Abstract
AbstractAbrasion of mild and stainless steel on a 3 M Company 120‐grade silicon carbide paper has been shown to increase the hydrogen content by 0·0049 and 0·0034 ml. per sq. cm. of apparent abraded area, respectively.The application of the results to the determination of hydrogen in steel is discussed and, in the particular case of mild‐steel sheet where the surface area may be as high as 200 sq. cm. per 100 g., the magnitude of the error due to abrasion on the above silicon carbide paper is sufficiently high to invalidate the determination of internal hydrogen on such materials unless appropriate corrections are made.
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