Process for coating an article

摘要

A coating process (40) includes preheating (42) a workpiece having an aluminum-containing layer through a temperature range in a reducing atmosphere having hydrogen to limit formation of thermally grown oxides on the surface of the workpiece. A source of oxygen is introduced (44) to establish an oxidizing atmosphere at a temperature above the temperature range to form a desired type of thermally grown oxide on the surfaces of the workpiece. A coating is then deposited (46) on the desired type of thermally grown oxide.