ESTIMATION METHOD OF CORROSION, FATIGUE AND OPERATING LIFE OF STEEL MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method capable of reliably estimating corrosion, fatigue and operating life of a steel material.SOLUTION: The method for estimating corrosion, fatigue and operating life of a steel material: repeatedly applying a load to the steel material in a state a corrosive medium comes into contact with a predetermined portion of the steel material while measuring distortion on the steel material; measuring an N-th distortion index of magnitude of a distortion based on the magnitude of distortion when an initial load is applied and the magnitude of distortion when the N-th load is applied (N is a natural number greater than the number of application of the initial load); comparing the N-th distortion index and a prescribed operation life distortion index estimating corrosion, fatigue and operating life of a steel material.