Patent ID: 6491766
Filing Date: 2002-12-10
Classification: C23C,C25B,Y10T

Abstract:
A process for the production of a coated nickel body comprising the following steps:a) covering a nickel body with a dispersion consisting essentially of aluminum powder in a dispersing medium to form a first coating on the nickel body; b) drying the first coating to remove a portion of the dispersing medium to form an aluminum powder coating on the nickel body; c) heating the nickel body bearing the aluminum powder coating in a furnace in a hydrogen or inert atmosphere so that any remaining portion of the dispersing medium is removed and the aluminum diffuses into the surface of the nickel body to form an intermediate coating; and d) leaching out at least a portion of the aluminum in the intermediate coating by contacting the intermediate coating with a leaching medium, wherein said dispersing medium consists essentially of a binder/solvent system.