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利用葫芦巴种子提取物作为绿色腐蚀抑制剂,采用失重法和电化学方法研究锌在2.0 mol/L硫酸和2.0 mol/L盐酸中的腐蚀行为。扫描电子显微镜结果表明添加抑制剂后,锌的表面腐蚀得到减缓。光电子能谱分析表明腐蚀产物为Zn O,验证了抑制剂的吸收机理。当添加200 m L/L葫芦巴提取物时,在硫酸溶液中腐蚀1 h和盐酸溶液中腐蚀0.5 h可得到最大抑制率,分别为90.7%和66.6%。在HCl溶液中添加I-离子时,由于协同作用可大幅度提高葫芦巴种子提取物对锌腐蚀的抑制率。动电位极化和EIS分析表明葫芦巴种子提取物对锌在盐酸中的腐蚀有抑制作用。添加葫芦巴种子提取物可降低腐蚀电流,增加电荷转移电阻。
Fenugreek seed extract was used as a green corrosion inhibitor. The corrosion behavior of zinc in 2.0 mol / L sulfuric acid and 2.0 mol / L hydrochloric acid was investigated by weight loss method and electrochemical method. Scanning electron microscopy results showed that surface corrosion of zinc was slowed down with the addition of inhibitor. Photoelectron spectroscopy analysis showed that the corrosion product is Zn O, which verifies the absorption mechanism of the inhibitor. When 200 m L / L Fenugreek extract was added, the maximum inhibitory rate was 90.7% and 66.6% for 1 h in sulfuric acid solution and 0.5 h in hydrochloric acid solution, respectively. When I-ions are added to HCl solution, the inhibitory effect of fenugreek seed extract on zinc corrosion can be greatly enhanced due to the synergistic effect. Potentiodynamic polarization and EIS analysis showed that fenugreek seed extract inhibited zinc corrosion in hydrochloric acid. Adding fenugreek seed extract reduces corrosion current and increases charge transfer resistance.