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

使用微电化学方法表征先进涂层技术的缓蚀性能

• 批准号: RGPIN-2022-04696
• 负责人: Gateman, Samantha
• 金额: $ 1.82万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=747869
• 关键词: Characterizing; Corrosion; Inhibition; Performance; Advanced

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.

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的情况下，腐蚀是不可避免的。通过了解腐蚀机制和行为而设计的腐蚀控制策略，可以大大减少与此类化学降解相关的成本和安全问题。由于制造和重复使用过程中形成的缺陷，或由于材料固有的微观结构，涂层的腐蚀通常在局部区域开始。虽然宏观尺度的方法提供了重要的信息，金属/涂层界面的表面平均性能，他们不能提供所需的空间信息，以监测腐蚀开始在纳米和微米尺度。这些信息对于了解缺陷如何影响腐蚀机制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性是必要的。 我的研究计划的长期目标是完善，实施和标准化扫描电化学探针方法（SEPM）进行微腐蚀分析，并使用这些工具来设计，表征和优化腐蚀抑制策略。通过利用SEPM，该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。我将探讨如何改进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能力。互补的表面表征方法将被用来将微结构特征的化学组成与其电化学反应性联系起来。在接下来的五年里，我将专注于描述两种先进涂层系统的腐蚀机制和行为，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。这两种涂层系统作为工业腐蚀防护策略具有巨大的潜力，并且可以结合在一起以解决当前聚合物与热喷涂涂层的可持续粘附问题。这两种涂层技术的可定制性和广泛的涂层材料有助于为任何特定应用制造几乎任何合适的涂层材料。 涂层表面的局部腐蚀是危险的，因为在涂层穿孔发生之前很难检测到，但会导致材料机械完整性的严重退化。该计划将确保加拿大人使用涂层金属基础设施的安全，帮助保护环境免受金属污染，并致力于在加拿大土地上建造下一代更持久的耐腐蚀涂层。