会议类型: 国际会议

会议名称: 2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)

会议地点: 重庆

会议语种:英文

页码: 467-471

在线出版日期: 2010-09-17（万方平台首次上网日期，不代表论文的发表时间）