METHOD FOR PREDICTING FATIGUE LIFE OF METAL IN SEA WATER ENVIRONMENT

摘要

The present invention relates to a method for predicting the corrosion life of stainless steel in a seawater corrosion atmosphere, conventionally relying on a statistical method, there was a problem that the fastness is poor. The present invention is a numerical modeling method of stainless steel composition, bush current density, crack shape, initial pH, Cl acidity concentration, diffusion coefficients of chemical ions derived from known or experimental compositions, electron singers, And various constants, etc., to calculate the concentration change, pH change, and potential change over time, and when the calculated concentration exceeds the threshold or the potential exceeds the threshold potential, the time required for the change to the corresponding concentration is determined. Provides a method for predicting corrosion levels of metals, especially stainless steels, under seawater conditions measured by corrosion start time.