环境因素对纯Zn在饱和Zn(OH)_2溶液中腐蚀行为的影响Ⅰ——Cl^-浓度和pH值  

Effect of Environmental Factors on Corrosion Behavior of Zn in Saturated Zn(OH)_2 Solution Ⅰ——Cl^-Concentration and pH Values

作　　者：刘栓 周开河[2] 方云辉[2] 徐孝忠[2] 江炯[2] 郭小平 郑文茹 蒲吉斌 王立平 LIU Shuan ZHOU Kaihe FANG Yunhui XU Xiaozhong JIANG Jiong GUO Xiaoping ZHEN Wenru PU Jibin WANG Liping(Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China State Grid Zhejiang Electric Power Corporation Ningbo Power Supply Company, Ningbo 315201, China Wuhu Spring New Material Co., Ltd, Wuhu 241000, China)

机构地区：[1]中国科学院宁波材料技术与工程研究所中国科学院海洋新材料与应用技术重点实验室浙江省海洋材料与防护技术重点实验室,宁波315201 [2]国网浙江省电力公司宁波供电公司,宁波315201 [3]芜湖春风新材料有限公司,芜湖241000

出　　处：《中国腐蚀与防护学报》2016年第6期522-528,共7页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金项目(41506098);中国博士后基金和第九批特等资助项目(2015M580528和2016T90553);浙江省博士后科研项目择优资助项目(BSH1502160);宁波市自然科学基金项目(2016A610261)资助

摘　　要：研究纯Zn在模拟大气腐蚀环境(饱和Zn(OH)_2溶液)中的初期电化学腐蚀机理。采用极化曲线和电化学阻抗谱,结合扫描电子显微镜,探究Cl^-浓度和pH值对纯Zn在饱和Zn(OH)_2溶液中电化学腐蚀行为的影响。结果表明:Cl^-破坏了锈层结构,诱导点蚀发生,纯Zn的腐蚀速率随着Cl^-浓度的升高而增大。纯Zn在强碱性溶液中处于钝态,其耐蚀性能随着pH值的升高而增大。The effect of CI- concentration and pH values on the electrochemical corrosion behavior of Zn in saturated Zn（OH）2 solutions, which aims to simulate the initial atmospheric corrosion envi- ronment, was studied by means of polarization curves, electrochemical impedance spectroscopy and scanning electron microscopy （SEM）. The results indicated that the corrosion rate of Zn in- creased with the increase of Cl- concentration, Cl destroyed the rust layer on the electrode, while induced pitting corrosion. Zn was in passive state at high alkaline solution, the corrosion resistance of Zn increased with the increase of oH value.

关 键 词：纯Zn 腐蚀行为 Cl- PH值 

分 类 号：TG174.3[金属学及工艺—金属表面处理]