Materials World Network: Local Surface Chemistry and Atmospheric Corrosion of Cu-Zn Alloys

材料世界网：铜锌合金的局部表面化学和大气腐蚀

• 批准号: 0856009
• 负责人: Steven Baldelli
• 金额: $ 39万
• 依托单位: University of Houston
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-12-15 至 2013-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0856009&HistoricalAwards=false
• 关键词: Materials; World; Network; Local; Surface

This award by the Division of Materials Research to University of Houston is to study the role of microscopic heterogeneities in the corrosion of metal alloy surfaces. This Materials World Network award is cofounded and managed by the Metals and Metallic Nanostructures program. This proposed research involves the use nonlinear optical spectroscopy and scanning probe techniques to study the atmospheric corrosion of a model metal alloy surface based on Cu:Zn alloy. Main objectives of the project are: 1) Study the local atmospheric corrosion of Cu:Zn alloys; and 2) Compare the reactions on protected alloys surfaces with the initiation of corrosion reactions. To probe local regions of the alloy surface, Sum Frequency Generation Imaging Microscopy will be used as a local probe on the surface species formed under reaction conditions. This technique has the ability to identify sub-monolayer of surface adsorbates based on their vibrational spectra. In addition, Scanning Electrochemical Microscopy will be used to identify cathodic and anodic regions of the surfaces where the corrosion process occurs. These techniques will be applied to bare and protected surfaces to study the effect of inhibition on local corrosion. These studies will be carried out in collaboration with scientists at Royal Institute of Technology, Stockholm, Sweden. The results from these studies are expected to provide chemical maps of corrosion activity related to molecular speciation in those locations, and thus a molecular-level description of local corrosion events. Students on this project will be developing experimental and scientific skills through designing of the research project, and writing and presenting results at national meetings. International exchange, travel, research experience by students and faculty in the collaborating institutions are salient features of this collaborative multidisciplinary research.This multidisciplinary research program is expected to positively impact both undergraduate and graduate student members of the research team In addition, students will be exposed to in the use and application of a number of analytical methods including advanced spectroscopic methods to study the atmospheric corrosion at the surface. They also will be trained in material surface characterization with an emphasis on the chemistry of corrosion at a microscopic level. Finally, this project will greatly enhance our younger scientist skills and development using modern laser techniques. The knowledge gained will provide a detailed model on the local chemistry of corrosion that has been very difficult to characterize until now. The planned International collaboration with Royal Institute of Technology in Sweden will provide opportunities for students and faculty to do research in the collaborating laboratories.

该奖项由休斯顿大学材料研究部颁发，旨在研究微观非均质性在金属合金表面腐蚀中的作用。该材料世界网络奖由金属和金属纳米结构项目共同创立和管理。本研究采用非线性光谱学和扫描探针技术研究了Cu:Zn合金模型金属合金表面的大气腐蚀。本项目的主要目标是：1)研究Cu:Zn合金的局部大气腐蚀；2)对比保护合金表面的反应与腐蚀反应的引发。为了探测合金表面的局部区域，将使用Sum Frequency Generation Imaging Microscopy作为在反应条件下形成的表面物种的局部探针。该技术能够根据表面吸附物的振动谱识别其亚单层结构。此外，扫描电化学显微镜将用于识别腐蚀过程发生的表面的阴极和阳极区域。这些技术将应用于裸露和受保护的表面，以研究缓蚀对局部腐蚀的影响。这些研究将与瑞典斯德哥尔摩皇家理工学院的科学家合作进行。这些研究的结果有望提供与这些位置的分子物种形成相关的腐蚀活性的化学图谱，从而在分子水平上描述局部腐蚀事件。参与本项目的学生将通过设计研究项目，撰写并在国家会议上展示成果来发展实验和科学技能。国际交流、旅游、学生和教师在合作机构的研究经验是这种多学科合作研究的显著特点。这个多学科的研究项目预计将对研究团队的本科生和研究生成员产生积极的影响。此外，学生将接触到包括先进光谱方法在内的许多分析方法的使用和应用，以研究大气表面的腐蚀。他们还将接受材料表面表征方面的培训，重点是微观层面上的腐蚀化学。最后，这个项目将大大提高我们年轻科学家的技能和发展使用现代激光技术。所获得的知识将为腐蚀的局部化学提供一个详细的模型，到目前为止，腐蚀的局部化学一直很难表征。计划与瑞典皇家理工学院的国际合作将为学生和教师提供在合作实验室进行研究的机会。