日本金属学会誌

J. Japan Inst. Metals, Vol. 21, No. 11 (1957),
pp. 625-628

Studies on Electrodeposited Chromium Film (2nd Report). On the Amount of Ununiformity of Hardness

Nobuteru Awa and Osamu Fusida


Abstract:

The hardness as well as the thickness of chromium plating film appeared less in sequence of the circumferential part the ends of the middle part and the center part and a 6 hrs plating produced the hardness of 1067,1007 and 964, respectively, the difference amounting to ± 8.5%. When the plating surface was however, ground and lapped (uniform accuracy : ± 0.001 mm), a perfect uniform hardness was,obtained over the three parts as shown in Table 2 : the hardness of the whole surface equally became 1200 ± 5.


(Received 1957/5/14)

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