乙二醇溶液中AZ91D镁合金的缓蚀剂  

Corrosion lnhibitors for AZ91D Magnesium Alloy in Ethylene Glycol Solution

作　　者：江珊[1] 熊金平[1] 左禹[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《材料保护》2011年第7期23-25,60,共4页Materials Protection

基　　金：北京化工大学碳纤维及功能高分子教育部重点实验室资助项目(B类20090503)

摘　　要：常用于乙二醇型汽车冷却液的镁合金缓蚀剂存在环境污染、作用效果不稳定等问题,为此,将无机盐和有机物制备成一种复配型缓蚀剂。采用浸泡和电化学技术及表面分析技术研究了AZ91D镁合金在乙二醇冷却液中加入几种缓蚀剂后的腐蚀规律,并着重考察了几种缓蚀剂在体积分数50%的乙二醇溶液中的缓蚀机理和作用效率。结果表明:AZ91D镁合金的腐蚀速度随着乙二醇溶液中水含量的增加而增大,本缓蚀剂能明显抑制AZ91D镁合金在含水量50%的乙二醇溶液中的腐蚀,当缓蚀剂质量分数为2%时,其缓蚀率高达90%以上。Inorganic salts were formulated with organic compounds to develop complex inhibitors.The corrosion behavior of AZ91D Mg alloy in ethylene glycol solution containing various inhibitors was evaluated based on weight loss method,electrochemical technique and surface analytical technique.The corrosion inhibitiun mechanism and efficiency of several inhihitors in the aqueous solution of50%(volume fraction)ethylene glycol were highlighted.It was found that the corrosion rate of Mg alloy rose with increasing content of water in the ethylene glycol solution.As-prepared inhibitors were able to effectively retard the corrosion of the Mg alloy in the aqueous solution of50% ethylene glycol,and an inhibition efficiency of over90% was reached at an inhibitor dosage of 2% (mass fraction).

关 键 词：缓蚀剂 镁及镁合金 乙二醇溶液 腐蚀 

分 类 号：TG174.42[金属学及工艺—金属表面处理]