The invention belongs to the technical field of
metal impregnation, and particularly relates to a
slurry chromium impregnation permeating agent
slurry and
chromium impregnation layer preparing method. The method is used for preparing a permeating layer capable of improving
surface corrosion resistance,
wear resistance and high-
temperature resistance performance of a
metal material product. The method comprises the steps that a protecting sleeve is used for the non-permeating-layer portion of a cleaned part for protecting, and therefore the portion cannot be coated with permeating agent
slurry; the portion, required to be subject to
chromium impregnation, of the part is evenly coated with the permeating agent slurry, and the thickness of a
coating layer ranges form 1.5 mm to 2.0 mm; after the
coating layer is dried, the part is subject to chromium impregnation in a vacuum tank under the protection
atmosphere protection, in the chromium impregnation process, the heat preservation temperature ranges from 1040 DEG C to 1090 DEG C, the heat preservation time ranges from 5 h to 10 h, furnace cooling to the temperature below 300 DEG C is carried out, and during furnace cooling, the pressure is 0.5 to 1.0 time of the standard
atmospheric pressure. Metallurgical bonding is achieved, it is ensured that the
coating can be tightly combined with a base body and is not prone to falling off, the depth of the prepared chromium impregnation layer ranges from 0.005 mm to 0.020 mm, and the chromium impregnation surface shows the silver gray.