Product Code: ICAL06_1405

In Situ Evaluation of Metallic Coatings via Laser Plasma Spectroscopy
Authors:
Bhupendra Gupta, GE Infrastructure - Aviation; Cincinnati OH USA
Pamela Benicewicz, GE Global Research; Niskayuna NY USA
Presented at ICALEO 2006

We present a method and apparatus that provides in situ, near real-time evaluation of metallic coatings used as protective barriers for various industrial applications. Identification of the elemental constituents of the coating and substrate is accomplished using the technique of laser plasma spectroscopy, whereby optical emissions from the plasma formed by focusing a high energy pulsed laser onto a part coating or substrate surface uniquely identify the elements present in the vaporized material. We present several applications, including use of this technique to determine coating presence and coating composition