Patent ID: 8505806

Claim:
A method for producing coated assembly parts intended for the production of a chemical or nuclear device element comprising a zirconium or zirconium alloy coating, wherein said assembly parts include a steel support part and at least one zirconium or zirconium alloy coating, the method consisting essentially of: (a) forming an initial assembly including a steel support part, a zirconium or zirconium alloy coating, and at least one brazing material between the support part and the coating, wherein said brazing material is an alloy including silver and copper; (b) inserting the initial assembly into a brazing chamber with a controlled atmosphere; (c) forming a controlled atmosphere in said chamber; and (d) reheating said assembly to a temperature at least equal to the melting temperature of said brazing material, so as to attach the zirconium coating to the support part; wherein prior to forming said initial assembly, a titanium or titanium alloy layer is deposited on said zirconium or zirconium alloy coating, and wherein said coating is placed so that the titanium- or titanium alloy-coated surface thereof is in contact with said brazing material, and wherein said brazing material includes silver and copper and is at least one selected from the group consisting of binary alloys having a eutectic composition with Ag between 67% and 75%, Ag—Cu—Zn ternary alloys, Ag—Cu—Zn—Sn quaternary alloys, and Ag—Cu—Zn—Cd quaternary alloys, wherein the brazing temperature is lower than the austenitisation temperature of the steel of the support.