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教授提出的一项为期4个月的访问奖学金计划，目的是访问英国，开展利用核磁共振技术研究铝和镁的腐蚀和钝化的探索性工作。她将与Mark Smith教授(核磁共振)一起在华威大学物理系工作，但也会经常访问仅20英里外的伯明翰，与Alison Davenport博士(腐蚀)和Melanie Britton博士(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先者，尤其是在聚合物电解质、新型离子电解质和电化学腐蚀工艺方面。本项目将重点利用核磁共振技术来研究镁和铝基轻合金的腐蚀和防护。保护性钝化膜的化学成分将用多核核磁共振技术进行测定，以研究其形成机理和阻止腐蚀反应的方式。当发生腐蚀时，腐蚀坑会渗入金属中。核磁共振将被用来确定这些坑内浓缩的金属氯化物溶液的化学成分，以及控制坑稳定性的水甚至离子的传输。最后，将探索利用磁共振成像来观察人工坑发展的可能性。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，并可能为研究点蚀过程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，这项工作还将加深对这些工艺的基本了解，这些工艺将对航空航天和汽车行业具有实用价值，在航空航天和汽车行业，镁和铝等轻合金正越来越多地被用于提高燃料效率，并且正在努力延长结构(例如老化的飞机)的寿命。在此类应用中，腐蚀及其防护对车辆的安全至关重要。该项目将汇集一组具有高度互补性的专业知识的研究人员来开发核磁共振技术，包括光谱、弛豫、扩散和成像实验，以带来一种使用磁共振技术来探测轻金属合金中的腐蚀和钝化过程的新方法。在奖学金期间，我们的意图是将Forsyth的世界领先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。这将是启动这一新项目的密集活动。此外，这将是Forsyth教授在逗留期间会见一系列其他英国团体并进行一系列座谈的绝佳机会。

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.