TY - JOUR
T1 - Environmentally assisted cracking behavior of single and dual phase stainless steels in hot chloride solutions
AU - Tseng, Chuan Ming
AU - Tsai, Wen Ta
N1 - Funding Information:
The authors would like to thank National Science Council of the Republic of China under contract NSC89-2216-E-006-068 for supporting this research. The authors would also like to thank China Steel Corporation for preparing and supplying duplex stainless steel for this study.
PY - 2004/1/2
Y1 - 2004/1/2
N2 - The environmentally assisted cracking (EAC) behavior of AISI 316L austenitic stainless steel (SS), AISI 430 ferritic stainless steel and 22% Cr duplex stainless steel (DSS) in hot chloride solutions were investigated. Slow strain rate testing (SSRT) technique was employed to evaluate the susceptibility to EAC in 3.5wt.% NaCl solution at 80°C and in 40wt.% CaCl2 solution at 100°C. The experimental results showed that the resistances to localized corrosion and EAC were strongly dependent on the microstructure, chemical composition and the nature of the environment involved. 430 SS was found less resistant to pitting corrosion and EAC in both chloride solutions. The SSRT results indicated that 316L SS and 22% Cr DSS became susceptible to EAC in hot 40wt.% CaCl2 solution. Selective dissolution was found participating in the initiation and growth processes in EAC of 22% Cr DSS. Besides, intergranular cracking was found in 316L austenitic SS while pitting enhanced EAC occurred in 430 ferritic SS in 40wt.% CaCl 2 solution at 100°C. The effect of strain rate on the susceptibility to EAC in hot CaCl2 solution was more pronounced in 316L austenitic SS and 22% Cr DSS than that in 430 ferritic SS.
AB - The environmentally assisted cracking (EAC) behavior of AISI 316L austenitic stainless steel (SS), AISI 430 ferritic stainless steel and 22% Cr duplex stainless steel (DSS) in hot chloride solutions were investigated. Slow strain rate testing (SSRT) technique was employed to evaluate the susceptibility to EAC in 3.5wt.% NaCl solution at 80°C and in 40wt.% CaCl2 solution at 100°C. The experimental results showed that the resistances to localized corrosion and EAC were strongly dependent on the microstructure, chemical composition and the nature of the environment involved. 430 SS was found less resistant to pitting corrosion and EAC in both chloride solutions. The SSRT results indicated that 316L SS and 22% Cr DSS became susceptible to EAC in hot 40wt.% CaCl2 solution. Selective dissolution was found participating in the initiation and growth processes in EAC of 22% Cr DSS. Besides, intergranular cracking was found in 316L austenitic SS while pitting enhanced EAC occurred in 430 ferritic SS in 40wt.% CaCl 2 solution at 100°C. The effect of strain rate on the susceptibility to EAC in hot CaCl2 solution was more pronounced in 316L austenitic SS and 22% Cr DSS than that in 430 ferritic SS.
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U2 - 10.1016/j.matchemphys.2003.11.034
DO - 10.1016/j.matchemphys.2003.11.034
M3 - Article
AN - SCOPUS:0942266494
SN - 0254-0584
VL - 84
SP - 162
EP - 170
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 1
ER -