陕西土壤模拟液中3种典型接地金属材料的腐蚀行为  

Corrosion Behavior of Three Kinds of Typical Grounded Metal in Simulated Solution of Shanxi Soil

作　　者：王森[1] 骆鸿[2] 李志忠[1] 肖葵[2] 吉宏亮[1] 董超芳[2] 

机构地区：[1]陕西电力科学研究院国家电网公司电网接地工程技术实验室,陕西西安710054 [2]北京科技大学腐蚀与防护中心,北京100083

出　　处：《材料保护》2012年第2期70-73,87,共4页Materials Protection

基　　金：国家电网公司2009年度科技项目(5226ky100022)

摘　　要：为了弄清3种典型接地金属材料(H62黄铜、Q235钢、镀锌钢)在陕西土壤中的腐蚀情况,采用失重法(外加电流浸泡)、电化学测试、扫描电镜(SEM)和X射线衍射(XRD)研究了其在陕西中部土壤模拟液中的腐蚀行为和电化学规律。结果表明:在有外加电流的模拟液中浸泡,随浸泡时间延长,Q235钢腐蚀速率逐渐变慢,镀锌钢表面镀锌层腐蚀较快,H62黄铜的腐蚀速率变化不大;Q235钢、镀锌钢、H62黄铜的腐蚀产物分别主要为α-FeOOH、β-FeOOH、Fe3O4,ZnO、Zn(OH)2、FeOOH、Zn5(CO3)2(OH)6和Cu2O、CuO、CuCl2;在含相同NaCl浓度的模拟液中,H62黄铜的耐腐蚀性能最好,镀锌钢的次之,Q235钢的最差。The corrosion behavior and electrochemical properties of three kinds of typical grounded metals (H62 brass, Q235 and galvanized steel), in the simulated solution of central-section Shanxi soil were investigated using weight loss method (immersion under externally applied current) and electrochemical tests in association with scanning electron microscopic analysis and X-ray diffraction analysis. It was found that in the simulated solution of the soil, the corrosion rate of Q235 steel decreased with extending immersion time. Galvanized steel experienced rapid corrosion in the same solution, but the corrosion rate of H62 brass kept almost unchanged. The corroded products of Q235,galvanized steel and H62 brass in the simulated solution included α-FeOOH, β-FeOOH and Fe3O4; ZnO, Zn(OH)2, FeOOH and Zn5(CO3)2(OH)6; Cu2O, CuO and CuCl2. In the simulated solution containing the same concentration of NaCl, H62 brass had the best corrosion resistance, followed by galvanized steel, while Q235 steel had the poorest corrosion resistance.

关 键 词：土壤腐蚀 接地金属材料 模拟液 耐蚀性 

分 类 号：TG172.4[金属学及工艺—金属表面处理]