METHOD FOR FORMING Re COATING FILM OR Re-Cr ALLOY COATING FILM THROUGH ELECTROPLATING

摘要

A method for forming a Re coating film or a Re−Cr alloy coating film through electroplating, wherein a Re−Cr alloy coating film having an atomic composition of 0 % < Re < 98 % and the balanced amount of Cr and inevitable impurities, a Re−Cr alloy coating film containing Re in an amount of 98 % or more and Cr and inevitable impurities in the balanced amount, a Re−Cr−Ni alloy coating film containing Re in an amount of not less than 50 % and less than 98 %, Cr in an amount of not less than 2 % and less than 45 % and Ni and inevitable impurities in the balanced amount, or the like is formed by the use of an electrolytic plating bath comprising an aqueous solution containing a perrhenate ion and a chromium (III) ion. The formation of a coating film of a Re−Cr alloy, Re or a Re−Cr−Ni alloy being used as a corrosion−resistant alloy coating film for a member of a high temperature device through an electroplating using an aqueous solution has allowed the impartation of high heat resistance and corrosion resistance also to a member of a device having a complicated shape, with ease and at a low cost.