有機矽的添加對三價鉻藥液化成皮膜之影響

• Main Authors: Wu,Jui-Pin, 吳瑞斌
• Other Authors: 葛明德
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/23463269205300425286

碩士 === 國防大學中正理工學院 === 應用化學研究所 === 96 === The study is added organic-Si to trivalent chromium baths, even if after heat treatment at high temperature, which still has excellent corrosion resistance. The OCP measurement was showed no different when the organic-Si was added to trivalent chromium baths. And all the steady time were fall on 60s. Both AC impedance and FE-SEM were certainly showed the superior corrosion resistance performance when the organic-Si was added to trivalent chromium baths. In heat treatment test at high temperature 150℃ and(or) 200℃. The SEM showed no crack and(or) cavity on the chromium conversion layers , even if after high temperature heat treatment at 150℃, so the chromium conversion layers still has excellent corrosion resistance. Conversely, crack and(or) cavity on the chromium conversion layers were generated, when the high temperature heat treatment at 200℃ By means of TEM, we found that a homogeneous chromium conversion layers was formed. And the XPS measurement was certainly showed the existence of Si-compound in chromium conversion layers. Deduced that added organic-Si to trivalent chromium baths, which defend the heat concussion, and resulting in the corrosion resistance advanced. Keywords:Chemical conversion, Impedance spectroscopy, FE-SEM