염화칼슘 수용액에서 철강의 부식에 미치는 부식억제제(아질산나트륨, 헥사메탄인산염, 트리에탄올아민, 설탕, 요소)의 영향

Abstract

Abstract

Effects of inhibitors (sodium nitrite, sodium hexametaphosphate, triethanolamine, sugar, and urea) on the corrosion of steel in a calcium chloride solution

Tae Jun Park Advisor: Prof. HeeJin Jang, Ph. D. Dept. of Advanced Materials Engineering Graduate School of Chosun University

Various kinds of corrosion inhibitors are added to deicing salt in order to reduce its corrosivity and we need to optimize the concentration of each additive to reach the low corrosivity and high deicing ability simultaneously. RSM (Response Surface Methodology), a type of DOE (Design of Experiment technique), was applied to examine the effects of each additive and find the optimum composition of the deicing agent. NaNO2, (NaPO3)6, TEA(Triethylamine), sugar, and urea were used asadditives in this study. CaCl2-based test solutions with these additives of different concentrations were designed by RSM. The corrosionrate of steels heet was e valuated in the test solutions by electrochemical potentiodynamic polarization tests. A statistical model was obtained for the corrosionrate, suggesting the main effect of each additive and interactions between additives quantitatively