月桂酰緩蝕劑在檸檬酸介質(zhì)中對(duì)Q235碳鋼的緩蝕行為月桂酰緩蝕劑在檸檬酸介質(zhì)中對(duì)Q235碳鋼的緩蝕行為Inhibition Behavior of Lauroyl Corrosion Inhibitor on Q235 Carbon Steel in Citric Acid Medium 采用失重法、電化學(xué)阻抗譜、極化曲線及量子化學(xué)計(jì)算研究了月桂酰兩性基單乙酸鈉在4.0%（質(zhì)量分?jǐn)?shù)，下同）檸檬酸溶液中對(duì)Q235碳鋼的緩蝕行為。結(jié)果表明，月桂酰緩蝕劑具有較好的緩蝕效果，當(dāng)其質(zhì)量分?jǐn)?shù)達(dá)到0.8%時(shí)，緩蝕率達(dá)到78.44%。電化學(xué)試驗(yàn)表明，該緩蝕劑在金屬表面以吸附的形式形成一種覆蓋膜，主要是以陽極抑制為主的混合型緩蝕劑。通過量子化學(xué)計(jì)算了緩蝕劑分子的LUMO、HOMO軌道能量，得出緩蝕劑羧基上的氧原子是吸附成膜的活性位點(diǎn)。 The corrosion behavior of sodium lauroamphoacetate corrosion inhibitor on Q235 carbon steel in 4.0% citric acid solution was studied by weight-loss experiment, electrochemical impedance spectroscopy (EIS), Tafel polarization curve and quantum chemistry calculation. Results show that the corrosion inhibitor has good effect on the corrosion of carbon steel, when the inhibitor mass fraction was 0.8%, its inhibition efficiency reached 78.44%. Electrochemical experiments show that the corrosion inhibitor is a kind of anodic type corrosion inhibitor, mainly as a form of adsorption on the metal surface to form a cladding. The LUMO and HOMO orbit energy were calculated by quantum chemistry calculation, the results show that corrosion inhibitor carboxyl O atom was adsorbed on the membrane of the active site.
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