Black oxide coating on Invar steel
인바강재의 흑화처리
김헌규;강탁;
Kim, H. G.;Kang, T.;
서울대학교 금속공학과;
Dept. of Metall. Eng., Seoul National Univ.;
Black magnetite film could be formed on Invar steel for shadows mask by iron electroplating in thickness of 0.46~0.63$mu extrm{m}$ on Invar steel and subsequent oxidation of iron by immersion in strongly alkaline soution for 30~60 minutes. blackness degreed of magnetite oxide film on Invar was C20BL90 in comparision of color chart of Dainippon Ink & Chemicals Inc. Co. and adhesion test showed excellent adhesion of oxide film on substrate. Magnetite oxide film grew up on iron in hot strongly alkaline solution according to `Sato-Cohen` oxide film growth model.
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