다중선형회귀법을 활용한 예민화와 환경변수에 따른 AL-6XN강의 공식특성 예측

• Published in: Corrosion science and technology Vol. 19; no. 6; pp. 302 - 309
• Main Authors: 정광후, Kwang-hu Jung, 김성종, Seong-jong Kim
• Format: Journal Article
• Language: Korean
• Published: 한국부식방식학회 31.12.2020
• Subjects: AL-6XN; Corrosion characteristics; Environmental variable; Multiple linear regression; Sensitization; 금속공학; Corrosion characteristics; Sensitization; Multiple linear regression; AL-6XN; Environmental variable
• ISSN: 1598-6462; 2288-6524
• DOI: 10.14773/cst.2020.19.6.302

This study aimed to predict the pitting corrosion characteristics of AL-6XN super-austenitic steel using multiple linear regression. The variables used in the model are degree of sensitization, temperature, and pH. Experiments were designed and cyclic polarization curve tests were conducted accordingly. The data obtained from the cyclic polarization curve tests were used as training data for the multiple linear regression model. The significance of each factor in the response (critical pitting potential, repassivation potential) was analyzed. The multiple linear regression model was validated using experimental conditions that were not included in the training data. As a result, the degree of sensitization showed a greater effect than the other variables. Multiple linear regression showed poor performance for prediction of repassivation potential. On the other hand, the model showed a considerable degree of predictive performance for critical pitting potential. The coefficient of determination (R 2 ) was 0.7745. The possibility for pitting potential prediction was confirmed using multiple linear regression.