NSERC/UNENE Industrial Research Chair in Corrosion control and materials performance in nuclear power systems

核电站使用的材料必须能承受极端的温度、压力、辐射和 化学环境。这个IRC程序解决了金属合金的降解机制， 特别强调应力和腐蚀的联合作用，这可能导致应力腐蚀开裂 （SCC）。 核电腐蚀与应力腐蚀开裂的预防与管理取得了长足的进步 系统，但仍有许多需要了解。特别是，我们总是担心 延迟开始降解。这就需要了解腐蚀的微观细节 事件和裂缝开始了。我们研究的大多数材料都是合金，每一种合金元素都能影响 腐蚀和SCC。一个热门问题是合金800的性能，合金800是一种不锈钢，但 镍和铬的含量高于普通厨房水槽品种。实验室熔化的小纽扣 合金将与商业合金一起使用，以探索腐蚀行为对 合金成分要研究的两种水杂质是硫和铅，它们具有不同的， 对腐蚀的类似影响。IRC计划还将解决其他一些腐蚀问题， 随着行业需求的变化， 显微镜和小规模化学分析的进步极大地促进了我们对SCC的理解。 麦克马斯特大学的电子显微镜设备一直是一个宝贵的资源， 将继续但是现在多伦多大学已经获得了一个最先进的设施，OCCAM， 显微镜和纳米级的化学分析。这一资源将在更新后的IRC中发挥关键作用 方案

The materials used in nuclear power plants must withstand extremes of temperature, stress, radiation and chemical environment. This IRC programme addresses the degradation mechanisms of metallic alloys, with particular emphasis on the combined action of stress and corrosion, which can lead to stress corrosion cracking (SCC). Huge strides have been made in the prevention and management of corrosion and SCC in nuclear power systems, but much remains to be understood. In particular, we are always concerned about the possibility of delayed onset of degradation. This necessitates an understanding of the microscopic details of how corrosion events and cracks get started. Most of the materials we study are alloys, and every alloying element can affect corrosion and SCC. A topical issue is the performance of Alloy 800, which is a kind of stainless steel, but with higher content of nickel and chromium than the ordinary kitchen-sink variety. Small buttons of lab-melted alloys will be used alongside commercial alloys to explore the detailed dependence of corrosion behaviour on alloy composition. Two of the water impurities to be studied are sulfur and lead, which have distinct but analogous effects on corrosion. The IRC programme will also address a number of other corrosion issues, with some flexibility as industry needs evolve. Advances in microscopy and small-scale chemical analysis have greatly advanced our understanding of SCC. The electron microscopy facility at McMaster University has been an invaluable resource, and collaboration will continue. But now the University of Toronto has acquired a state-of-the-art facility, OCCAM, for microscopy and chemical analysis at the nanoscale. This resource will play a key role in the renewed IRC programme