METHOD OF ENHANCING THE CORROSION RESISTANCE OF STEEL, INCLUDING SINKING STEEL IN ACIDIC AQUEOUS SOLUTION AND FORMING Cr2O3 PASSIVATION LAYER ON THE STEEL SURFACE

摘要

PURPOSE: A method of enhancing the corrosion resistance of steel is provided to reduce the possibility of corrosion between MnO and Cr2O3 passivation layer in the steel.;CONSTITUTION: A method of enhancing the corrosion resistance of steel comprises steps of: sinking a steel material in acidic aqueous solution for the designated time in order to remove oxide produced on the steel material through high-temperature heat treatment, forming Cr203 passivation layer on the surface of the steel material, and washing off the acidic aqueous solution remaining in the surface of the steel material.;COPYRIGHT KIPO 2011