Method and apparatus for depositing hard chrome coatings by brush plating

摘要

Thick layers of hard dense chromium coatings are formed on metal substrates by an electrolytic brush plating operation in which a lead-tin electrode having a porous polypropylene felt topped by an polypropylene molded brush element is maintained during coating continuously over the area to be electrolytically coated. The correct current density and flow of electrolytic coating solution as well as relative movement between the anode and brush element and the work piece are closely controlled to enable the hard chromium coating to be produced.