Characterizing Corrosion Inhibition Performance of Advanced Coating Technologies using Micro Electrochemical Methods

涂料是我们日常生活中不可或缺的一部分，但它们的平均使用寿命不超过一年。在金属涂层和涂层金属中，腐蚀是不可避免的。通过通过了解腐蚀机理和行为而设计的腐蚀控制策略，可以大大减少与这种化学降解相关的成本和安全问题。涂层的腐蚀通常始于局部区域，原因是在制造和重复使用过程中形成的缺陷，或者由于材料固有的微观结构。虽然宏观尺度方法提供了有关金属/涂层界面表面平均性质的重要信息，但它们不能提供在纳米和微米尺度上监测腐蚀起始所需的空间信息。这些信息对于了解缺陷如何影响腐蚀机理以及如何最大限度地减少局部侵蚀以改进涂层技术以实现更持久的保护和安全是必要的。我的研究计划的长期目标是改进、实施和标准化用于微观腐蚀分析的扫描电化学探针法(SEPM)，并使用这些工具来设计、表征和优化缓蚀策略。通过使用SEPM，这项研究计划将提供有关涂层制造参数和选择如何影响金属涂层和聚合物涂层金属的腐蚀行为的新信息，这些信息将用于改进和修改涂层制造程序，以减少化学降解。我将探索如何改进SEPM用于微尺度腐蚀测量，包括更准确地提取腐蚀参数和更好的空间分辨率。将使用互补的表面表征方法来将微结构特征的化学成分与其电化学反应活性联系起来。在接下来的五年里，我将重点研究两种先进涂层系统的腐蚀机理和性能，这两种涂层系统是使用工业上突出的新兴技术生产的：热喷涂和聚合物刷子。这两种涂层系统作为工业防腐策略具有巨大的潜力，可以结合在一起解决目前聚合物与热喷涂涂层的可持续附着力问题。这两种涂层技术的可裁剪性和广泛的涂层材料有助于制造几乎任何适用于任何特定应用的涂层材料。涂层表面的局部腐蚀是危险的，因为在涂层穿孔之前很难检测到它，但会导致材料的机械完整性严重退化。该计划将确保使用涂层金属基础设施的加拿大人的安全，帮助保护环境免受金属污染，并致力于在加拿大土壤上建造下一代更持久的防腐涂层。

Coatings are an integral part of our everyday life, yet their average service lifetime does not exceed one year. In the cases of metallic coatings and coated metals, corrosion is inevitable. The cost and safety concerns associated with such chemical degradation can be drastically reduced through corrosion control strategies that are designed by understanding corrosion mechanisms and behaviour. Corrosion of coatings often initiates at localized regions due to defects formed during fabrication and repetitive use, or due to the material's inherent microstructure. Although macroscale methods provide important information about the surface-averaged properties of the metal/coating interface, they cannot provide the spatial information needed to monitor corrosion initiation at the nano- and microscale. Such information is necessary to understand how defects impact corrosion mechanisms and how to minimize localized attack to improve coating technologies for longer lasting protection and safety. The long-term goals of my research program are to refine, implement, and standardize scanning electrochemical probe methods (SEPM) for micro corrosion analysis and to use these tools to design, characterize, and optimize corrosion-inhibition strategies. By utilizing SEPM, this research program will provide new information about how coating fabrication parameters and choices affect corrosion behaviours of metallic coatings and polymer-coated metals, which will be used to improve and modify coating fabrication procedures to decrease chemical degradation. I will explore how to improve SEPM for microscale corrosion measurements, including more accurate extraction of corrosion parameters and better spatial resolution capabilities. Complementary surface characterization methods will be used to relate the chemical composition of microstructural features to their electrochemical reactivity. Over the next five years, I will focus on characterizing the corrosion mechanisms and behaviours of two advanced coating systems produced using industrially prominent and emerging technologies: thermal spraying and polymer brushes. Both coating systems have tremendous potential as industrial corrosion protection strategies, and can be coupled together to solve the current issue of sustainable adhesion of polymers to thermal spray coatings. The tailorability of the two coating technologies and the wide range of coating materials facilitate the fabrication of virtually any suitable coating material for any specific application. Localized corrosion of coated surfaces is dangerous because it is difficult to detect before coating perforation occurs, but results in severe degradation of the material's mechanical integrity. This program will ensure the safety of Canadians using coated metallic infrastructure, aid in the protection of the environment from metal contamination, and work towards building the next generation of longer-lasting corrosion resistant coatings on Canadian soil.