详情

Laser Spectroscopy for Rapid Profiling of Steel Bridge Coatings, Corrosion, and Heavy Metals

项目名称：	Laser Spectroscopy for Rapid Profiling of Steel Bridge Coatings, Corrosion, and Heavy Metals
摘要：	This project will develop and demonstrate the application of laser induced breakdown spectroscopy to rapidly identify and profile the presence and severity of corrosion under layers of coatings on steel structures and the presence of heavy metals imbedded in the coatings. The project consists of two stages. Work in the first stage focuses on calibrating an initial set of samples (steel coupons) with commercially available coatings for detecting the presence of heavy metals and corrosion using laser induced ablation technology to generate spectra for analysis. Sample coupons will be collected and/or prepared and characterized by conventional means. Multivariate (chemometric) calibration models will be developed by comparing laser fingerprints to the known properties of the collected samples. An assessment will be made of the effectiveness of the approach. Work will also be initiated on the development of a Corrosion Index for assessing the severity of the corrosion detected. In the second stage of the project, the final calibration studies will be completed. This will entail continued analysis of additional coatings and corrosion samples, if needed, for the development of the models, to expand the data base, and to further develop the Corrosion Index concept. Blank testing, using unknown samples to validate the effectiveness of the models will be undertaken. Engineering and economic analyses of the proposed methodology will also be undertaken to develop system requirements for commercialization. Work during the first quarter focused on identifying and collecting samples and performing preliminary testing using available corroded sample coupons to help develop modeling approaches that could be used to categorize corrosion. Preliminary results indicated that laser analysis could readily distinguish between rusted, blistered, and corrosion-free areas of steel.
状态：	Active
资金：	137238.00
资助组织：	Federal Highway Administration<==>American Association of State Highway & Transportation Officials (AASHTO)<==>National Cooperative Highway Research Program
项目负责人：	Jawed, Inam
执行机构：	Chesner Engineering, PC
开始时间：	20141210
主题领域：	Bridges and other structures；Highways；Maintenance and Preservation