METHOD FOR PREVENTATIVE TREATMENT AGAINST THE RELEASE OF NICKEL IONS FROM A PART MADE OF A NICKEL AND CHROMIUM ALLOY

摘要

The invention relates to a method for preventative treatment against the release of nickel ions from a part made of a nickel and chromium alloy, the method comprising the formation of a surface layer of chromium(III) oxide (Cr2O3) by laser irradiation of the surface of the part, the laser irradiation being performed with a laser so as to obtain a power flux density absorbed by the part to be treated of between 2.107 W/cm2 and 2,7.107 W/cm2, and the part being made of an alloy comprising at least 59 wt. % of nickel and at least 29 wt. % of chromium.