HYDROGEN ATTACK ON AUSTENITIC STEEL 304 UNDER HIGH TEMPERATURE AND HIGH PRESSURE

Acta Metall Sin

1993, Vol. 29

Issue (4): 73-76 DOI:

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HYDROGEN ATTACK ON AUSTENITIC STEEL 304 UNDER HIGH TEMPERATURE AND HIGH PRESSURE

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LI Xiaogang;CHEN Huan;YAO Zhiming;LI Jin;KE Wei Institute of Corresion and Protection of Metals; Academia Sinica; Shenyang lecturer;Institute of Corrosion and Protection of Metals;Academia Sinica; Shenyang 110015. HYDROGEN ATTACK ON AUSTENITIC STEEL 304 UNDER HIGH TEMPERATURE AND HIGH PRESSURE. Acta Metall Sin, 1993, 29(4): 73-76.

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Abstract Hydrogen attack on 304 austenitic stainless steel in the service for 2×10~4 h at450℃ under 5 MPa was detected to result from the occurrence of Cr_(23)C_6. The methane bub-bles were formed preferentially along grain boundaries and twin boundaries, and some ofthem in grains. Experimental results and thermodynamical analysis indicated that the Cr-de-pleted region around bubbles is not necessary condition in growth stage of bubbles.

Key words: hydrogen attack austenitic stainless steel methane bubbles Cr-depleted region

Received: 18 April 1993

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1993/V29/I4/73

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