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논문 기본 정보

자료유형
학술저널
저자정보
A. Traidia (Research and Development Center Saudi Aramco) A. M. El-Sherik (Research and Development Center Saudi Aramco) H. Attar (Research and Development Center Saudi Aramco) A. Enezi (Research and Development Center Saudi Aramco)
저널정보
한국부식방식학회 Corrosion Science and Technology CORROSION SCIENCE AND TECHNOLOGY 제16권 제4호
발행연도
2017.8
수록면
201 - 208 (8page)
DOI
https://doi.org/10.14773/cst.2017.16.4.201

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초록· 키워드

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A finite element analysis is proposed to study the effect of specimen dimensions on lateral diffusion ofhydrogen during hydrogen permeation flux measurements. The error of measurement on thick specimensbecause of 1D diffusion approximation may be as much as 70%. A critical condition for accurate measurementsis to designate the area of hydrogen monitoring/exit surface smaller than the area of hydrogen charging/entrysurface. For thin to medium thickness specimens (ratio of thickness to specimen radius of 5:10 and below),the charging surface should be maximized and the monitoring surface should be minimized. In case ofrelatively thick specimens (ratio of thickness to specimen radius above of 5:10), use of a hydrogen-diffusionbarrier on the specimen boundaries is recommended. It would completely eliminate lateral losses of hydrogen,but cannot eliminate the deviation towards 2D diffusion near the side edges. In such a case, the chargingsurface should be maximized and the monitoring surface should be as closer in dimension as the chargingsurface. A regression analysis was carried out and an analytical relationship between the maximum measurementerror and the specimen dimensions is proposed.

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