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EFFECT OF SO2 ON CORROSION MECHANISMOF A3 STEEL AT DEWING ENVIRONMENT |
Wei Han;Wei Jia;Jun Wang |
中国科学院金属研究所;金属腐蚀与防护国家重点实验室 |
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Abstract The effect of SO2 which is the most aggressive su bstance towards metals in wet atmosphere on the corrosion A3 steel was studied b y means of AC impedance,IRAS and SEM.The results indicate that,corrosion weight loss increased with time evidently in test environment with SO2,especially at last period time.The surface of the test specimens is in a chap feature.The IR a b sorption spectra shows that,corrosion product layer is rich of FeSO4·7H2O,F e2(SO4)3·9H2O and γ-FeOOH,there are a little of δ-FeOOH and,a nd a trace of Fe(OH)2 and Fe3O4.The corrosion weight loss with time of A3 steel accords with the law of line in test environment without SO2,the corrosi on products on specimens are Fe2O3 and γ-FeOOH,which did not cover com pletely on speciments.
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Received: 17 September 2001
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Corresponding Authors:
Wei Han
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