https://scholars.lib.ntu.edu.tw/handle/123456789/73495
標題: | Formation and properties of stannate conversion coatings on AZ61 magnesium alloys | 作者: | Lin, C.S. Lin, H.C. Lin, K.M. Lai, W.C. LinCS LinHC |
關鍵字: | AZ61 magnesium alloys; Corrosion resistance; Salt spray test; Stannate conversion coating | 公開日期: | 2006 | 卷: | 48 | 期: | 1 | 起(迄)頁: | 93-109 | 來源出版物: | Corrosion Science | 摘要: | The effects of solution composition and temperature on the microstructure and corrosion resistance of stannate conversion coatings on AZ61 magnesium alloys were investigated. The conversion coating consisted of a porous layer as under layer intimately contacted with the magnesium plate and a hemispherical particle layer as major overlay formed right on top of the porous layer. During the coalescence of the hemispherical particles to form a complete coating on the magnesium alloy, some sites of discontinuity inevitably left and determined the corrosion resistance of the coating evaluated using a salt spray test. Increasing bath stannate ion concentration and lowering bath pH increased the population density of the hemispherical particles whose size was accordingly reduced. The corrosion resistance of the conversion coating was improved with finer particles, which were preferably formed at less alkaline solution with higher stannate ion contents. Furthermore, the conditions favoring the formation of finer particles also reduced the immersion time necessary for producing the conversion coating with optimal corrosion resistance. © 2005 Elsevier Ltd. All rights reserved. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/93303 https://www.scopus.com/inward/record.uri?eid=2-s2.0-28044446122&doi=10.1016%2fj.corsci.2004.11.023&partnerID=40&md5=46b78ac338e2fb0c68297ad3aca477db |
ISSN: | 0010938X | SDG/關鍵字: | Corrosion resistance; Magnesium alloys; Microstructure; pH effects; AZ61 magnesium alloy; Salt spray test; Stannate conversion coating; Coatings; coating; corrosion resistance; magnesium alloy; microstructure |
顯示於: | 材料科學與工程學系 |
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