Understanding Corrosion and Passivation Processes in Light Alloys using Multinuclear NMR Techniques: A Visiting Fellowship for Prof. M. Forsyth

这是莫纳什大学的Maria Forsyth教授访问英国进行为期4个月的访问研究的提议，研究使用核磁共振（NMR）来研究铝和镁的腐蚀和钝化。她将在华威大学物理系与马克·史密斯教授（核磁共振）一起工作，但也会经常去20英里外的伯明翰与艾莉森·达文波特博士（腐蚀）和梅勒妮·布里顿博士（核磁共振成像）一起工作。福赛斯无疑是材料工程领域公认的世界领导者，特别是在聚合物电解质、新型离子电解质和电化学腐蚀过程方面。该项目将侧重于利用核磁共振技术研究镁和铝轻合金的腐蚀和防护。用多核磁共振技术测定保护钝化膜的化学性质，以研究其形成机制和阻断腐蚀反应的方式。当腐蚀发生时，腐蚀坑会渗入金属。核磁共振将用于确定这些坑内浓缩的金属氯化物溶液的化学性质，以及控制坑稳定性的水甚至离子的输送。最后，探讨利用磁共振成像技术观察人工坑发育的可能性。非常初步的测量表明，这种具有挑战性的实验方法是可行的，并且可以为点蚀过程的研究开辟一种全新的方法。除了探索金属腐蚀和钝化的新实验方法外，这项工作还将对这些过程有一个基本的理解，这将对航空航天和汽车工业具有实用价值，在这些工业中，镁和铝等轻合金正越来越多地用于提高燃油效率，并且正在努力延长结构的寿命（例如老化的飞机）。在这些应用中，腐蚀及其预防对车辆的安全至关重要。该项目将汇集一组具有高度互补专业知识的研究人员，开发核磁共振技术，包括光谱学，弛豫，扩散和成像实验，为使用磁共振技术探测轻金属合金的腐蚀和钝化过程带来一种新的方法。在奖学金期间，目的是将福赛思世界领先的材料专业知识与英国团队的核磁共振和材料专业知识结合起来，形成英国和澳大利亚之间的长期合作，这将为该领域做出独特的贡献。这将是一个密集的活动爆发，以启动这个新项目。此外，这将是福赛斯教授在她逗留期间会见其他英国团体并举行一系列座谈会的绝佳机会。

This is a proposal for a 4 month visiting fellowship for Prof. Maria Forsyth of Monash University to visit the UK to carry out exploratory work on the use of nuclear magnetic resonance (NMR) to investigate the corrosion and passivation of aluminium and magnesium. She will be based in the Department of Physics at Warwick with Prof. Mark Smith (NMR), but also make frequent visits to Birmingham only 20 miles away to work with Dr Alison Davenport (corrosion) and Dr Melanie Britton (magnetic resonance imaging, MRI). Forsyth is without doubt an acknowledged world-leader in materials engineering, particularly related to polymer electrolytes, novel ionic electrolytes and electrochemical corrosion processes. This project will focus on the use of NMR techniques to study the corrosion and protection of light alloys based on magnesium and aluminium. The chemistry of protective passivating films will be determined with multinuclear NMR techniques to investigate the mechanism of formation and the way in which they block corrosion reactions. When corrosion does take place, corrosion pits penetrate into the metal. NMR will be used to determine the chemistry of the concentrated metal chloride solutions within these pits, and the transport of water and even ions that control pit stability. Finally, the possibility of using magnetic resonance imaging to observe the development of artificial pits will be explored. Very preliminary measurements have suggested that this challenging experimental approach is feasible, and could open up an entirely new approach for the study of pitting processes. In addition to exploring new experimental approaches to corrosion and passivation of metals, this work will develop a fundamental understanding of these processes that will be of practical value to the aerospace and automotive industries, where light alloys such as magnesium and aluminium are being increasingly used to improve fuel efficiency, and efforts are underway to extend the lifetime of structures (for example ageing aircraft). In such applications, corrosion and its prevention are critical to the safety of vehicles. This project will bring together a group of researchers with highly complementary expertise to develop NMR techniques, to include spectroscopy, relaxation, diffusion and imaging experiments to bring a novel approach to using magnetic resonance techniques to probe corrosion and passivation processes in light metal alloys. During the fellowship, the intention is to bring together the world-leading material's expertise of Forsyth with the NMR and materials expertise of the UK team to form a long-term collaboration between the UK and Australia that will make a unique contribution to this field. This will be an intensive burst of activity to kick start this new project. In addition, this will be an excellent opportunity for Prof. Forsyth to meet a range of other UK groups during her stay and to give a series of colloquia.