METHOD FOR FORMING A PROTECTIVE COATING CONTAINING ALUMINUM ON THE SURFACE OF A METAL PART

摘要

The present invention relates to a method for forming a protective coating containing aluminum on the surface of a metal part, wherein said part is contacted with a carburizer made of an aluminum alloy, at a treatment temperature and in a chamber, the atmosphere of which contains an active gas which reacts with the carburizer to form a gaseous aluminum halide, which decomposes upon contacting the part while depositing aluminum metal thereon. The method is characterized in that the aluminum alloy of the carburizer includes at least one element, zirconium and/or hafnium, the active gas reacting with the carburizer to also form a halide of the reactive element which decomposes upon contacting the part while depositing said element thereon at the same time as the aluminum.