高强钢在极地典型环境下的应力腐蚀开裂敏感性研究

doi:10.11896/cldb.25010189

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Abstract Equipment materials are subjected to environmental loads and working loads during polar operations, and stress corrosion is very likely to occur, leading to equipment failure. To address the stress corrosion cracking sensitivity of high-strength marine steel E40 in typical polar environments, experimental methods were used to study the corrosion and stress corrosion cracking sensitivity of E40 steel in typical polar environments. The influence of typical polar temperatures and corrosion environments on the stress corrosion cracking sensitivity of E40 steel was analyzed. Combined with the results of fracture morphology observations, the stress corrosion failure mechanism of E40 steel in typical polar environments was revealed. The results show that the corrosion weight loss of E40 steel increases with time in typical polar environments. The corrosion tendency of E40 steel is slightly weakened in -2 ℃ seawater environment, but the corrosion current density is similar to that in room temperature seawater environment, indicating that E40 steel still has a high corrosion rate in low temperature environments. In typical polar environments, low temperatures reduce the chemical reaction rate of materials, thereby reducing the stress corrosion cracking sensitivity of E40 steel. At the same temperature, compared with salt spray corrosion, seawater corrosion is more uniform and continuous, making the material show higher stress corrosion cracking sensitivity.

Key words： polar environment high-strength steel salt spray corrosion stress corrosion cracking sensitivity

Published: Online: 2026-02-13

CLC number:

U663

Corresponding Authors: ecsibelle@126.com

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	WANG Ke
	LIAO Qiang

Cite this article:

WANG Ke,LIAO Qiang. Study on Stress Corrosion Cracking Sensitivity of High-strength Steel in Typical Polar Environments[J]. Materials Reports, 2026, 40(3): 25010189-8.

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https://www.mater-rep.com/EN/10.11896/cldb.25010189 OR https://www.mater-rep.com/EN/Y2026/V40/I3/25010189

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