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Determination of epoxy coating wet-adhesive strength using a standardized ASTM/ISO scratch test

机译：使用标准的ASTM / ISO划痕测试确定环氧涂料的湿粘合强度

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摘要

A new approach for evaluating the wet-adhesive strength of epoxy-based coatings was carried out based on a recently standardized ASTM/ISO scratch test. A linearly increasing scratch normal load was applied during scratch to induce progressively increased delamination stress at the coating and steel substrate interface. Thus, the applied critical load to cause coating debonding can be experimentally determined. To find out the corresponding stress magnitude to incur coating debonding, finite element methods (FEM) modeling was conducted to analyze the stress fields around the scratch tip during scratching. The wet-adhesive strength is then quantitatively determined. Based on the above methodology, investigation on a set of model coating systems suggests that the critical load for coating delamination is significantly influenced by water exposure time, coating thickness, and substrate surface roughness. By combining the standardized scratch tests and FEM modeling, the proposed approach is found to be effective for quantitative assessment of epoxy coating wet-adhesive strength and for the development of high performance protective coatings for various industrial applications.
机译：根据最近标准化的ASTM / ISO划痕测试，采用了一种新的方法来评估环氧涂料的湿粘合强度。在刮擦过程中施加了线性增加的刮擦法向载荷，以在涂层和钢基材界面处引起逐渐增加的分层应力。因此，可以通过实验确定导致涂层剥离的施加的临界载荷。为了找出导致涂层脱粘的相应应力大小，进行了有限元方法（FEM）建模，以分析刮擦过程中刮擦尖端周围的应力场。然后定量测定湿粘合强度。基于上述方法，对一组模型涂层系统的研究表明，涂层分层的临界载荷受水暴露时间，涂层厚度和基材表面粗糙度的影响很大。通过将标准化的划痕测试与FEM建模相结合，发现所提出的方法对于定量评估环氧涂料的湿粘合强度和开发适用于各种工业应用的高性能保护涂料是有效的。

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  • 来源
    《JCT research》 |2011年第2期|p.255-263|共9页
  • 作者

    Han Jiang; Robert Browning; Peng Liu; T. A. Chang; Hung-Jue Sue;

  • 作者单位

    Department of Mechanical Engineering, Polymer Technology Center, Texas A&M University, College Station, TX 77843-3123, USA;

    Department of Mechanical Engineering, Polymer Technology Center, Texas A&M University, College Station, TX 77843-3123, USA;

    Department of Mechanical Engineering, Polymer Technology Center, Texas A&M University, College Station, TX 77843-3123, USA;

    PolyLab LLC, Houston, TX 77042, USA;

    Department of Mechanical Engineering, Polymer Technology Center, Texas A&M University, College Station, TX 77843-3123, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    epoxy coating; wet-adhesive strength; debonding; scratch; finite element modeling;

    机译：环氧涂料;湿粘合强度;脱胶刮;有限元建模;

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