碳钢与低合金钢耐大气腐蚀规律研究  

STUDY ON ATMOSPHERIC CORROSION OF LOW ALLOY STEELS

作　　者：韩薇[1] 汪俊[1] 王振尧[1] 于国才[1] 李洪锡[1] 

机构地区：[1]中国科学院金属研究所金属腐蚀与防护国家重点实验室,沈阳110016

出　　处：《中国腐蚀与防护学报》2004年第3期147-150,154,共5页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金资助项目 ( 5 989914 0 )

摘　　要：采用干湿复合循环实验、电化学交流阻抗和扫描电镜等方法研究了 7种碳钢与低合金钢在试验环境中的腐蚀规律及腐蚀试验后带锈试样的电化学特征 .结果表明 ,7种材料的腐蚀失重率随时间均遵从负指数规律 :Y =Y0+Ae-t/B.电化学测试结果表明带锈试样进一步腐蚀的速度受阴极扩散过程所控制 ;7种材料带锈试样的阻抗值与材料的年腐蚀速率呈线性关系 .The corrosion of 7 kinds of mild steel and low alloy steel in immersion-wet-dry cycle test environment and the electrochemical feature of rusted metals after test were studied by using EIS and SEM et al.The solution containing HSO - 3 and Cl -,was used for wetting and immersion specimens at circumstance temperature 40℃ for 4 min respectively.The drying cycle was maintained for 12 min at temperature 12℃.The results indicated that,the weight loss all followed exponential decay function: Y=Y 0+Ae -t/B .The corrosion rate of mild steel was 2.49 times than that of the most corrosion resistant low alloy after 120 h test.The results of electrochemical measurement showed that,the further corrosion rate would be controlled by cathodic diffusion process.The impedance of 7 kinds of steels after corrosion test was linear with the annual corrosion rate.

关 键 词：钢 低合金钢 大气腐蚀 

分 类 号：TG172.3[金属学及工艺—金属表面处理]