In this work, the method (water extraction way) was uesd to acquire Artocarpus heterophyllus Lam leaves extract (AHLLE). We refer to the relevant references on the composition of Artocarpus heterophyllus Lam leaves and perform Fourier infrared spectroscopy analysis for AHLLE. It can be concluded that AHLLE contains 2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-4H-chromen-4-one (DPD), (2R,3R)-2-(2,4-dihydroxyphenyl)-3 ,5,7-trihydroxychroman-4-one (DPT), 3-(4-hydroxyphenyl)acrylic acid (HPT), and 5-(6-hydroxybenzofuran-2-yl)benzene-1,3-diol (HBB). Quantum chemical calculations (QCC) data and molecular dynamics (MD) simulations results show that DPD, DPT, HPT, and HBB all have the potential of excellent corrosion inhibitors. Scanning electron microscope (SEM) results and atomic force microscope (AFM) test results show that after adding AHLLE to H₂SO₄ environment, the copper surface is still correspondingly flat. In addition, the results of electrochemical experiments indicate that the AHLLE is 500 ppm, the anti-corrosion efficiency obtained from electrochemical impedance spectroscopy data can reach 97.3%. With the temperature augments to 313 K, the corrosion inhibition nature of AHLLE can still be maintained to 97%. AHLLE is adsorbed onto the Cu surface and belongs to Langmuir monolayer adsorption.

本工作采用水提法获得紫檀叶提取物(AHLLE)。我们参考了紫檀叶成分的相关参考文献，对AHLLE进行了傅里叶红外光谱分析。可以得出AHLLE含有2-(2,4-dihydroxyphenyl)-5,7-dihydroxy-4H-chromen-4-one (DPD), (2R,3R)-2-(2,4-dihydroxyphenyl)- 3 ,5,7-trihydroxychroman-4-one (DPT)、3-(4-hydroxyphenyl) 丙烯酸 (HPT) 和 5-(6-hydroxybenzofuran-2-yl)benzo-1,3-diol (HBB) . 量子化学计算 (QCC) 数据和分子动力学 (MD) 模拟结果表明，DPD、DPT、HPT 和 HBB 均具有优良缓蚀剂的潜力。扫描电子显微镜（SEM）结果和原子力显微镜（AFM）测试结果表明，添加 AHLLE 到 H₂ SO ₄环境下，铜面仍相应平坦。此外，电化学实验结果表明，AHLLE为500 ppm，电化学阻抗谱数据得到的防腐效率可达97.3%。随着温度升高到 313 K，AHLLE 的缓蚀性质仍可保持在 97%。AHLLE吸附在Cu表面，属于Langmuir单层吸附。