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首页> 外文会议>Coatings for corrosion protection >Smart-Release Inhibition of Corrosion-Driven Organic Coating Delamination on Galvanized Steel Surfaces
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Smart-Release Inhibition of Corrosion-Driven Organic Coating Delamination on Galvanized Steel Surfaces

机译：镀锌钢表面上腐蚀驱动的有机涂层分层的智能释放抑制

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摘要

In-coating cation and anion-exchange pigments are studied with respect to their ability to inhibit corrosion-driven organic coating disbondment on the zinc surface of hot-dip galvanized (HDG) steel. The efficiency of inorganic smart-release cation-exchangers, including bentonite and zeolite based pigments containing stored Zn(ⅱ) inhibitor are compared with an organic cation-exchange cross-linked polystyrene based system. In-situ scanning Kelvin probe experiments carried out on HDG samples coated pigment-containing model polymer organic films showed that only the bentonite system was capable of halting delamination over a 24 h holding period, despite having a cation exchange capacity of only one third of the other exchangers. The reasons for this are discussed in terms of the kinetics of underfilm ion-exchange process. A preliminary investigation of anion-exchange hydrotalcite-based pigments is also described. The inhibition efficiency is shown to be highly anion specific, with chromate and phosphate exchanged pigments providing the best protection against organic coating cathodic disbondment.
机译：就涂层内阳离子和阴离子交换颜料抑制热浸镀锌（HDG）钢锌表面上腐蚀驱动的有机涂层剥离的能力进行了研究。将无机膨润土阳离子交换剂（包括膨润土和沸石基颜料，含锌（ⅱ）抑制剂）与有机阳离子交换交联聚苯乙烯基体系的效率进行了比较。在HDG样品上进行的原位扫描开尔文（Kelvin）探针实验表明，涂覆的含颜料的模型聚合物有机薄膜的膨润土体系在24 h的保持时间内能够停止分层，尽管其阳离子交换能力仅为其的三分之一。其他交换器。根据膜下离子交换过程的动力学讨论了其原因。还描述了阴离子交换水滑石基颜料的初步研究。已显示出抑制效率是高度阴离子特异性的，铬酸盐和磷酸盐交换的颜料可提供最佳保护，防止有机涂层阴极剥离。

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  • 来源
    《Coatings for corrosion protection》|2011年|93-103|共11页
  • 会议地点 Boston MA(US)
  • 作者

    G. Williams; S. Geary; M. Loveridge; H.N. McMurray;

  • 作者单位

    Materials Research Centre, College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom;

    Materials Research Centre, College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom;

    Materials Research Centre, College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom;

    Materials Research Centre, College of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom;

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