The effect of surface patterning on corrosion of metals

表面图案对金属腐蚀的影响

• 批准号: RGPIN-2018-04102
• 负责人: Stoilov, Vesselin
• 金额: $ 2.04万
• 依托单位: University of Windsor
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=666014
• 关键词: effect; surface; patterning; corrosion; metals

Understanding the complementary roles of surface energy and surface topology in natural nonwetting surfaces has led to the development of many biomimetic hydrophobic surfaces. Two distinct phenomena explain the nature of the observed hydrophobicity. On one hand, the roughness of such surfaces is significantly increased, which increases the overall surface area of the solid. On the other hand, such “roughness” allows for the formation of metastable air pockets trapped below the liquid, which results in partially suspended liquid on heterogenous air-solid interface. Based on the idea that such hydrophobic (low or non-wettable) surfaces reduce the actual contact area between the solid surface and the electrolyte(corrosion agent), a possible approach to combat corrosion was deducted. The essence of such approach is to achieve stable heterogeneous wetting at the solid-liquid interface. Due to the surface nature of the corrosion phenomenon the heterogeneous wetting and the resulting reduction in contact surface should lead to a significant reduction in the overall corrosion rate. The challenge in forming heterogeneous interfaces on hydrophilic materials lies in designing surface topographies that will lead to stable air/vapor entrapment.***The main goal of the proposed research is to develop artificial surface texturing to control corrosion on metallic surfaces. The primary focus will be on developing structured surfaces containing structures on a scale of 0.1 to 100 microns. The suggested surface morphologies will be created by using laser ablation and Deep Reactive Ion Etching (DRIE). The proposed research will attempt to provide in-depth study of the surface texturing phenomena. Thus, the research promises a major advance on prior art in corrosion protection by increasing the understanding and demonstrating the feasibility of adopting surface texturing in wide range of applications.*****

了解表面能量和表面拓扑在自然无障碍表​​面的完整作用，导致了许多仿生疏水表面的发展。两个不同的现象解释了观察到的疏水性的性质。一方面，这种表面的粗糙度显着增加，这增加了固体的整体表面积。另一方面，这种“粗糙度”允许形成被困在液体下方的亚稳态空气口袋，从而在异源空气固体界面上部分悬浮液体。基于这样的想法，即这种疏水性（低或不润接）表面减少了固体表面和电解质（腐蚀剂）之间的实际接触面积，因此扣除了一种可能的对抗腐蚀的方法。这种方法的本质是在固液界面上实现稳定的异质润湿。由于腐蚀现象的表面性质，异质润湿和接触表面的减少应导致总体腐蚀速率显着降低。在亲水材料上形成异质界面的挑战在于设计表面地形，这将导致稳定的空气/蒸气夹带。主要的重点将是开发结构化表面，该表面含有0.1至100微米的结构。建议的表面形态将通过使用激光消融和深反应性离子蚀刻（DRIE）创建。拟议的研究将尝试对表面纹理现象进行深入研究。这项研究有望通过提高理解并证明在广泛应用中采用表面纹理的可行性，对先前的腐蚀保护进行了重大进步。******