我国若干典型大气环境中的锌腐蚀  

ATMOSPHERIC CORROSION PERFORMANCE OF ZINC AT SEVERAL SELECTED TEST SITS IN CHINA

作　　者：王振尧[1] 于国才[1] 韩薇[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：《腐蚀科学与防护技术》2003年第4期191-195,共5页Corrosion Science and Protection Technology

基　　金：国家自然科学基金资助项目 (5 989914 0 )

摘　　要：通过锌在沈阳、江津和青岛的大气暴露试验 ,研究了锌在这三种典型环境中的大气腐蚀规律 .采用浸渍干燥湿润复合循环试验模拟大气腐蚀过程 ,研究了锌在 (NH4) 2 SO4、(NH4) 2 SO4+NaCl、(NH4) 2 SO4+NaHSO3 和(NH4) 2 SO4+NaHSO3 +NaCl介质中的腐蚀规律 .试验结果表明在 :大气暴露试验和室内模拟加速腐蚀试验中 ,锌的腐蚀产物都没有起到阻滞腐蚀的作用 ,腐蚀规律可用ΔW =Kt公式描述 .采用 10 -2 mol/L (NH4) 2 SO4+ 10 -2mol/LNaHSO3 或者再 + 10 -2 mol/LNaCl介质为加速剂 ,通过干湿复合循环试验 ,可模拟锌在沈阳和江津大气环境中的腐蚀 ,推测户外长期暴露试验的结果 .The atmospheric corrosion law of zinc in three typical arears in China such as Shenyang,Jiangjin and Qingdao was studied through out-door exposure test.An accelerated corrosion test consisted of cyclic steps immersion-dry-wet was also applied to simulate the process of atmospheric corrosion,the solutions of (NH 4) 2SO 4,(NH 4) 2SO 4+NaCl,(NH 4) 2SO 4+NaHSO 3 and (NH 4) 2SO 4+NaHSO 3+NaCl were selected as corrosive media,the influence of these media on corrosion of zinc was discussed.The test results show that the atmospheric corrosion law of zinc can be described by the formula of Δ W=Kt .The immersion-dry-wet combined cycles experiment with 10 -2 mol/L (NH 4) 2SO 4+10 -2 mol/L NaHSO 3 or+10 -2 mol/L NaCl as accelerator can be applied to simulate the process of atmospheric corrosion at Shenyang and Jiangjin respectively the corrosion of zinc exposed in atmosphere.

关 键 词：大气暴露试验 锌 大气腐蚀 室内模拟加速腐蚀试验 干湿复合循环试验 

分 类 号：TG174.31[金属学及工艺—金属表面处理] TG172.3[金属学及工艺—金属学]