摘要
研究了氯化钾镀锌低铬彩色钝化的抗蚀及抗变色机理,提出采用偶联剂对钝化后的锌层进行封闭的方法提高抗蚀及抗变色性。在封闭过程及干燥过程中,被封闭面上吸附的硅烷偶联剂迁移到钝化膜三价铬化合物形成的骨架内空隙处发生水解反应生成硅醇基,与钝化膜上的羟基形成氢键或结合成SiO-M（M为无机表面）。同时,硅烷偶联剂各分子之间硅醇基又相互缩合,齐聚形成网状结构的膜填充或覆盖在钝化膜表面,产生一种新的结构,改善了耐蚀性。
Having reached the corrosion-resistance and discolorment-resistance principle of KCI Zn-plating low-Cr color passivation.at the same time using the way to dosing the passivated Zn-coating with coupling agent to improve the corrosion resistance and disolorment resistance. During the closing and drying process .silane coupling agent absorbed on the closed surface more to the gap in the frame which is formed with the Cr3+ compound of the passivated coating.and is dissociated into Si-alcohol groups,then the Si -alcohol group form the hydro -bond with OH-group on the passivated coating or bond SiO-M(M is an inorganic surface). Meanwhile.silicon alcohol group in each molecule of silane coupling agent condensates each other.and forus membrane fillings of net construction or covering at passivated membrance surface.which produces a new construction and improves corrosion-resistance
出处
《表面技术》
EI
CAS
CSCD
1999年第4期20-23,共4页
Surface Technology
