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Active corrosion inhibition of mild steel by environmentally-friendly Ce-doped organic-inorganic sol-gel coatings

机译:环保型CE掺杂有机 - 无机溶胶涂层的温和钢的主动腐蚀抑制

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摘要

The anticorrosive properties of different coatings on mild steel are insufficient and chromate corrosion protection is being eliminated owing to its toxicity. This paper shows an anti-corrosion bi-layer environmentally-friendly sol-gel coating doped with cerium (26 mm thick) on mild steel, combining a barrier effect with self-healing. Both layers have a siloxane-methacrylate composition based on the combination of a silicon alkoxide, a monomer and an organically modified silicon alkoxide as a crosslinker. Well-adhered coatings, with excellent barrier properties and current densities as low as 10(-12) A cm(-2) and impedances of 10(10) ohm cm(2), are demonstrated. Electrochemical measurements (EIS and polarization tests), SEM-EDX and micro-Raman analysis indicate depletion of Ce around defects and higher concentrations in the defect, supporting the activation of a self-healing process.
机译:不同涂层对温和钢的防腐性能不足,由于其毒性,消除了铬酸盐腐蚀保护。 本文显示了一种掺杂有铈(26mm厚)的防腐蚀双层环保溶胶涂层,在轻度钢上,与自愈合相结合。 两层基于硅醇盐,单体和有机改性硅醇盐作为交联剂的组合具有硅氧烷 - 甲基丙烯酸酯组合物。 粘附的涂层,具有优异的阻挡性能和低至10(-12)的电流密度,并证明了10(10)欧姆(2)的阻抗。 电化学测量(EIS和偏振测试),SEM-EDX和微拉曼分析表明缺陷的CE缺陷和缺陷中的较高浓度,支持自愈合过程的激活。

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  • 来源
    《RSC Advances》 |2016年第46期|共10页
  • 作者单位

    CSIC Inst Ceram &

    Vidrio Kelsen 5 Madrid 28049 Spain;

    CSIC Inst Ceram &

    Vidrio Kelsen 5 Madrid 28049 Spain;

    CSIC Inst Ceram &

    Vidrio Kelsen 5 Madrid 28049 Spain;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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