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、应力、辐射和化学环境。这个IRC程序解决了金属合金的退化机制，特别强调应力和腐蚀的共同作用，这可能导致应力腐蚀开裂（SCC）。**在核电系统的腐蚀和SCC的预防和管理方面已经取得了巨大的进步，但仍有许多有待了解。特别是，我们一直关注退化延迟发生的可能性。这就需要了解腐蚀事件和裂缝是如何开始的微观细节。我们研究的大多数材料都是合金，每一种合金元素都会影响**腐蚀和SCC。一个热门话题是Alloy 800的性能，它是不锈钢的一种，但它的镍和铬含量比普通的厨房水槽品种高。实验室熔化合金的小按钮将与商业合金一起使用，以探索腐蚀行为对合金成分的详细依赖。要研究的两种水中杂质是硫和铅，它们对腐蚀的影响不同，但类似。IRC计划还将解决一些其他腐蚀问题，并根据行业需求的发展具有一定的灵活性。**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宝贵的资源，合作将继续**。但是现在多伦多大学已经获得了一个最先进的设备，OCCAM，用于纳米级的显微镜和化学分析。这一资源将在更新后的IRC**方案中发挥关键作用

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