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Experimental and theoretical studies of triisopropanolamine as an inhibitor for aluminum alloy in 3% NaCl solution

机译：三异丙醇胺作为3％NaCl溶液中铝合金抑制剂的实验与理论研究

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摘要

The inhibition performance and mechanism of triisopropanolamine (TIPA) for the corrosion of aluminum alloy in 3% NaCl solution were investigated using weight loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM). The electrochemical results revealed that TIPA was an effective inhibitor and the inhibition efficiency increased with the increasing concentrations of TIPA, which was further confirmed by SEM observation. Potentiodynamic polarization studies revealed that TIPA acted as a mixed-type inhibitor. The adsorption of TIPA on the aluminum surface obeyed a Langmuir thermodynamic-kinetic model, and the thermodynamic and kinetic parameters meant that the interaction between the inhibitor and the surface of aluminum alloy involved both physisorption and chemisorption. Moreover, theoretical calculations were used to investigate inhibition mechanism of the studied inhibitor. The results showed that TIPA molecule could adsorbed on Al substrate spontaneously and chelated with Al atom due to the hydroxyl group.
机译：使用减肥方法，电位偏振，电化学阻抗光谱（EIS）和扫描电子显微镜（SEM）研究了三异丙醇胺（TIPA）在3％NaCl溶液中耐铝合金腐蚀的抑制性能和机制。电化学结果表明，Tipa是一种有效的抑制剂，并且随着SEM观察进一步证实的，抑制效率随着钛的浓度进一步证实。电位动力学偏振研究表明，Tipa用作混合型抑制剂。 Tipa对铝表面的吸附遵循了Langmuir热力学 - 动力学模型，以及热力学和动力学参数意味着抑制剂和铝合金表面之间的相互作用涉及物理化和化学吸附。此外，使用理论计算来研究研究抑制剂的抑制机制。结果表明，由于羟基，Tipa分子可自发地吸附在Al底物上并与Al原子螯合。

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  • 来源
    《RSC Advances》 |2015年第123期|共8页
  • 作者

    Ren Xiaolei; Xu Shenying; Chen Siyi; Chen Nanxi; Zhang Shengtao;

  • 作者单位

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400044 Peoples R China;

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400044 Peoples R China;

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400044 Peoples R China;

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400044 Peoples R China;

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400044 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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