表面活性剂对镁合金基体上的非铬化镀镍涂层的腐蚀特性的作用  

Effects of surfactants on corrosion behavior of chromium-free electroless nickel deposit on magnesium alloy

作　　者：阮德文[1] 苏达格 梁雅琴[1] 伊兰哲田 连建设[1] 

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]本地治里工业大学机械工程学院,印度本地治里605014

出　　处：《吉林大学学报（工学版）》2013年第2期363-367,共5页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50871046);'973'国家重点基础研究发展规划项目(2010CB631001);印度人力发展部与中国教育部印-中文化交流奖学金项目

摘　　要：在镁合金AZ91D化学沉积了镍涂层,研究了非铬化预处理及表面活性物质对涂层腐蚀特性的影响。通过盐水试验(1mol/L HCl)和电化学极化试验(3.5%NaCl)检测了腐蚀性能。试验表明:化镀镍溶液中添加的表面活性剂可提高镁合金镍涂层上的抗腐蚀能力。此外,表面平整均匀的纳米和非晶相涂层提高了其抗腐蚀能力。极化试验表明,其腐蚀电位向正方转移,且腐蚀电流密度减低。浸泡试验和电化学极化试验都表明阳离子表面活化剂具有更好的提高抗腐蚀性能的作用。The nickel coating was electroless chemically deposited on AZ91D magnesium alloy and the effects of the surfactant on its corrosion behavior were investigated. The corrosion tests were carried out by immersion test（1 mol/L HC1） and electrochemical polarization test（3.5% NaC1）. The tests showed that the surfactant in the electroless nickel deposit bath enhances the corrosion resistance of the deposit on the magnesium alloy. In addition smoothness and amorphous plus nano-crystalline phases enhance its corrosion resistance significantly. The polarization tests showed that the corrosion potential moved towards the positive direction and the corrosion current density decreased. The immersion tests showed the same trend as that of the electrochemical polarization tests. On the whole, the corrosion resistance was enhanced by positive ion surfactants in the electroless deposits on the magnesium alloy.

关 键 词：金属材料 表面活性物质 化镀镍 腐蚀 镁合金 

分 类 号：TG174[金属学及工艺—金属表面处理]