ABSTRACT Surface treatment technologies are constantly evolving. Increasingly, surface functionalisation is of major concern to lighten structures, improve product performance and reduce costs. To fulfil its decorative and protective functions, it is essential that a coating adheres properly to its support. During the last few decades, many new deposition techniques have been developed and more and more tribological and corrosion resistant coatings have been made available. In this context, the present research has focused on two pneumatically sprayed epoxy/polyamide and inorganic silicate coatings which are deposited on the mild steel substrate. First, the main interest in this study is devoted to the analysis of the coating/substrate adhesion strength by using the squaring and pull-off tests. Second, the study has also focused on the analysis of friction and wear behaviours for the two systems of paint coatings under consideration by using a linear reciprocating tribometer under dry sliding condition. Experimental findings have shown that after appropriate surface preparation and degree of cleaning according to the standard ISO 8501-1, selected paint systems composed of organic or inorganic coatings effectively improve the service life of coated steel. Meanwhile, under the same sliding conditions, the wear results have revealed that the organic coatings have a higher anti-wear ability compared to the inorganic coatings. Thus, both organic and inorganic coatings play an important role in protecting the substrate against severe industrial environment. From the squaring and pull-off analyses, it has been deduced that scratch and pull-off behaviours of both coatings have been severely affected by the surface preparation, the number of protective layers and the thickness of coatings. In fact, the best adhesion, friction and wear properties are obtained for the paint system containing organic coatings where the third body is formed on the entire sliding strip in the test.

中文翻译：

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沉积在低碳钢基材上的有机和无机涂层的机械和摩擦学行为的实验研究

摘要 表面处理技术在不断发展。表面功能化越来越成为减轻结构、提高产品性能和降低成本的主要关注点。为了实现其装饰和保护功能，涂层必须正确粘附在其支撑物上。在过去的几十年中，开发了许多新的沉积技术，并且提供了越来越多的摩擦和耐腐蚀涂层。在这方面，目前的研究集中在沉积在低碳钢基材上的两种气动喷涂环氧树脂/聚酰胺和无机硅酸盐涂层。首先，这项研究的主要兴趣在于通过使用平方和拉脱测试来分析涂层/基材的附着强度。第二，该研究还侧重于通过在干滑动条件下使用线性往复摩擦计来分析所考虑的两种油漆涂层系统的摩擦和磨损行为。实验结果表明，根据 ISO 8501-1 标准进行适当的表面处理和清洁程度后，选择的由有机或无机涂层组成的油漆体系可有效提高涂层钢的使用寿命。同时，在相同的滑动条件下，磨损结果表明有机涂层与无机涂层相比具有更高的抗磨损能力。因此，有机和无机涂层在保护基材免受恶劣工业环境影响方面都发挥着重要作用。从平方和拉离分析，据推断，两种涂层的划伤和剥离行为都受到表面处理、保护层数量和涂层厚度的严重影响。事实上，含有有机涂层的油漆系统获得了最佳的附着力、摩擦和磨损性能，其中在测试中在整个滑动条上形成了第三体。