摘要
采用化学镀在钛基体上制备Ni-P舍金镀层。研究了活化时间、镀液pH值、热处理温度及时间对镀层的影响。用动电位极化曲线法比较镀层的耐均匀腐蚀性能，并用X-射线衍射仪和扫描电子显微镜分别研究镀层结构和表面形貌。结果表明，以HF为主剂的活化液，时间60s，pH值4．8-5．2的活化工艺以及250℃、保温2h的热处理为最佳工艺。镀层具有较高的耐蚀性能，属于非晶和微晶组成的混晶结构。借助于正交试验，确定了最佳工艺。
Electreless Ni-P coatings on titanium substrate are prepared. The effects of activation time,bath pH,temperature and time of heat treatment on coating properties are investigated. The uniform corrosion resistance of the coatings is compared by using potentiodynamic polarzation curve method. The structure and surface morphology of the coatings are analyzed by XRD and SEM as well. The results indicate that the best process conditions for the activation solution with HF main ingredient are： activation time 60 s, pH 4.8 - 5.2 and heat treatment time 2 hours at 250℃.The coating has higher corrosion resistance and is of amorphous as well as microcrystalline structure. The best process is determined with the aid of orthogonal experiment.
出处
《电镀与环保》
CAS
CSCD
2007年第2期17-19,共3页
Electroplating & Pollution Control
基金
国家自然科学基金(E040103)
关键词
化学镀镍
钛基体
热处理
工艺
活化时间
electroless nickel plating
Ti base
heat-treatment
process
activity time
