化学镀镍溶液中Al^(3+)、Ti^(4+)和Cr^(3+)杂质对镀层性能的影响

Influences of Al^(3+),Ti^(4+) and Cr^(3+) on the Coating Performance of Electroless Ni Plating

为了研究化学镀镍液中Al3+、Ti4+和Cr3+三种杂质元素对镀层性能的影响,分别在化学镀Ni-P合金的基础镀液中引入了不同含量的杂质,制备了化学镀镍层,并通过扫描电镜、弯折试验及中性盐雾试验分析测试了镀层表面形貌、结合力及耐蚀性。结果表明,化学镀镍溶液中Al3+、Ti4+和Cr3+三种杂质均使镀层结合力和耐蚀性下降。

In order to study the influences of three kinds of impurity elements namely Al^3＋ ,Ti^4＋ and Cr^3＋ on the coating performance of electroless Ni plating, the electroless Ni plated coating was prepared by adding the three kinds of impurities into the plating bath respectively. Surface morphology, adhesion and corrosion resistance of the coating were analyzed and tested by SEM, bending test and neutral salt spry test. Results showed that the three kinds of impurities in the electroless Ni plating bath could lead to adhe- sion and corrosion resistance of the coating decreased.