U.S.-Korea Cooperative Research on Passivating Film Forma- tion on Aluminum and on Tungsten Studied by Beam Deflection and Abrading Electrode Techniques

该奖项将资助明尼苏达大学双子城腐蚀研究中心的Richard a . Oriani博士与韩国科学技术院材料科学与工程系的Su-Il Pyun博士进行为期24个月的合作研究项目，研究铝和钨钝化氧化膜的性质和形成机制。两个重要的测量，即(1)钝化动力学和(2)薄膜形成过程中产生的机械应力将在不同的电解质成分和不同的电位时间条件下进行。在金属腐蚀过程中，金属表面产生的氧化膜大大降低了随后腐蚀的速度。在铝和钨的情况下，这种耐腐蚀性是由于形成了一层薄薄的钝化氧化膜。众所周知，薄膜的形成动力学和特性随电解质溶液的化学性质和薄膜形成时的电势而变化。这项研究的结果可能会更好地理解腐蚀和钝化过程，以防止进一步的腐蚀。合作者是该提案领域中备受尊敬的研究人员。该项目与美韩合作科学项目的目标相关，该项目旨在通过科学信息、思想、技能和技术的交流以及在互利问题上的合作，提高美韩科学家和工程师之间的合作水平。韩国参与该项目得到了韩国科学工程财团（KOSEF）的支持。该项目在美国国家科学基金（NSF）资助下为PI的研究增加了一个国际合作的维度。dmr - 9111673。＊＊＊

9307995 Oriani This award provides funds to permit Dr. Richard A. Oriani, Corrosion Research Center, University of Minnesota-Twin Cities, to pursue with Dr. Su-Il Pyun, Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), for 24 months, a program of cooperative research on the properties and mechanism of formation of passivating oxidic films on aluminum and on tungsten. Two important measurements, namely, (1) the kinetics of passivation and (2) the mechanical stress generated during film formation will be made in various electrolyte compositions and with various potential-time conditions. Oxidic films produced upon metal surfaces during corrosion of metals strongly reduce the rate of subsequent corrosion. This corrosion resistance in the case of aluminum and tungsten results from the formation of a thin passivating oxidic film. It is known that the formation kinetics and film characteristics vary with the electrolyte solution chemistry and the electrical potential at which the film is generated. Results of this research may produce a better understanding of corrosion and passivation processes that prevent further corrosion. The collaborators are highly respected researchers in the field of the proposal. 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. Korean participation in the project is supported by the Korea Science and Engineering Foundation (KOSEF). This project adds an international cooperative dimension to the PI's research under NSF Grant No. DMR-9111673. ***