Effect of Temperature and Acid Environment on Galvanic Corrosion of 6082 Coupled with SUS304

This study investigates the influence of different temperatures and acidic environments on the galvanic corrosion of 6082 aluminum alloy coupled with SUS304 stainless steel. Through electrochemical tests, surface morphology analysis, and composition analysis, the synergistic effects of temperature and acidic environments on the corrosion process were examined. The results indicate that the effect of temperature on the galvanic corrosion of 6082 follows the Arrhenius equation, with an activation energy (Ea) of 21.165 kJ/mol without acid and 24.485 kJ/mol with acid, suggesting that temperature has a more pronounced effect in acidic environments. Additionally, Cl⁻ and SO₄²⁻ exhibit a synergistic effect on the corrosion of 6082, accelerating the conversion of Al₂O₃ to AlCl₃, although Cl⁻ remains the primary factor influencing the corrosion morphology. This study provides new insights into the corrosion behavior of aluminum alloys and stainless steel in complex environments, offering significant industrial application value.