Procedure for anticorrosion proteccdion of parts made of thermally resistant steel.

摘要

Process for the corrosion protection of parts (46) of heat resistant steel, especially for the corrosion protection of boiler tubes made from chrome steel in which the surface is to be protected by a deposition process in gas phase, especially by a CVD process, with at least a gas containing the treatment gas, preferably in non-oxidizing atmosphere, preferably at a temperature between 1000 ° C and 1200 ° C, said gas treatment is carried out in several cycles of treatment (26 ), with broadcast cycles (28) inserted between treatment cycles (26), said process gas is selected from the group consisting of chlorides of elements of IIb, IIIb, IVa and IVb of the periodic Table, and said treatment gas is advantageously chosen from the group consisting of SiCl4, TiCl4, AlCl3 and ZnCl