Abstract

Anticorrosive conductive coatings were prepared by adding solvents, dispersants, nickel powders, etc. to acrylic resin coatings with high viscosity, and conductive coatings were prepared on the surface of Q235 steel. The effects of nickel powder contents on the corrosion resistance of the conductive coating were investigated in a red soil solution, for which electrochemical impedance spectroscopy, Tafel polarization curve and corrosion morphology analysis were used. Adding different concentrations of Fe₂(SO₄)₃ to the red soil solution, the effect of Fe₂(SO₄)₃ content on the corrosion resistance of the conductive coating was studied. The results show that anti-corrosion performance of the coating material is variable according to the degree of hydrolysis. Besides, the content of nickel powder and Fe₂(SO₄)₃ is also related to the anti-corrosion performance. The higher the content of nickel powder, the worse the corrosion resistance. The higher the content of Fe₂(SO₄)₃ in the red soil solution, the lower the coating impedance and the worse the corrosion resistance. Fe₂(SO₄)₃ will accelerate the corrosion reaction. A Fe₂(SO₄)₃ catalyzed kinetic mechanism is advanced to expound accelerated corrosion process.

中文翻译：

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富镍导电涂层在红壤中的防腐性能及Fe2(SO4)3对其耐蚀性的影响

摘要

在高粘度的丙烯酸树脂涂料中加入溶剂、分散剂、镍粉等制备防腐导电涂料，在Q235钢表面制备导电涂料。在红土溶液中研究了镍粉含量对导电涂层耐腐蚀性能的影响，为此采用了电化学阻抗谱、塔菲尔极化曲线和腐蚀形貌分析。在红土溶液中加入不同浓度的Fe ₂ (SO ₄ ) ₃，Fe ₂ (SO ₄ ) _{3 的作用}对导电涂层耐腐蚀性能的影响进行了研究。结果表明，涂​​层材料的防腐性能根据水解程度而变化。此外，镍粉和Fe ₂ (SO ₄ ) _{3 的}含量也与防腐性能有关。镍粉含量越高，耐腐蚀性越差。红土溶液中Fe ₂ (SO ₄ ) ₃含量越高，涂层阻抗越低，耐腐蚀性越差。Fe ₂ (SO ₄ ) ₃会加速腐蚀反应。A Fe ₂ (SO ₄) _{3 提出}催化动力学机理，阐述加速腐蚀过程。