Na_3PO_4对模拟汽车冷却液中AM60镁合金的缓蚀作用  

Corrosion Inhibition of Sodium Phosphate for AM60 Magnesium Alloy in Simulated Vehicle Coolant

作　　者：文家新[1,2] 许雯婷[2] 何建新[2] 王莎[2] WEN Jiaxin XU Wenting HE Jianxin WANG Sha(School of Chemical ＆ Pharmaceutical Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China)

机构地区：[1]重庆工业职业技术学院化学与制药工程学院,重庆401120 [2]重庆大学化学化工学院,重庆400044

出　　处：《腐蚀科学与防护技术》2016年第5期489-493,共5页Corrosion Science and Protection Technology

基　　金：重庆市教委项目(KJ2217)资助

摘　　要：通过极化曲线、电化学阻抗谱等电化学方法研究了Na_3PO_4对AM60镁合金在模拟汽车冷却液中的缓蚀性能,考察了缓蚀剂浓度、腐蚀介质温度和浸泡时间对缓蚀效率的影响,并探讨了缓蚀机理。结果表明:当Na_3PO_4的浓度为0.6 mmol/L时,AM60镁合金的缓蚀效率高达84.58%,长时间浸泡和高温时缓蚀效果不明显,更适合于在汽车模拟冷却液中对AM60镁合金进行短时间的缓蚀保护。The inhibition performance of sodium phosphate for AM60 magnesium alloy was investigated in an artificial vehicle coolant by polarization curves and electrochemical impedance spectroscopy（EIS）. The influence of concentration of inhibitor, medium temperature and immersion time, as well as the corrosion inhibition mechanism of sodium phosphate were also studied. The results show that the corrosion-inhibition efficiency is 84.58% when 0.6 mmol/L sodium phosphate is added into the coolant. The sodium phosphate has no obvious inhibition effect when AM60 magnesium alloy immersed in the simulated vehicle coolant for long time or the temperature of the coolant is too high, therefore 0.6 mmol/L sodium phosphate can protect AM60 magnesium alloy better in the simulated coolant only for a short time temperately.

关 键 词：AM60镁合金 模拟汽车冷却液 Na3PO4 缓蚀作用 

分 类 号：TG174.42[金属学及工艺—金属表面处理]