XU Meiling,KANG Shumei,CHEN Tingting,et al.Properties of Electroless Plating Ni?P on Magnesium AlloySubstrate by Adding CeCl3[J].Plating & Finishing,2019,(1):37-40.[doi:10.3969/j.issn.1001-3849.2019.01.008]
添加氯化铈对镁合金Ni?P化学镀镀层性能影响
- Title:
- Properties of Electroless Plating Ni?P on Magnesium Alloy Substrate by Adding CeCl3
- Keywords:
- chemical deposition; magnesium alloys; cerium chloride; micro?hardness; corrosion resistance
- 分类号:
- TQ153.2
- 文献标志码:
- A
- 摘要:
- 为提高镁合金的耐腐蚀性,采用化学沉积法在AZ91D镁合金表面制备了Ni?P镀层,并确定了化学镀Ni?P的制备工艺。利用扫描电子显微镜(SEM),维氏硬度测试仪和Autolab电化学工作站来研究镀层的沉积速率、硬度、显微形貌及耐蚀性。结果表明,在3.5% NaCl腐蚀液中,在硫酸镍浓度为22 g?L-1、还原剂次亚磷酸钠浓度为20 g?L-1、温度为80 ℃、pH为7.3、稀土CeCl3浓度为0.15 g?L-1的条件下,Ni?P镀层具有较好的耐腐蚀性;CeCl3的加入量对Ni?P合金镀层的耐蚀性能产生了明显的影响,镀层的耐蚀性随着CeCl3含量的增加先增大后减小。
- Abstract:
- In order to improve the corrosion resistance of magnesium alloy, Ni?P coatings were prepared on the surface of AZ91D magnesium alloy by chemical deposition method, and the preparation process of electroless Ni?P was determined. The deposition rate, hardness, microstructure and corrosion resistance of the coatings were studied by scanning electron microscope (SEM), Vickers hardness tester and Autolab electrochemical workstation. Results showed that when the concentration of nickel sulfate was 22 g?L-1, sodium phosphate concentration was 20 g?L-1, temperature was 80 ℃, pH was 7.3, rare earth CeCl3 concentration was 0.15 g?L-1, Ni?P coating had good corrosion resistance in 3.5 % NaCl solution. The addition of CeCl3 had a significant effect on the corrosion resistance of Ni?P alloy coating, and the corrosion resistance of the coating decreased with the increase of the amount of CeCl3.
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备注/Memo
收稿日期: 2018-05-27
修回日期: 2018-07-17
基金项目: 基金项目:辽宁省教育厅项目资助(2017LNQN14)