음극 인가전위 하에서 type 2205과 type 316L의 수소취성 저항성
Comparison of Hydrogen Embrittlement Resistance between 2205 Duplex Stainless Steels and type 316L Austenitic Stainless Steels Under the Cathodic Applied Potential
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2205 duplex stainless steels have been used for the construction of the marine environment, because oftheir excellent corrosion resistance and high strength. However, the resistance to hydrogen embrittlement(HE) may be less than that of 316L austenitic stainless steel. The reason why 316L stainless steels havebetter resistance to HE is associated with crystal structure (FCC, face centered cubic) and the higher stackingfaults energy than 2205 duplex stainless steels. Furthermore 2205 stainless steels with or without tungstenwere also examined in terms of HE. 2205 stainless steels containing tungsten is less resistible to HE. Itis because dislocation tangle was formed in 2205 duplex stainless steels. Slow strain-rate tensile test (SSRT)was conducted to measure the resistance to HE under the cathodic applied potential. Hydrogen embrittlementindex (HEI) was used to evaluate HE resistance through the quantitative calculation.
Abstract
2205 duplex stainless steels have been used for the construction of the marine environment, because oftheir excellent corrosion resistance and high strength. However, the resistance to hydrogen embrittlement(HE) may be less than that of 316L austenitic stainless steel. The reason why 316L stainless steels havebetter resistance to HE is associated with crystal structure (FCC, face centered cubic) and the higher stackingfaults energy than 2205 duplex stainless steels. Furthermore 2205 stainless steels with or without tungstenwere also examined in terms of HE. 2205 stainless steels containing tungsten is less resistible to HE. Itis because dislocation tangle was formed in 2205 duplex stainless steels. Slow strain-rate tensile test (SSRT)was conducted to measure the resistance to HE under the cathodic applied potential. Hydrogen embrittlementindex (HEI) was used to evaluate HE resistance through the quantitative calculation.
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