TEMPERATURE INFERRING METHOD, METAL ELEMENT CONTENT PREDICTION METHOD, AND METAL ELEMENT CONTENT DECLINE TIME PREDICTION METHOD OF CORROSION RESISTANCE COATING

PROBLEM TO BE SOLVED: To provide a temperature inferring method of a corrosion resistance coating of a high-temperature member capable of grasping the surface temperature without actual measurement, and a metal element content prediction method and a metal element content decline time prediction method of the corrosion resistance coating. SOLUTION: In this method, the diffusion layer thickness from the surface of the corrosion resistance coating where diffusion processing of a metal element applied to the base material surface is applied to the interface between the corrosion resistance coating and the base material is determined by analyzing a plurality of portions of an actual machine, and the correlation between the interference diffusion layer thickness and the metal element content in the corrosion resistance coating is determined, and the metal element content is predicted based on the correlation. The time until the metal element content in the corrosion resistance coating declines up to the same level of the metal element content in the base material is predicted by using the correlation. A growth behavior of the interference diffusion layer is grasped by performing a heating test, and the correlation between the diffusion layer thickness and the temperature is determined, thereby inferring the temperature at the using time. COPYRIGHT: (C)2004,JPO