To alleviate the ever-increasing concerns about environmental protection, developing green, environmentally friendly, and efficient corrosion inhibitors for metal materials in corrosive environment is important. Herein, an eco-friendly pyridazine derivative, 2-((6-chloropyridazin-3-yl)thio)-N,N-diethylacetamide (CPD), was explored as an efficient inhibitor for Cu in 0.5 mol/L H₂SO₄ via electrochemical/surface-analytical experiments and theoretical calculations at 298 K, 303 K, 308 K, and 313 K. The experimental studies demonstrate that CPD is a modest cathodic corrosion inhibitor and its adsorption onto the copper/solution surface accord with the Langmuir monolayer adsorption; thus, the coordination bonds between CPD and Cu were discussed. Theoretical calculations further revealed the mechanism of inhibition of CPD. This work may provide additional insights into the use of high-performance inhibitors for Cu.

为了减轻对环境保护的日益增长的关注，开发在腐蚀环境中用于金属材料的绿色，环保，有效的缓蚀剂非常重要。本文研究了生态友好的哒嗪衍生物2-（（6-chloropyridazin-3-yl）thio）-N，N -diethylethylacetamide（CPD）作为有效的0.5 mol / LH ₂ SO _4中的Cu抑制剂。通过电化学/表面分析实验和298 K，303 K，308 K和313 K的理论计算。实验研究表明CPD是适度的阴极腐蚀抑制剂，其吸附在铜/溶液表面上符合Langmuir单层吸附 因此，讨论了CPD与Cu之间的配位键。理论计算进一步揭示了抑制CPD的机制。这项工作可能会提供有关使用高性能铜抑制剂的更多见解。