摘要
铜及铜合金制品需进行钝化处理 ,否则会氧化变色 ,影响外观。在低温、快速的操作条件下 ,具有良好防护效果的铜及铜合金无铬钝化工艺是目前国内外研究的热点。本工艺通过引入氧化促进剂及辅助成膜剂与BTA配用 ,钝化效果超过了传统的含铬钝化工艺 ,具有低温、快速、易于管理操作使用等优点。结果表明 ,硝酸滴定法防护性测试达到 2 0s以上 ,超过传统六价铬 6s的合格标准 ,从实用角度讨论了影响因素及使用管理方法 。
It is imperative for the wares made of copper and its alloy to be passivated before putting into use, otherwise they will be liable to oxidation tarnishing and appearance degradation. The chromium free passivation for copper and its alloy under the conditions of low temperature and rapid processing is one of the hotspots in the surface finishing field. However, the development in this area is still far from satisfaction. Thus the chromium free passivation process for copper and its alloy was modified by introducing an oxidation accelerator and an auxiliary film forming agent to cooperate with BTA. The effects of various factors on the modified passivation process were investigated with a view to the practical application. It was found that the modified passivation process was superior to the traditional Cr(VI) process in terms of the low temperature, rapidity, and convenient operation. The resulting passivated surfaces of Cu and its alloy were able to endure nitric acid titration up to more than 20 s, which by far exceeded (6 s), the qualified standard corresponding to traditional Cr(VI) process. Moreover, the modified process could be readily used in mass production.
出处
《材料保护》
CAS
CSCD
北大核心
2005年第1期37-39,67,共4页
Materials Protection
关键词
清洁生产
低污染
无铬钝化
铜及铜合金
苯并三氮唑
clean production
low pollution
chromium free passivating
copper and copper alloy
BTA
