XU Jiaojiao*.Process Research of Chromic acid Passivation on the Tinplate[J].Plating & Finishing,2021,(7):56-59.[doi:10.3969/j.issn.1001-3849.2021.07.011]
镀锡板铬酸钝化工艺研究
- Title:
- Process Research of Chromic acid Passivation on the Tinplate
- 文献标志码:
- A
- 摘要:
- 采用铬酸溶液对镀锡板进行钝化，对钝化液组成、阴极电流密度、温度等工艺条件进行研究，通过宏观表面质量、钝化膜的组成、漆膜附着力评价等方面对钝化膜的性能进行考察。结果表明：在50 g/L CrO3+0.5 g/L H2SO4的钝化液中，阴极钝化电流密度控制在6~10 A/dm2、温度保持在50~60 ℃较为合适；在此条件下得到钝化膜总Cr含量达到10 mg/m2且Cr（OH）3/ Cr2O3含量比在0.9~1.5，钝化膜附着力较优，耐蒸煮。
- Abstract:
- The process conditions of passivation of tinplate with chromic acid solution were studied, including the composition of passivation solution, cathode current density and temperature. The performance of passivation film was investigated from the aspects of macro surface quality, composition of passivation film and adhesion evaluation of paint film. The results showed that in the passivation solution 50 g/L CrO3+0.5 g/L H2SO4, it was suitable to control the cathodic passivation current density at 6~10 A/dm2 and keep the temperature at 50 ~ 60 ℃. Under these conditions, the total Cr content of the passivation film reached more than 10 mg/m2 and the Cr（OH）3/Cr2O3 content ratio was 1~1.5, the passivation film had better adhesion and cooking resistance.
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备注/Memo
收稿日期： 2021-04-18；修回日期： 2021-05-18
作者简介： 许姣姣， 760204@baosteel.com