Susceptibility to Stress Corrosion Cracking of 254SMO SS

Materials Research

Lorenzo De Micheli²  Silvia Maria Leite Agostinho²  Giordano Trabanelli¹  Fabrizio Zucchi¹ 

[1] ,University of São Paulo Institute of Chemistry São Paulo SP ,Brazil

关键词: stainless steel;    stress corrosion cracking;    chloride and fluoride;   

DOI  :  10.1590/S1516-14392002000100011

来源: SciELO

【 摘 要 】

The susceptibility to stress corrosion cracking (SCC) of solubilized and sensitized 254SMO SS was studied in sodium chloride, and sodium fluoride solutions at 80 °C and sulfuric acid solutions in presence of sodium chloride at 25 °C. The influence of salt concentration, pH values and the addition of thiosulfate was examined. The susceptibility to SCC was evaluated by Slow Strain Rate Tests (SSRT), at 1.5 x 10-6 s-1 strain rate. The behavior of 254SMO was compared to those of AISI 316L SS and Hastelloy C276. 254SMO showed an excellent resistance to SCC in all conditions, except in the more acidic solutions (pH <= 1) where, in the sensitized conditions, intergranular stress corrosion cracking occurred.

【 授权许可】

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