U.S.-Korea Cooperative Research on the Effects of Hydrogen Upon the Passivating Films on Iron and Nickel

这一建议要求资金允许理查德博士。Oriani，教授 明尼苏达大学腐蚀研究中心主任， 继续与材料科学系的Su-Il Pyun博士和 韩国科学技术高等研究院工程学 （KAIST），为期24个月，合作研究方案 氢对铁和镍钝化膜的影响。 研究将集中在三个具体任务上，即（1） 钝化氧化膜中氢迁移率的测定（2） 氢对离子和电子性质的影响， 钝化膜;（3）氢对点蚀的影响 钝化膜的特性。 铁和镍物体的表面通常被保护， 表面钝化氧化膜层腐蚀。 本 项目，合作者将研究如何在钝化氢 金属上的氧化物层的行为以及它如何改变它们的性质。 氢穿过钝化层的传输似乎是 在酸性介质中发生自由腐蚀时， 在金属和水相中均发现氢。 这 该项目将主要涉及氢的动力学和机制 酸介质中自由腐蚀和应力腐蚀裂纹的迁移 媒体，但这项研究将有助于了解压力 金属的腐蚀开裂和腐蚀疲劳。 因此，研究 可能在许多环境中有重要的应用，包括腐蚀 用于裂变和聚变核反应堆的热交换器。 美国 韩国的合作者都是备受尊敬的科学家， 成功合作的记录。 该项目与 美国的目标-韩国合作科学计划，旨在 提高美国和韩国科学家之间的合作水平 和工程师通过交流科学信息，想法， 技能和技术，并通过在共同问题上的合作， 效益 该项目将增加一个国际合作层面 Oriani博士的研究在国家科学基金会资助号DMR-8714547。

This proposal requests funds to permit Dr. Richard A. Oriani, Professor and Director, Corrosion Research Center, University of Minnesota, to pursue with Dr. Su-Il Pyun, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), for a period of 24 months, a program of cooperative research on the effects of hydrogen on passivating films on iron and nickel. The research will focus on three specific tasks, namely, (1) the determination of mobility of hydrogen in passivating oxide films, (2) the effects of hydrogen on the ionic and electronic properties of passivating films, and (3) the effect of hydrogen on the pitting characteristics of passivating films. The surface of iron and nickel objects often is protected from corrosion by surface layers of passivating oxide films. In the present project, the collaborators will study how hydrogen within passivating oxide layers on metals behaves and how it modifies their properties. The transport of hydrogen across a passivating layer appears to be involved whenever free corrosion takes place in an acid medium because hydrogen is found both within the metal and in the aqueous phase. This project will deal primarily with the kinetics and mechanism of hydrogen transport in free corrosion and stress corrosion cracking in acid media, but the research will contribute to an understanding of stress corrosion cracking and corrosion fatigue of metals. Thus, the research may have important applications in many settings, including corrosion in heat exchangers for fission and fusion nuclear reactors. The U.S. and Korean collaborators are highly respected scientists who have a record of successful collaboration. This project is relevant to the objectives of the U.S.-Korea Cooperative Science Program which seeks to increase the level of cooperation between U.S. and Korean scientists and engineers through the exchange of scientific information, ideas, skills, and techniques and through collaboration on problems of mutual benefit. This project will add an international cooperative dimension to Dr. Oriani's research under NSF Grant No. DMR-8714547.