Publications

Differential imaging microscopy of physically complex surfaces undergoing atmospheric corrosion

Enos, David E.; Girard, Gerald R.

Frequently, optical observation of component materials is the only viable technique to evaluate degradation processes in-situ. Unfortunately, due to the visually complex nature of many surfaces (e.g., scratches, occlusions, etc.), the degradation process, particularly at early stages, is difficult or impossible to resolve. As a result, studies are limited to evaluating degradation well after initiation has taken place. Thus, there is a need for a technique that could be implemented utilizing image processing that allows the de-convolution of changes due to the degradation process of interest from the background "noise". An automated differential imaging system was constructed for in-situ studies of both aqueous and atmospheric environments to fulfill this need. The basic functionality of the Differential imaging system was demonstrated on gold plated copper and gold /nickel plated copper coupons exposed to a sulfide containing atmosphere. © 2011 by NACE International.