It is of great significance to develop high-efficiency and green corrosion inhibitors for Q235 steel under acidic conditions. In this study, resveratrol was chemically modified to resveratrol-3-O-β-D-glucopyranoside (R3GP) in order to increase its solubility and complexation ability with metal ions. The obtained electrochemical analysis results indicated that R3GP was an anode-based mixed inhibitor, whose inhibitive efficiency was obviously higher than that of resveratrol (400 mg/L, 90.33% versus 69.52%). The adsorption of R3GP over steel surface followed Langmuir isotherm, and the inhibition efficiency was still maintained 82.60% at 328 K. Surface analyses (SEM and AFM) proved the existence of R3GP on Q235 steel surface to form a corrosion-protective film. Quantum chemistry calculations revealed the R3GP molecule could be more stable on Q235 steel surface. Molecular dynamic simulations also manifested that R3GP was absorbed more strongly on the metal surface in a parallel mode and had a large bind energy (561.66 kJ/mol).

开发酸性条件下Q235钢的高效绿色缓蚀剂具有重要意义。在这项研究中，白藜芦醇被化学修饰为白藜芦醇-3 - O - β - D-吡喃葡萄糖苷（R3GP），以增加其溶解度和与金属离子的络合能力。电化学分析结果表明，R3GP是一种阳极基混合抑制剂，其抑制效率明显高于白藜芦醇（400 mg/L，90.33% vs.69.52%)。R3GP在钢表面的吸附遵循Langmuir等温线，在328K下抑制效率仍保持82.60%。表面分析（SEM和AFM）证明R3GP在Q235钢表面存在形成腐蚀保护膜。量子化学计算表明 R3GP 分子在 Q235 钢表面上可能更稳定。分子动力学模拟还表明，R3GP 在金属表面以平行模式被更强烈地吸收，并具有较大的结合能（561.66 kJ/mol）。