磷化工艺对电镀锌预磷化板磷化膜质量的影响
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  • 英文篇名:Effect of Phosphating Process on the Quality of Phosphating Film on Electrogalvanized Sheet
  • 作者:董蓓 ; 魏星 ; 刘渊媛 ; 何文翔
  • 英文作者:DONG Bei;WEI Xing;LIU Yuan-yuan;HE Wen-xiang;Wuhan Branch of Baosteel Central Research Institute;Dongfeng Peugeot Citroen Automobile Company Ltd.;
  • 关键词:电镀锌板 ; 磷化工艺 ; 膜重 ; 形貌 ; 耐蚀性
  • 英文关键词:electrogalvanized sheet;;phosphating process;;film weight;;morphology;;corrosion resistance
  • 中文刊名:CLBH
  • 英文刊名:Materials Protection
  • 机构:宝钢股份中央研究院武汉分院;神龙汽车有限公司;
  • 出版日期:2018-12-15
  • 出版单位:材料保护
  • 年:2018
  • 期:v.51;No.479
  • 语种:中文;
  • 页:CLBH201812018
  • 页数:5
  • CN:12
  • ISSN:42-1215/TB
  • 分类号:79-83
摘要
磷化工艺对磷化膜质量的影响较大。采用不同磷化工艺对电镀锌板进行处理。运用扫描电镜观察磷化膜形貌及晶粒尺寸、测量磷化膜膜重,研究了磷化工艺参数游离酸度、总酸度、酸比、温度和反应时间等因素对电镀锌磷化膜质量的影响,并结合硫酸铜点滴试验考察了磷化时间对磷化膜耐蚀性的影响。结果表明:最佳磷化工艺为游离酸度1.7~2.6,总酸度24.0~28.0,酸比8.0~14.0,温度46~54℃,磷化时间60 s;经最佳工艺得到的电镀锌磷化膜结晶细密均匀,晶粒尺寸大小均一,耐蚀性增强。
        The phosphating process played an important role on the quality of phosphate coating,and the electrogalvanized sheets were handled by different phosphating technologies. Scanning electron microscope was used to observe the morphology and crystal sizes of phosphate coating,and the film weight was measured by weight loss method. In addition,the influence factors such as free acidity( FA),total acidity( TA),acidity ratio( TA/FA),temperature and time on the quality of phosphate film were studied. At last,the corrosion resistance of film was evaluated by CuSO_4 solution dropping test. Results showed that optimum conditions of phosphating process were FA of 1.7-2.6,TA of 24.0-28.0,TA/FA of 8.0-14.0,temperature of 46-54 ℃ and phosphating time of 60 s. The phosphating film prepared under optimum conditions was dense,homogeneous and compact with excellent corrosion resistance. Furthermore,the grain size of phosphating film was uniform,and the corrosion resistance of film was improved.
引文
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