EFFECT OF PERMEATION AREA RADIO AND SHAPE OF SPECIMEN ON HYDROGEN PERMEATION AND APMRENT DIFFUSION COEFFICIENT

J Chin Soc Corr Pro

1995, Vol. 15

Issue (2): 119-123 DOI:

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EFFECT OF PERMEATION AREA RADIO AND SHAPE OF SPECIMEN ON HYDROGEN PERMEATION AND APMRENT DIFFUSION COEFFICIENT

Liu Lun;Qian Line;Yu Guanghua;Chu Wuyang (Univ. of Sci. Tech. Bdijing)(Tianjin Normal Univ.)

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Abstract The effect of the ratio of permeation area to the specimen area ζ and the shape of the specimenon hydrogen permeation of copper has been studied using the Devanathan's double electrolytic cell. Theresults show that only when the permeation area ratio ζ exceeds a critical value ζc, which depends on thegeometric shape, can the hydrogen permeation curve and the apparent diffusion coefficient be measured.The ζc has the smallest value for a circular specimen and the highest value for a polygonal one. Theapparent diffusion coefficient measured increases with increasing permeation area ratio ζ. A circularspecimen with a large permeation area ratio is the most ideal one for hydrogen permeation test at roomtemperature.

Key words: Hydrogen permeation Apparent diffusion coefficient Specimen shape

Received: 25 April 1995

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Liu Lun;Qian Line;Yu Guanghua;Chu Wuyang (Univ. of Sci. Tech. Bdijing)(Tianjin Normal Univ.). EFFECT OF PERMEATION AREA RADIO AND SHAPE OF SPECIMEN ON HYDROGEN PERMEATION AND APMRENT DIFFUSION COEFFICIENT. J Chin Soc Corr Pro, 1995, 15(2): 119-123.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I2/119

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