钢的大气暴露腐蚀与室内模拟加速腐蚀的相关性  

INVESTIGATION ON INTERRELATION OF INDOOR ACCELERATED CORROSION AND ATMOSPHERIC EXPOSURE CORROSION OF STEELS

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》2004年第2期70-73,共4页Corrosion Science and Protection Technology

基　　金：国家重点基础研究发展规划专项基金资助项目(G19990 650);社会公益研究专项资金项目 (2 0 0 1DIA10 0 7)

摘　　要：通过大气暴露试验和实验室的浸渍干燥湿润复合循环试验 ,结合腐蚀产物的表面分析 ,研究了 4种钢在沈阳地区的大气腐蚀规律和模拟大气腐蚀过程的腐蚀规律 .结果表明 :在大气暴露试验和室内模拟加速腐蚀试验中 ,4种钢的腐蚀产物都具有不同程度的保护性 ,腐蚀规律可用ΔW =Ktn 公式描述 ,室内外腐蚀试验结果有较好的相关性 .采用 0 0 1mol/LNaHSO3 +0 .0 0 1mol/LNaCl介质为加速剂 ,通过干湿复合循环试验 ,可模拟钢在沈阳大气环境中的腐蚀过程 ,近似推测户外长期暴露试验的结果 .The law of atmospheric corrosion of 4 steels in Shenyang area was studied by means of atmospheric exposure tests and their corrosion products were analyzed by XRD and IRAS.For comparison,an accelerated weathering tests of immersion-dry-wet combined cycles with the medium of NaHSO 3 and NaCl was used to simulate the field corrosion process.The results showed that,in the two conditions of field and laboratory,the corrosion process of steels could be described by a formulary of ΔW=Ktn;the main corrosion products are α-FeOOH and γ-FeOOH.It is obvious that there exists a rather good the interrelation between simulating accelerated corrosion and atmospheric exposure corrosion.The corrosion process of steels in Shenyang atmosphere could be simulated by accelerated weathering tests of immersion-dry-wet combined cycles with the medium of 0.01 mol/L NaHSO 3 and 0.001 mol/L NaCl.

关 键 词：钢 大气腐蚀 加速腐蚀试验 沈阳地区 相关性 

分 类 号：TG172.3[金属学及工艺—金属表面处理]