PROCESSO E APARELHO PARA REVESTIMENTO ELETROLITICO DE UM SUBSTRATO COM UMA LIGA DE NIQUEL E/OU COBALTO FOSFORO,BANHO PARA ELETROREVESTIR UM SUBSTRATO COM UM REVESTIMENTO DE NIQUEL FOSFORO,PROCESSO PARA PRODUCAO DE UMA CONFIGURACAO DE PELICULA DE LIGA DE NIQUEL FOSFORO AMORFA DUCTIL RESISTENTE A CORROSAO POR ACIDO NITRICO E CONFIGURACAO DE PELICULA DE LIGA DE NIQUEL FOSFORO

摘要

Coatings comprising phosphorus, nickel and optionally cobalt are formed electrolytcally in a bath comprising phosphorus acid, phosphoric acid and nickel salt and optionally cobalt salts, and by maintaining the anode current density above 200 amperes per square foot, preferably 200 to 1250 amperes per square foot, so controlling the free acid content of the bath, eg between 9 to 14 acid titer. Ductile coatings comprising nickel and phosphorus are formed electrolytically using a bath liquid comprising nickel, phosphorus acid, phosphoric acid and hydrochloric acid.