Detection and Performance of Defects in Aluminum Coated Steels

摘要

The measured variations in current density resulting from exposed steel and iron containing inclusions have been used as a nondestructive method for locating these heterogeneities on aluminum coated steel. The measurements were carried out with a vibrating probe in a borate solution where the dissolution rates of both iron and aluminum are sufficiently low to prevent any damage to the coating or underlying metal. The difference in the anodic and cathodic polarization behavior of predominant inclusions was used to determine the ratio of their relative contributions to the applied current. (ERA citation 09:010206)