复配的表面活性剂对热镀锌无铵助镀剂的影响

采用表面张力实验、接触角测量、助镀剂盐膜量计量和金相显微镜测试等检测手段,研究了十六烷基三甲基溴化铵、脂肪醇聚氧乙烯醚及两者复配的表面活性剂的添加对热镀锌无铵助镀剂性能的影响,考察了表面活性剂对新型助镀剂的湿润性能和盐膜量的作用,观察了盐膜的形貌变化。研究结果表明:一定浓度复配的表面活性剂可使助镀溶液对镀件的表面张力下降67.10%,使助镀溶液对镀件的接触角从71°减小到37°,使助镀剂盐膜量下降29.10%,均优于添加单一表面活性剂的;且金相显微镜图显示,加入复配表面活性剂的助镀溶液形成的盐膜更加均匀、致密。

Effects of Surfactant Complex on the Properties of Ammonium-Free Fluxing Agent Film in Hot Galvanized Plating

By adopting the surface tension test, contact angle measurement, plating film measurement, salt film quantity measurement and metallographic microscope test, a research has been conducted on the effects of the addition of cetyl trimethyl ammonium bromide (CTAB) , fatty alcohol polyoxyethylene ether, and the surfactant mixtures of the two on the properties of hot dip galvanizing, followed by an investigation of the effects of the surfactant on wettability and salt film capacity of the new-typed plating aid, as well as an observation of the morphology change of the salt film. The research results show that the surface tension of the plating solution has been reduced by 67.10% by the composite surfactant, which leads to a reduction of the contact angle of the plating solution from 71 to 37 in degree, and a decrease of the salt film capacity of the plating agent by 29.10%, an indication that they are both superior to the addition of the single surfactant. And the metallographic microscope shows that the salt film formed by the plating solution added with the composite surfactant is more homogeneous and compact in distribution.