摘要
通过失重试验、电化学测试、XPS测试等研究了微量氟化钾对AZ91D、NZK和AM-SC1三种镁合金在商用CALTEX冷却液中腐蚀行为的影响。结果表明:随着CALTEX冷却液中氟化钾含量的增大,三种合金在其中的腐蚀速率随之减小,且氟化钾对AM-SC1和NZK合金腐蚀的抑制作用比较显著;氟化钾对合金的缓蚀作用是由于氟离子与镁反应,在合金表面生成难溶的MgF2膜,阻止了合金的进一步腐蚀。
The corrosion behaviors of AM-SC1, AZ91D and NZK magnesium alloys in CALTEX coolant with KF addition were studied through weight loss experiment, electrochemical test and XPS analysis. Results show that increasing the KF addition in the CALTEX coolant, the corrosion rates of three alloys decreased. The inhibitive effect of KF on corrosion of AM-SC1 and NZK alloys was significant. The reason KF inhabited corrosion of alloys was due to the formation of a layer of low solubility magnesium fluoride film, because of the reaction between fluorinion and magnesium on the surface of alloys, and prevented further corrosion attack to the alloys.
出处
《机械工程材料》
CAS
CSCD
北大核心
2013年第4期58-61,共4页
Materials For Mechanical Engineering
基金
国家“863”计划项目(2009AA033501)
