METHOD FOR FORMING A METALLIC COATING ON STEEL PIPES

摘要

A method of applying a metallic coating to metallic sealing and/or threaded regions of steel pipes which are under high pressure per unit of surface by a pretreatment of the surface to be coated which consists of a cleaning and degreasing and an electrolytic deposition of a layer of tin by a first heat treatment at a temperature between about 150 DEG and about 200 DEG C. and a second brief heat treatment above the melting point of tin with subsequent cooling is provided. A metallic coating which is formed using said method is also provided.