Patent ID: 7005056
Filing Date: 2006-02-28
Classification: C25D

Abstract:
1. A method for inhibiting the corrosion of an alloy comprising the steps of: contacting at least a portion of a surface of the alloy with an aqueous solution, the aqueous solution comprising a salt of at least one element of the rare earth group selected from the group consisting of yttrium, gadolinium, cerium, europium, terbium, samarium, neodymium, praseodymium, lanthanum, holmium, ytterbium, dysprosium, erbium and combinations thereof; and establishing a voltage differential between an anode comprising the alloy and a cathode in the solution at an effective level and for a sufficient period of time wherein a rare earth element oxide-containing coating is formed on the surface of the alloy; wherein the effective level of the voltage differential is established by flowing a current not exceeding a current density of about 10 μA/cm 2 .