ABSTRACT To study the influence of the microstructure of cast iron on the adhesion of an epoxy coating, ferritic, pearlitic and austempered samples were prepared in as-received, polished and oxidised states. A pull-off test (dry adhesion) was performed before immersing in water while the cross-cut test was made after 24 days of exposition in distilled water (wet adhesion). X-rays were combined with optical microscopy (LOM) and scanning electron microscopy (SEM) for surface analysis. The adhesion of the epoxy coating on the cast iron surface firstly depends on the roughness of the surface; polished samples showed high adherence by comparison with as-received samples. On the oxidised samples, the surface oxide significantly improves the adhesion of the coating in both dry and wet states for all three sample microstructure. The presence of carbide in the structure was observed to decrease adherence.

中文翻译：

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铸铁显微组织对环氧树脂保护层附着力的影响

摘要 为了研究铸铁的微观结构对环氧涂层附着力的影响，制备了处于原样、抛光和氧化状态的铁素体、珠光体和等温淬火样品。在浸入水中之前进行拉拔试验（干附着力），而在蒸馏水中暴露 24 天后进行横切试验（湿附着力）。X 射线与光学显微镜 (LOM) 和扫描电子显微镜 (SEM) 结合进行表面分析。环氧涂层在铸铁表面的附着力首先取决于表面的粗糙度；与原样相比，抛光后的样品显示出高附着力。在氧化样品上，对于所有三个样品微观结构，表面氧化物显着提高了涂层在干态和湿态下的附着力。