Cassava starch-sodium allylsulfonate-acryl amide graft copolymer (CS-SAS-AAGC) was prepared by in situ polymerization of sodium allylsulfonate (SAS) and acryl amide (AA) in the presence of cassava starch (CS). The inhibition performance was tested by immersing aluminum in HCl solution using weight loss and electrochemical methods. CS-SAS-AAGC showed an inhibition efficiency as high as 95% at low inhibitor concentration of 100 mg/L. The inhibitive performance is much higher than that of CS, SAS, AA, CS/AA, CS/SAS or CS/AA/SAS mixture. The adsorption of CS-SAS-AAGC on aluminum surface was found to obey Langmuir adsorption isotherm. CS-SAS-AAGC behaves as a mixing-type inhibitor, while mainly inhibiting the cathodic reaction. Electrochemical impedance spectroscopy (EIS) has two time constants with a large capacitive loop at high frequencies followed by also a large inductive one at low frequencies. The inhibition of aluminum surface by CS-SAS-AAGC is evidenced through scanning electron microscope (SEM) and contact angle images. The adsorption mechanism was theoretically analyzed by quantum chemical calculation and molecular dynamic (MD) simulation.

木薯淀粉-烯丙基磺酸钠-丙烯酰胺接枝共聚物（CS-SAS-AAGC）是在木薯淀粉（CS）存在下，通过烯丙基磺酸钠（SAS）和丙烯酰胺（AA）原位聚合制备的。通过使用重量损失和电化学方法将铝浸入HCl溶液中来测试其抑制性能。CS-SAS-AAGC在抑制剂浓度低至100 mg / L时显示出高达95％的抑制效率。抑制性能远高于CS，SAS，AA，CS / AA，CS / SAS或CS / AA / SAS混合物。发现CS-SAS-AAGC在铝表面上的吸附遵循Langmuir吸附等温线。CS-SAS-AAGC充当混合型抑制剂，同时主要抑制阴极反应。电化学阻抗谱（EIS）具有两个时间常数，在高频时具有较大的电容环路，在低频时还具有较大的电感环路。通过扫描电子显微镜（SEM）和接触角图像可以证明CS-SAS-AAGC对铝表面的抑制作用。通过量子化学计算和分子动力学（MD）模拟对吸附机理进行了理论分析。