清洁型免水洗常温锰钙钡系磷化液的研究-表面技术.PDF

摇 第42卷摇 摇 第2期摇 摇 2013 年4 月 表面技术 摇 摇 摇 Vol.42摇 No.2摇 Apr.2013 SURFACE TECHNOLOGY 摇摇摇 89 清洁型免水洗常温锰钙钡系磷化液的研究 刘迎新,余取民,刘婷琛,何协华 (长沙学院,长沙410003) 摇 摇 [摘摇 要]摇 以磷酸二氢锰、硝酸钙、硝酸钡、钼酸钠等为原料配制锰钙钡系磷化液,对Q235 钢铁试片进行常 温磷化,磷化后免水洗,自然干燥3 h 以上,获得了彩色锰钙钡系磷化膜。 分析了磷化膜的形貌和组成,考察了磷 化液pH值、磷化温度、磷化时间、磷化量等工艺条件对磷化膜性能的影响。 结果表明,在磷化液pH值2.3~2.8、 磷化温度5~40 益下浸渍磷化8~10 min,可生成连续、致密且颗粒细小的免水洗锰钙钡系磷化膜;磷化膜由Fe, 2 Mn,Ca,Ba 的磷酸盐及少量钼酸盐等组成,耐硫酸铜溶液腐蚀时间85 s,膜质量0.9 g/ m 左右,喷涂铁红环氧底 漆后的涂层附着力达1级。 [关键词]摇 锰钙钡系磷化液;常温;免水洗 [中图分类号]TG174.45 摇 摇 摇 [文献标识码]A 摇 摇 摇 [文章编号]1001鄄3660(2013)02鄄0089鄄03 Study on Cleaning and Free鄄washing Mn鄄Ca鄄Ba Phosphating Solution at Room Temperature LIU Ying鄄xin,YUQu鄄min,LIU Ting鄄chen,HE Xie鄄hua (Changsha University,Changsha410003,China) [Abstract]摇 Q235 Steel specimen was phosphated at room temperature in the Mn鄄Ca鄄Ba phosphating solution consisting of manganese dihydrogen phosphate,calcium nitrate,barium nitrate and sodium molybdate. Washing鄄free,colorful phosphate coating wasformed after natural drying for 3 hours. The effect of pH value,temperature,treatment time and the lifetime of phosphating solution on the properties of the phosphate coating was investigated. Moreover,the morphology and component of the phosphate coating were analyzed. The results show that continuous and compact phosphate coating is obtained when the specimen isphosphatedfor8~10 minunder5~40 益withphosphatingsolution,whosepHvalueis2.3~2.8. Theparticlesof the phosphate coatingareveryfine. Thephosphatingcoatingiscomposedofphosphateof Fe,Mn,CaandBaandalittleof mo鄄 lybdate. The time of copper sulphate solution corrosionresistanceismorethan85 s,andth