镀锌层钛盐彩色钝化工艺  

Color Titanium Passivation Process for Zinc Coating

作　　者：王波[1] 范云鹰[1,2] 毕雅各 郭凤广[1] 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]云南滇科涂镀层材料有限公司,云南昆明650093

出　　处：《材料保护》2016年第5期26-29,75,共5页Materials Protection

基　　金：国家自然科学基金(51361018)资助

摘　　要：为提高镀锌层钛盐彩色钝化膜的耐蚀性能，改善钝化膜的外观，缩短钝化时间，采用正交试验对镀锌层钛盐彩色钝化液的组分进行优选，并用单因素试验研究了工艺参数（钝化液温度、pH值、钝化时间、干燥方式）对彩色钝化膜外观及其耐蚀性的影响。结果表明：镀锌层钛盐彩色钝化工艺最佳方案为8mL／LTiCl3，15g／LNaNO3，10mL／LH2O2，4g／LDK—TC添加剂，pH值为1．5～2．0，温度为30℃，钝化时间为15～25s，干燥方式对钝化膜耐蚀性的影响不大；该工艺能获得外观艳丽、光亮的彩色钝化膜，钝化膜中性盐雾试验出现白锈时间可达80．0h，硫酸铜点滴时间在40s以上。Cailiao Baohu 2016,49(05),26~29(Ch).For improving the corrosion resistance and appearance of color passivation film and shortening the time of passivation,the compositions of color titanium passivation solution of zinc coating were optimized by orthogonal design test,and the influences of process parameters(solution temperature,pH value,passivation time and drying method) on the appearance and corrosion resistance of color passivation films were analyzed by single-factor experiment.Results showed that the optimal process conditions of color titanium passivation were 8 mL/L TiCl_3,15 g/L NaNO_3,10 mL/L H_2O_2,4 g/L DK-TC additive,pH = 1.5-2.0,30℃ of temperature and 15-25 s of passivation time,while the drying method affected the corrosion resistance of film little.Under the above conditions,a passivation film with good appearance and bright color could be prepared.Besides,the time of the white rust appeared on optimal film in the NSS of the process was up to 80.0 h,and the copper sulfate dropping time was more than40 s.

关 键 词：镀锌层 钛盐彩色钝化 工艺优化 

分 类 号：TG174.4[金属学及工艺—金属表面处理]