Radiation Assisted Materials Performance

辐射辅助材料性能

• 批准号: RGPIN-2018-04459
• 负责人: Wren, Jungsook
• 金额: $ 5.76万
• 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: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=713033
• 关键词: Radiation; Assisted; Materials; Performance

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.

拟议的研究旨在了解液化界面反应系统的动态行为的基本过程，液化界面反应系统的腐蚀是最复杂的。腐蚀是一种电化学过程，不仅涉及电子的转移，而且还涉及金属阳离子。金属阳离子的转移可能涉及溶解，水解和氧化物的形成。随着腐蚀的发展，金属氧化反应的性质和速率可能会发生变化，溶液和氧化物相的电化学和物理特性可能会发展。这些变化可以建立自催化周期和全身反馈。尚无对控制腐蚀非线性动态的基本过程的全面理论或机械理解。 在强烈的全身反馈可以发展的条件下，可以预测腐蚀过程演变的模型的开发非常困难。为此，能够将腐蚀所涉及的基本过程解脱出来至关重要。拟议的研究将包括实验性和模型开发研究，以建立基本过程的驱动力和动态，并确定这些过程之间的反馈方式。这项研究将使能够建立一个腐蚀动态相图，该腐蚀动态相图包含稳态，双态状态和振荡区的类型和性质，作为溶液特性的函数。它还将实现可以预测稳定性变化或周期性或混乱行为的出现的数学模型，这是解决方案条件的函数。这些初始模型将用作开发实用腐蚀模型的组成部分。 拟议的研究有可能从根本上改变我们对界面电荷转移过程（例如腐蚀）的建模方式，如腐蚀，估计全球每年耗资2.5万亿美元。腐蚀预测中的两个主要挑战是在可能不可能进行直接测量的实际服务环境中建模腐蚀，并使用以可量化方式加速其加速的技术来模拟长时间的腐蚀。考虑到腐蚀过程中从未考虑过的非线性动态过程，这项研究解决了这两个问题。这项研究将建立一个用于建模腐蚀的新范式，并且总体上将建立界面系统，这将为社会带来广泛的好处。