A corrosion-resistant article is proposed which is coated with an aluminum nitride wherein the aluminum nitride grains contain oxygen by 0.1 mass % or greater but not greater than 20 mass % so that the thermal expansion coefficient of the coating layer is made even with that of the base body; the relative density of the coating layer is preferably 50% or higher but lower than 98%. It is preferred that the coating layer is first made by chemical vapor deposition and then subjected to an oxidizing atmosphere of a temperature of 700 degrees centigrade or higher but 1150 degrees centigrade or lower; or it is preferable that after the chemical vapor deposition step the coating layer is exposed to the natural atmosphere to adsorb hydrate and then subjected to a heat treatment in an inert atmosphere of a temperature of 900 degrees centigrade but 1300 degrees centigrade or lower.