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迎春花叶提取物在H_2SO_4中对锌的缓蚀作用
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摘要
采用失重法和动电位极化曲线法研究了迎春花(Jasminum nudiflorum Lindl.)叶提取物(JNLLE)在0.01 mol·L~(-1)H_2SO_4介质中对锌的缓蚀作用。结果表明:JNLLE在0.01 mol·L~(-1)H_2SO_4溶液中对锌具有良好的缓蚀作用。缓蚀率随缓蚀剂浓度的增加而增大,但随温度的升高而降低。JNLLE在锌表面的吸附符合Langmuir吸附等温式。极化曲线表明,JNLLE为混合抑制型缓蚀剂。
The inhibition effect of Jasminum nudiflorum Lindl.leaves extract(JNLLE) on the corrosion of zinc in 0.01 mol · L~(-1) H_2SO_4 was investigated by weight loss and potentiodynaniic polarization curves methods.The results show that JNLLE acts as a good inhibitor in 0.01 mol · L~(-1) H_2SO_4.Inhibition efficiency increases with the concentration of JNLLE,while decreases with the temperature.The adsorption of JNLLE obeys Langniuir adsorption isotherm.Polarization curves show that JNLLE acts as a mixed-type inhibitor.
引文
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