Interaction between austein-ferrite phases on passive performance of 2205 duplex stainless steel

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（11）
• 页码范围: 2140-2148
• 页数: 9页
• 语种: 英文

摘要

The passive behavior of 2205 duplex stainless steel (DSS) and its individual phases (α-phase,γ-phase) in neutral 3.5％ NaCl solution was investigated by various electrochemical methods.The results indicated that galvanic effect between α and γ phases cannot deteriorate local corrosion,but favors the enhancement of the passive film.Under the galvanic effect,the diffusion of the dissolved passive cations would be promoted in a short distance between α and γ zones,leading to modifications of the chemical composition and semiconductive property of the passive film and therefore the enhancement of the corrosion resistance of DSS 2205.