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METHOD FOR PREDICTING CORROSION RATE OF METAL, AND PREDICTION SYSTEM OF CORROSION LIFE OF METAL
METHOD FOR PREDICTING CORROSION RATE OF METAL, AND PREDICTION SYSTEM OF CORROSION LIFE OF METAL
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机译：金属腐蚀速率的预测方法及金属腐蚀寿命的预测系统
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摘要
PROBLEM TO BE SOLVED: To provide a method for predicting a corrosion rate of a metal and a prediction method of a corrosion life of a metal capable of predicting the corrosion rate and the corrosion life of the metal in a time shorter than that of the conventional one.;SOLUTION: This method for predicting the corrosion rate of a metal according to the present invention calculates an oxygen dissolution velocity RO2 to a water film by RO2=α×10-βcexp(-γT) using a salt level c in the water film attached to the surface of the metal, a temperature T and coefficients α, β, and γ; when the thickness L of the water film attached to the surface, a diffusion coefficient D of the oxygen diffusing the water film, and oxygen saturation concentration CO20 of the water film satisfy RO2D×CO20/L, an oxygen amount NO2 per unit time reaching a metal surface and per unit area is defined as NO2=D×CO20/L, when RO2≤D×CO20/L, then NO2=RO2, and the corrosion rate Rcor is predicted by Rcor=4×NO2×w/n by using the acquired NO2, a molar mass w of the metal and a valence n when the metal is ionized.;COPYRIGHT: (C)2012,JPO&INPIT
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