This study investigates the efficacy of ZnCl2 as a corrosion inhibitor for mild steel across varied pH environments (3.5, 7, and 10). Findings highlight a significant reduction in corrosion rates with increasing ZnCl2 concentrations, pinpointing optimal levels at 350 ppm (pH 3.5), 575 ppm (pH 7), and 325 ppm (pH 10). Through comprehensive experimental analyses, the study robustly validates the protective capacity of the inhibitor, shedding light on its practical application in safeguarding metallic materials amidst varying pH conditions. ZnCl2 will be applied as a solution, forming a protective layer on the surface of mild steel, thereby acting as a barrier against corrosive agents. The study's originality lies in its specific exploration of ZnCl2 efficiency under varied pH conditions, emphasizing its substantial contribution to corrosion protection in different environmental settings.