NON-ANODISED SURFACE FINISHES ON MAGNESIUM ALLOYS
- 作者：Sergei P. PanovHan DongJames B. Metson
- 会议时间：2012-04-19
- 关键词：magnesium ; alloys ; cast ; wrought ; electro-polishing ; chemical polishing ; etching ; selective ; electropassivation ; coloured ; finish ; anodising ; decorative ; XPS ; method ; brightening ; surface ; film ; uniform ; application
- 作者单位：Sergei P. Panov,Han Dong(Research & Development Department Astron Limited Shenyang, China)James B. Metson(Chemistry Department The University of Auckland Auckland, New Zealand)
- 母体文献：2012中国(重庆)国际表面工程大会暨第十一届中国表面·电镀与精饰年会论文集
- 会议名称：2012中国(重庆)国际表面工程大会暨第十一届中国表面·电镀与精饰年会
- 会议地点：重庆
- 主办单位：中国表面工程协会
- 语种：chi
- 分类号：TG2;TG1
摘要
Electro-passivated bright and metallic finishes have been produced on cast and wrought magnesium alloys: AZ91, AM50 and AZ31. A selective etching method which allows eliminating minor surface defects by yielding textured metal appearance has been found. These techniques have also been combined with coloured anodising. As a result a variety of decorative finishes has been obtained. Designed technology offers additional routes to traditional magnesium surface treatment by formation of aesthetically attractive metal appearance. The surface films on the chemically and electrolytically polished magnesium alloys AZ31 and AZ91 have been investigated using X-ray photoelectron spectroscopy (XPS) method. Experiments show a uniform surface film in electropolishing processes and selective etching of aluminium and magnesium in chemical brightening. It was experimentally found that the nature of the surface films is different for bare, chemically polished, and electro-polished metal. All these data has been used for the experimental work on passivation of bright magnesium. As a result an efficient electro-passivation method has been designed and used in practical applications.