Corrosion studies on post-weld heat treated dissimilar AISI 2205 and AISI 310 joints using electrochemical noise analysisGovindasamy, Mahadevan (Avtor) Mangalakaran, Lloyd Jenner Joseph Manuel (Avtor) Thamilkolunthu, Senthilkumar (Avtor) AISI2205corrosionelectrochemical impedance spectroscopyCa▫$Cl_2$▫The corrosion behavior of dissimilar weldments between AISI310 and AISI2205 stainless steels in a 5 % calcium chloride solution at 50 °C was investigated under three conditions: as-welded, lower post-weld heat treatment at 800 °C, and higher post-weld heat treatment at 1000 °C. Microstructural examination revealed severe pitting in the as-welded sample, with pit widths ranging from 270 μm to 360 μm. The lower heat-treated sample had larger pits (310 μm to 370 μm), while the higher heat-treated sample showed homogeneous corrosion with a protective oxide coating. The as-welded sample had the highest corrosion rate, followed by the lower heat-treated sample, which had a moderate rate, and the higher heat-treated sample had the lowest rate. The corrosion current densities were 5,26 × ▫$10^{-3}$▫ mA/cm², 4,6 × ▫$10^{-4}$▫ mA/cm² and 1,4 × ▫$10^{-4}$▫ mA/cm², respectively. Electrochemical noise measurements confirmed these findings, with the higher heat-treated sample showing negligible localized corrosion and homogenous corrosion behavior.20252025-03-04 12:31:23Neznano167617UDK: 621ISSN pri članku: 2536-3948DOI: 10.5545/sv-jme.2024.1084COBISS_ID: 227927811sl