Radiation Assisted Materials Performance

拟议的研究旨在了解液-固界面反应系统，其中腐蚀是最复杂的动态行为的基本过程。腐蚀是一种电化学过程，不仅涉及电子的转移，而且涉及金属阳离子的转移。金属阳离子的转移可涉及溶解、水解和氧化物形成。随着腐蚀的进行，金属氧化反应的性质和速率可能会改变，并且溶液和氧化物相的电化学和物理性质可能会演变。这些变化可以建立自动催化循环和系统反馈。对于控制腐蚀的非线性动力学的基本过程，还没有任何全面的理论或机械理解。开发模型，可以预测的条件下，强烈的系统反馈可以发展的腐蚀过程的演变是非常困难的。要做到这一点，关键是要能够解耦腐蚀中涉及的基本过程。拟议的研究将包括实验和模型开发研究，以建立基本过程的驱动力和动力学，并确定这些过程之间的反馈如何发展。该研究将能够建立包含作为溶液性质的函数的稳定状态、非稳定状态和振荡区域的类型和性质的腐蚀动态相图。它还将使数学模型的发展，可以预测稳定性的变化，或出现周期性或混乱的行为，作为一个函数的解决方案的条件。这些初始模型将被用作开发实际腐蚀模型的一个组成部分。拟议的研究有可能从根本上改变我们对腐蚀等界面电荷转移过程的建模方式，据估计，全球每年的成本为2.5万亿美元。腐蚀预测中现存的两个主要挑战是在实际使用环境中对腐蚀进行建模，其中直接测量可能是不可能的，以及使用以可量化的方式加速腐蚀的技术来模拟长时间的腐蚀。这项研究解决了这两个问题，考虑到非线性动态过程，以前从未被认为是在腐蚀过程中。这项研究将建立一个新的模式，为建模腐蚀，界面系统一般，将有广泛的社会效益。

The proposed research aims at understanding the fundamental processes governing the dynamic behaviour of liquid-solid interfacial reaction systems, of which corrosion is the most complex. Corrosion is an electrochemical process involving transfer of not only electrons but also metal cations. The transfer of a metal cation can involve dissolution, hydrolysis and oxide formation. As corrosion progresses the nature and the rates of the metal oxidation reactions may change, and the electrochemical and physical properties of the solution and oxide phases may evolve. These changes can establish autocatalytic cycles and systemic feedback. There is not yet any comprehensive theory or mechanistic understanding of the fundamental processes that govern the nonlinear dynamics of corrosion.***Development of models that can predict the evolution of corrosion processes under conditions where strong systemic feedback can develop is very difficult. To do so, it is critical to be able to decouple the elementary processes involved in corrosion. The proposed research will include both experimental and model development studies to establish the driving forces and dynamics for the elementary processes and to determine how feedback among these processes may develop. The research will enable establishment of a corrosion dynamic phase diagram containing the type and nature of steady states, bistable states and oscillation regions as a function of solution properties. It will also enable development of mathematical models that can predict changes in stability, or the appearance of periodic or chaotic behaviour, as a function of solution conditions. These initial models will be used as a component in the development of practical corrosion models.***The proposed research has the potential to radically transform how we model interfacial charge transfer processes such as corrosion, which is estimated to cost US$2.5 trillion per year globally. Two major extant challenges in corrosion prediction are modelling corrosion in actual service environments where direct measurement may be impossible, and simulating long periods of corrosion using techniques that accelerate it in a quantifiable way. This research addresses both of these issues, taking into account non-linear dynamic processes that have never before been considered in corrosion processes. This research will establish a new paradigm for modelling corrosion, and interfacial systems in general, that will have wide-reaching benefits for society.