Investigating the Impact of Post-Weld Cleaning and Passivation on the Performance of Austenitic Stainless Steel Using an EIS Paste-Electrolyte Cell

Studies were carried out on three reference SS304 stainless steel plates and on two welded SS304 plates. An innovative EIS paste-based cell is employed for this purpose. The study investigates the impact of mechanical cleaning, citric acid+sodium hydroxide (CA), and nitric acid (NA) passivation on welded SS304 stainless steel plates. Welded systems in both the heat-affected (HAZ) zone and base metal (BM) are being analyzed before and after each treatment. Specifically, one welded plate underwent mechanical cleaning, another was solely subjected to CA passivation, and a third received both mechanical cleaning and CA passivation.

本研究以三块参比级304不锈钢（SS304）板材及两块焊接304不锈钢板材为试验对象，采用一种新型基于电化学阻抗谱（Electrochemical Impedance Spectroscopy, EIS）浆料的测试池开展相关试验。本研究探究了机械清理、柠檬酸+氢氧化钠（CA）钝化以及硝酸（NA）钝化对焊接304不锈钢板材的影响，针对焊接试样的热影响区（heat-affected zone, HAZ）与母材（base metal, BM），在每种处理前后均开展了分析测试。具体而言，其中一块焊接板材仅接受机械清理处理，另一块仅实施CA钝化处理，第三块则同时完成机械清理与CA钝化处理。