Stress Corrosion Cracking  Behavior of X70 PipelineSteel in Near-Neutral pH Solutions at Different Temperatures

Acta Metall Sin

2004, Vol. 40

Issue (9): 967-971 DOI:

Research Articles

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Stress Corrosion Cracking Behavior of X70 PipelineSteel in Near-Neutral pH Solutions at Different Temperatures

GUO Hao; LI Guangfu; CAI Xun; YANG Wu

College of Materials Science and Engineering; Shanghai Jiaotong University; Shanghai 200030;Shanghai Research Institute of Materials; Shanghai 200437

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GUO Hao; LI Guangfu; CAI Xun; YANG Wu. Stress Corrosion Cracking Behavior of X70 PipelineSteel in Near-Neutral pH Solutions at Different Temperatures. Acta Metall Sin, 2004, 40(9): 967-971 .

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Abstract The stress corrosion cracking (SCC) behaviors of X70 pipeline steel in near-neutral pH solutions at different temperatures and applied potentials are studied with slow strain rate testing (SSRT). The results show that the cracking mode of X70 pipeline steel in near-neutral pH solutions is transgranular at different temperatures with the feature of quasi-cleavage. The susceptibility to SCC increases as the applied potential moved towards the cathodic direction. Hydrogen induced cracking (HIC) dominates the process. The value of pH decreases slightly with decreasing temperature of the solution, and the susceptibility to SCC increases.

Key words: pipeline steel stress corrosion cracking near-neutral pH solution

Received: 26 September 2003

ZTFLH:

TG172.8

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	GUO Hao
	LI Guangfu
	CAI Xun
	YANG Wu

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2004/V40/I9/967

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