Analysis of Corrosion Potential Changes and Tensile Strength of Stainless Steel 304 After Thermal Loading

Abstract

This study investigates the effects of thermal loading at 650°C and subsequent heat treatment at 450°C on the corrosion potential, tensile strength, and microstructure of Stainless Steel 304. Thermal loading increased the corrosion potential from 387 V to 569 V and reduced tensile strength from 3596.06 MPa to 3151.39 MPa, indicating heightened vulnerability to corrosion and mechanical degradation. Heat treatment for durations of 2, 4, and 6 hours gradually restored the material's properties, with corrosion potential decreasing to 391 V and tensile strength improving to 3729.62 MPa after 6 hours. Microstructural analysis revealed a reduction in dislocation density and restoration of grain boundary integrity post-treatment. Elemental analysis confirmed the redistribution of chromium and iron as a key factor in enhancing the material's performance. These findings underscore the importance of post-thermal heat treatment in restoring the functional properties of Stainless Steel 304 for industrial applications.