In the present study, we have synthesized two novel corrosion inhibitors BP-1 and BP-2 and evaluated their corrosion inhibition property on mild steel (MS) in acid solution through weight loss and electrochemical corrosion techniques. The corrosion test results reveal that both compounds inhibit corrosion by an adsorption mechanism and display inhibition efficiency more than 95% at a low concentration of 1.72 × 10^–4 M. From the surface analysis of the protective film on MS, it was corroborated that adsorption of inhibitor molecules occurred on the MS surface through chemisorption, which further suppresses the corrosion rate. Density functional theory simulated data helps correlate the experimental trend with the theoretical study.

中文翻译：

---

双吡喃并吡唑类作为盐酸中低碳钢的绿色缓蚀剂：实验和理论方法

在本研究中，我们合成了两种新型缓蚀剂BP-1和BP-2，并通过失重和电化学腐蚀技术评估了它们在酸性溶液中对低碳钢（MS）的缓蚀性能。腐蚀试验结果表明，两种化合物均通过吸附机理抑制腐蚀，在低浓度1.72×10 ^–4 M时显示出95％以上的抑制效率。从MS上保护膜的表面分析可以证实吸附通过化学吸附在MS表面上生成抑制剂分子，从而进一步抑制了腐蚀速率。密度泛函理论模拟数据有助于将实验趋势与理论研究联系起来。