CAJ | 학술논문

在PLINT微动磨损试验机上附加电化学测试系统,采用十字交叉接触方式,位移幅值为100μm,法向载荷20、50和80 N条件下,研究NC30Fe合金传热管在氯化钠溶液中的微动腐蚀行为。使用电化学工作站记录微动腐蚀过程中开路电位变化,运用电位扫描法测量微动过程的极化曲线；采用扫描电子显微镜观察磨痕的表面形貌,光学轮廓仪测定磨痕的三维形貌及磨损量。微动磨损使损伤区域金属原子活性增大,腐蚀倾向增大,加速了NC30Fe合金的腐蚀。在氯化钠溶液中,NC30Fe合金由于微动磨损过程产生腐蚀产物膜起到润滑减摩作用,摩擦系数较纯水中降低；但因腐蚀与磨损的交互作用,在氯化钠溶液中的磨损量比纯水中高。氯化钠溶液中的磨损机制主要表现为磨粒磨损和剥层的共同作用。
재PLINT미동마손시험궤상부가전화학측시계통,채용십자교차접촉방식,위이폭치위100μm,법향재하20、50화80 N조건하,연구NC30Fe합금전열관재록화납용액중적미동부식행위。사용전화학공작참기록미동부식과정중개로전위변화,운용전위소묘법측량미동과정적겁화곡선；채용소묘전자현미경관찰마흔적표면형모,광학륜곽의측정마흔적삼유형모급마손량。미동마손사손상구역금속원자활성증대,부식경향증대,가속료NC30Fe합금적부식。재록화납용액중,NC30Fe합금유우미동마손과정산생부식산물막기도윤활감마작용,마찰계수교순수중강저；단인부식여마손적교호작용,재록화납용액중적마손량비순수중고。록화납용액중적마손궤제주요표현위마립마손화박층적공동작용。
By adding an electrochemical test system on a PLINT fretting wear test machine, the fretting corrosion behavior of an NC30Fe heat transfer tube in a sodium chloride solution was investigated using cross-contacting configuration under different loading conditions, i. e. , three different normal loads of 20,50 and 80 N with a 100μm reciprocating amplitude. An electrochemical worksta-tion was used to record the open circuit potential during the fretting corrosion process, and the polarization curves were measured by the potential scanning method. The morphology of wear scars was observed by scanning electron microscopy. The 3D morphology and wear volume loss were determined by optical profilometry. It is found that metal atoms in the worn area are more active and more prone to corrosion because of fretting motion, leading to accelerated corrosion of NC30Fe alloy. As a result of lubrication action by the corro-sion product film, the friction coefficient in the sodium chloride solution is smaller than that in pure water. However, the wear volume loss in the sodium chloride solution is greater than that in pure water due to the interaction of corrosion and wear. Abrasive wear and delamination are considered to be the main wear mechanism in the sodium chloride solution.