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首页> 外文期刊>Journal of Materials Engineering and Performance >Influence of Near-Surface Severe Plastic Deformation of Mild Steel on the Inhibition Performance of Sodium Molybdate and 1H-Benzotriazole in Artificial Sea Water
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Influence of Near-Surface Severe Plastic Deformation of Mild Steel on the Inhibition Performance of Sodium Molybdate and 1H-Benzotriazole in Artificial Sea Water

机译：轻度钢近表面重度塑性变形对人工海水中钼酸钠和1H-苯并三唑抑制性能的影响

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摘要

The effects of near-surface severe plastic deformation (NS-SPD) on the inhibition performance of sodium molybdate (SM) and 1H-benzotriazole (BTA) for mild steel were investigated using weight loss, polarization and electrochemical impedance spectroscopy measurements. The crystal grain size of NS-SPD-processed surface was analyzed by x-ray diffractometry and field emission scanning electron microscopy. A deformed layer with thickness of 20 +/- 5 A mu m was produced on mild steel surface after NS-SPD process due to accumulated strains. The NS-SPD process caused more effective adsorption of corrosion inhibitors due to the fabrication of a surface with a high density of preferential adsorption sites. However, the stability of protective layer was predominantly influenced by the effect of NS-SPD process on inhibition efficiency. The fairly good persistence of protective layer formed on the surface by SM-containing solution and also positive effect of NS-SPD process on adsorption of molybdate ions caused higher inhibition performance for sodium molybdate. However, NS-SPD process encouraged deterioration of protective layer formed on steel surface in the presence of BTA inhibitor. It was ascribed to partial coverage of surface, low stability of adsorbed layer and thus more adsorption of aggressive ions on unprotected area which was uncovered during immersion time.
机译：使用体重减轻，极化和电化学阻抗光谱测量研究了近表面重度塑性变形（NS-SPD）对钼酸钠（SM）和1H-苯并三唑（BTA）的抑制性能的影响。通过X射线衍射测定和场发射扫描电子显微镜分析NS-SPD处理表面的晶粒尺寸。在NS-SPD过程由于累积的菌株而在温和的钢表面上产生厚度为20 +/- 5a mu m的变形层。由于具有高密度的优先吸附位点的表面，NS-SPD方法导致腐蚀抑制剂的吸附更有效。然而，保护层的稳定性主要受NS-SPD方法对抑制效率的影响的影响。通过SM含SM通过SM表面形成的保护层的相当良好的持续性以及NS-SPD方法对钼酸盐离子吸附的阳性作用导致钼酸钠的抑制性能较高。然而，在BTA抑制剂存在下，NS-SPD工艺促进在钢表面上形成的保护层的劣化。它归因于表面的部分覆盖，吸附层的低稳定性，从而在浸渍时间内未被覆盖的未受保护区进行侵蚀性离子的吸附。

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