摘要
镁锂合金电极电位低,化学性质活泼,在使用中容易发生腐蚀。化学镀镍能有效改善LA103Z镁锂合金耐蚀性差的问题,在化学镀镍过程中,槽液温度对镀层质量有很大的影响。通过对不同槽液温度下镀镍层的厚度、孔隙率、结合力进行基本性能表征,采用电化学试验和盐雾试验进行耐蚀性表征来研究槽液温度对镀镍镁锂合金耐蚀性的影响,发现当槽液温度为50℃时,得到的镀镍层孔隙率低、结合力好,腐蚀电位较基体提高200 mV,腐蚀电流密度降低了3个数量级,96 h盐雾试验后未发生明显腐蚀,对基体有很好的保护作用,对镁锂合金化学镀镍工艺研究具有重要意义。
The magnesium lithium alloy electrodes had low potential,active chemical properties,and were prone to corrosion during use.The chemical nickel plating could effectively improve the poor corrosion resistance of LA103Z magnesium lithium alloy,and during the process of electroless nickel plating,the temperature of the bath had a significant impact on the quality of the coating.We characterized the basic properties of nickel plating layer thickness,porosity,and adhesion at different bath temperatures,and researched on the effect of bath temperature on the corrosion resistance of nickel plated magnesium lithium alloy through the electrochemical test and the salt spray test.It was found that at a bath temperature of 50℃,the obtained coating had low porosity and good adhesion,with a corrosion potential increased by 200 mV compared to the substrate and a corrosion current density reduced by three orders of magnitude.After 96 h of salt spray testing,no significant corrosion occurred,and it provided good protection for the substrate.It was great significant to the electroless nickel plating process of the magnesium lithium alloy.
作者
朱莉莉
郭明科
唐源
赵昆雨
李学航
吴若晴
李晓天
李辰
ZHU Lili;GUO Mingke;TANG Yuan;ZHAO Kunyu;LI Xuehang;WU Ruoqing;LI Xiaotian;LI Chen(Aerospace Science&Industry Corp.Defense Technology R&T Center,Beijing 100854,China)
出处
《新技术新工艺》
2025年第7期25-30,共6页
New Technology & New Process
关键词
镁锂合金
化学镀镍
孔隙率
电化学测试
盐雾试验
magnesium lithium alloy
electroless nickel plating
porosity
electrochemistry test
salt spray tests
