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J Chin Soc Corr Pro  2002, Vol. 22 Issue (6): 355-358     DOI:
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EFFECT OF SO2 ON CORROSION MECHANISMOF 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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Wei Han; Wei Jia; Jun Wang. EFFECT OF SO2 ON CORROSION MECHANISMOF A3 STEEL AT DEWING ENVIRONMENT. J Chin Soc Corr Pro, 2002, 22(6): 355-358 .

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Abstract  The effect of SO2 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 SO2,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 FeSO4·7H2O,F e2(SO4)3·9H2O and γ-FeOOH,there are a little of δ-FeOOH and,a nd a trace of Fe(OH)2 and Fe3O4.The corrosion weight loss with time of A3 steel accords with the law of line in test environment without SO2,the corrosi on products on specimens are Fe2O3 and γ-FeOOH,which did not cover com pletely on speciments.
Key words:  A3 steel      atmospheric corrosion      sulphur dioxide      
Received:  17 September 2001     
ZTFLH:  TG172.3  

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https://www.jcscp.org/EN/     OR     https://www.jcscp.org/EN/Y2002/V22/I6/355

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