文献类型：期刊文献

中文题名：化学镀Ni-W-P合金工艺开发及其耐蚀性能

英文题名：Preparation and Corrosion Performance of Electroless Plated Ni-W-P Coatings

作者：姚志燕[1];徐宏[1];侯峰[1];戴玉林[1];闫操[1]

机构：[1]华东理工大学机械与动力工程学院化学工程联合国家重点实验室,上海200237

年份：2011

卷号：23

期号：4

起止页码：353

中文期刊名：腐蚀科学与防护技术

外文期刊名：Corrosion Science and Protection Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：上海市重点学科建设项目(B503)资助

语种：中文

中文关键词：化学镀Ni—W—P合金;热处理;极化曲线;耐蚀性

外文关键词：electroless Ni-W-P; heat-treatment; polarization curve; corrosion resistance

摘要：以镀速和耐蚀性能作为判据,通过正交试验获得了较优的三元Ni-W-P合金镀层工艺,即镀液组成:硫酸镍30 g/L,次亚磷酸钠25～30 g/L,钨酸钠50 g/L,柠檬酸钠75 g/L,乳酸15 mL/L,硫酸铵30 g/L和添加剂20 mg/L;pH值9.0和镀液温度(90±2)℃.电化学测试结果表明,Ni-W-P镀层的耐蚀性能优于Ni-P镀层.研究了高温热处理对Ni-W-P合金镀层耐蚀性能的影响并采用扫描电镜(SEM)和X射线衍射仪(XRD)分析镀层形貌和相组成.结果表明,高温热处理导致镀层内部及镀层与基体之间发生了元素的互扩散,并在镀层表面生成致密的氧化膜,进而提高镀层的耐蚀性能.
Orthogonal experiments were conducted to find out the optimal process for electroless plating of Ni-W-P coatings. Deposition rate and corrosion resistance were taken as the index for performance assessment. The optimal process is that a solution consisted of NiSO4.6H2O 30 g/L, Na2H2PO2.H2O 25-30 g/L, Na2WO4.2H2O 50 g/L, Na3C6H5OT-2H2O 75 g/L, lactic acid 15 mL/L, （NH4）2SO4 30 g/L and additive 20 mg/L with pH9.0 at temperature （90±2） ℃ The corrosion performance of coatings were evaluated by electrochemical tests. The results indicated that the corrosion performance of Ni-W-P coating was superior to Ni-P coating. The corrosion resistance of Ni-W-P coating may be further improved after a proper high temperature heat- treatment. According to the scanning electron microscopy images and X-ray diffraction patterns, after heat treatment there exist an interdiffusion zone between Ni-W-P coating and substrate steel, whilst a compact oxide scale also formed on the surface of the coating, which are considered to be beneficial to the enhancement for the adhesion and corrosion resistance of the coatings.