Alloy Plating Using a Particle Occlusion Method.
Allison JE; Smith GR
71st Annu tech conf Am Electroplat Soc Winter Park Florida 1984 :1-14
As part of a broad research program on conservation of critical metals, the Bureau of Mines studied a modified aqueous electrodeposition method for preparing stainless steel type alloy coatings. Chromium powder ( -2 um) was suspended in an fe-ni alloy electroplating bath and occluded in the alloy electrodeposit matrix. The occlusion process was significantly affected by the composition of the electrodeposited matrix. A maximum quantity was occluded when the electrodeposited matrix consisted of a crystallographic dual-phase v(ni,fe)-a(fe,ni) structure. Up to 21 wt pct cr was occluded from cr powder suspensions of 20 vol pct. Heat treatment at 800 deg to 1,100 deg c served to homogenize the composite coatings. An interdiffusion region of - 80 um was observed at the aisi 1020 substrate-alloy coating interface after heat treatment of a 125-um-thick composite coating. Martensitic type stainless steel coatings have been produced.
71st Annu.tech.conf., Am. Electroplat. Soc., Winter Park, Florida, 1984, PP. 1-14