A STUDY OF ATMOSPHERIC CORROSION OF STAINLESS STEELS--A SUMMARY OF 12 YEAR EXPOSURE TESTING

J Chin Soc Corr Pro

1999, Vol. 19

Issue (4): 227-232 DOI:

Research Report

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A STUDY OF ATMOSPHERIC CORROSION OF STAINLESS STEELS--A SUMMARY OF 12 YEAR EXPOSURE TESTING

Caifeng Liang;;

山东青岛钢铁研究总院海洋腐蚀研究所

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Abstract Results from 12 year atmospheric exposure of 5 types of stainless steel at 7 sites in China were summarized.The exposed steels were selected from commonly used stainless steels.The test sites represented typical encironments such as temperate and subtropical,industrial and marine and rural,humid and hot.Stainless steels under study were corrosion resistant in atmosphere,When Cr content was over 18%,their corrosion behavior became excellent.Mo could raise corrosion resistance.Even in humid and hot marine environment of high corrosivity,the steel with extra low carbon and some molybdenum did not corrode after 12 year exposure.Deposited dust and surface defect were the main places of origin of atmospheric corrosion for stainless steels.Among various environmental factors affecting atmospheric corrosivity,Cl- was most important.The humid and hot environment and the presence of Cl- resulted in extra high corrosion rates.Besides,SO2 had very little effect.

Key words: atmospheric corrosion exposure test stainless steel

Received: 23 September 1998

Corresponding Authors: Caifeng Liang E-mail: CaiFeng@public.QD.SD.CN

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Caifeng Liang. A STUDY OF ATMOSPHERIC CORROSION OF STAINLESS STEELS--A SUMMARY OF 12 YEAR EXPOSURE TESTING. J Chin Soc Corr Pro, 1999, 19(4): 227-232 .

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1999/V19/I4/227

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