Stress corrosion behavior of TP347H stainless steel and BT700-l alloy

doi:10.13251/j.issn.0254-6051.2024.08.001

Abstract

Abstract: Stress corrosion cracking (SCC) behavior of TP347H stainless steel and BT700-l alloy in high concentration salt corrosion environment was studied by using slow strain rate tensile (SSRT) stress corrosion test. The results show that there is no SCC behavior between the TP347H stainless steel and BT700-l alloy in high concentration salt solution with different pH values. The TP347H stainless steel and BT700-l alloy show a certain SCC tendency under the condition of Cl^- sensitization and H⁺ catalysis in acidic corrosion environment, and the fractures are tough-brittle mixed cracking. The stress corrosion resistance of the BT700-l alloy in acid corrosion environment is significantly higher than that of the TP347H stainless steel.

Key words: TP347H stainless steel, BT700-l alloy, slow strain rate tensile (SSRT), stress corrosion cracking (SCC), high concentration salt solution

CLC Number:

TG132.3

Li Dongsheng, Liu Rencai, Tu Yuhang, Lan Keyu. Stress corrosion behavior of TP347H stainless steel and BT700-l alloy[J]. Heat Treatment of Metals, 2024, 49(8): 1-8.

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