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木質(zhì)素磺酸鈉對(duì)3.5%NaCl溶液中AZ31鎂合金的緩蝕作用
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太原理工大學(xué)材料科學(xué)與工程學(xué)院

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Inhibiting Effect of Sodium Lignosulphonate on the Corrosion of AZ31 Magnesium Alloy in NaCl Solution
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College of Materials Science and Engineering, Taiyuan University of Technology

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    摘要:

    采用失重法，極化曲線，電化學(xué)阻抗譜和掃描電子顯微鏡研究木質(zhì)素磺酸鈉(SLS)在質(zhì)量分?jǐn)?shù)為3.5%NaCl溶液中對(duì)AZ31鎂合金的緩蝕作用。結(jié)果表明：在298K時(shí)SLS可有效抑制AZ31在NaCl介質(zhì)中的腐蝕。當(dāng)SLS為4.0g?L-1時(shí)，緩蝕率可達(dá)到最大。提高濃度后，其緩蝕率會(huì)下降。SLS是陰極型緩蝕劑，并且SLS在AZ31表面的吸附符合langmuir吸附模型。由吸附自由能G0及Arrhenius活化能Ea知，SLS在AZ31鎂合金表面是化學(xué)吸附。

    Abstract:

    The inhibition effects of sodium lignosulphonate (SLS) have been studied by means of weight loss method, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results showed that sodium lignosulphonate (SLS) could inhibit effectively the corrosion for AZ31 magnesium alloy in 3.5% NaCl solution, and that the consisting of 4.0 g/L SLS is of an inhibition efficiency higher to 75.4%. SLS is an anion inhibitor and the adsorption of SLS on the AZ31 magnesium alloy surface obeys to the Langmuir adsorption isotherm which due to the adsorption free energy ?G0 and the Arrhenius active energy Ea.

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侯利鋒.木質(zhì)素磺酸鈉對(duì)3.5%NaCl溶液中AZ31鎂合金的緩蝕作用[J].稀有金屬材料與工程,2016,45(6):1600~1604.[Hou Lifeng. Inhibiting Effect of Sodium Lignosulphonate on the Corrosion of AZ31 Magnesium Alloy in NaCl Solution[J]. Rare Metal Materials and Engineering,2016,45(6):1600~1604.]
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  • 收稿日期:2014-05-22
  • 最后修改日期:2014-09-10
  • 錄用日期:2015-02-06
  • 在線發(fā)布日期: 2016-10-08
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