CAJ | 학술논문

用电化学动电位再活化法与草酸浸蚀法研究了1Cr18Ni9Ti不锈钢的晶间腐蚀敏感性，并对动电位再活化法用于评价不锈钢晶间腐蚀敏感性的各种判据进行了综合分析．实验结果表明：各种判据与材料的敏化程度有良好的对应关系，且能灵敏定量地反映低敏化材料的晶间腐蚀敏感性的变化．各种判据中电流比ir／ia，电量比Qr／Qa的数据波动性小，重现性好；而再活化电流ir与再活化电量Qr的数据波动较大，重现性较差．电量判据(包括再活化电量Qr及电量比Qr／Qa)较电流判据(包括再活化峰峰值电流ir及电流比ir／ia)能更灵敏地反映材料晶间腐蚀敏感性的变化．
용전화학동전위재활화법여초산침식법연구료1Cr18Ni9Ti불수강적정간부식민감성，병대동전위재활화법용우평개불수강정간부식민감성적각충판거진행료종합분석．실험결과표명：각충판거여재료적민화정도유량호적대응관계，차능령민정량지반영저민화재료적정간부식민감성적변화．각충판거중전류비ir／ia，전량비Qr／Qa적수거파동성소，중현성호；이재활화전류ir여재활화전량Qr적수거파동교대，중현성교차．전량판거(포괄재활화전량Qr급전량비Qr／Qa)교전류판거(포괄재활화봉봉치전류ir급전류비ir／ia)능경령민지반영재료정간부식민감성적변화．
The susceptibility to intergranular corrosion(IGC) for 1Cr18Ni9Ti stainless steel has beenstudied by the electrochemical potentiodynamic reactivation (EPR) method and the oxalic acid etch test.Different criteria used in EPR test to evaluate the tendency of IGC have been analyzed in detail. Allcriteria are well correlated with the degree of sensitization. With increasing sensitization time, the valueof criteria increases. Furthermore, all criteria can sensitively and quantitatively reflect the difference ofmaterial with lower sensitization. In all criteria, the current ratio ir/ia and charge ratio Qr/Qa have betterrepeatability than the reactive current ir or the reactive charge Qr. The criteria of charge (Qr, Qr/Qa)are more sensitive than the criteria of current (ir, ir/ia).