Patent ID: 6203847
Filing Date: 2001-03-20
Classification: B23P,C23C,Y02T,Y10T

Abstract:
A method for restoring an environmental resistant coating of a coating total thickness within a coating design thickness range on a metal substrate of an article which has experienced service operation, the coating having an outer portion and an inner portion diffused with the metal substrate, the outer portion having at least one discrete local surface area on which are an undesirable amount of oxidation/corrosion products resulting from exposure to service operation, comprising the steps of:removing the oxidation/corrosion products at least from the discrete surface area of the outer portion while retaining any coating present at the discrete surface area and retaining the coating inner and outer portions on surface areas adjacent the discrete surface area; and then,applying an environmental resistant coating selected from the group consisting of aluminides and alloys including aluminum to at least the discrete surface area to fill the entire discrete surface area with said coating to a thickness substantially within the coating design thickness range.