Corrosion Mapping is a non-invasive, nondestructive ultrasonic testing (UT) technique which is used to map out variations in metal thickness which can be viewed as color images. These variations are very often signs of corrosion. Corrosion mapping is primarily used in the examination of pipelines, piping systems, pressure vessels, reactors, and storage tanks.
This involves using either an automatic or semi-automatic powered mechanical scanner to scan the surface of a part or component, emitting ultrasonic waves in order to take thickness measurements. These measurements are then uploaded to a computer where they are converted to a color coded image. This image makes it possible to visualize the thickness variations in a piece of equipment in order to determine the need for repair or further condition assessment.
The method has a high degree of repeatability and multiple scans can be taken over time to track the progress of corrosion and or mechanical wear. On the other hand, it has similar limitations as well. The preparations that are required to use this method are extensive and the process requires a great deal of interaction between the operating personnel and the inspectors.
Hi-Tech Testing has a dedicated, experienced staff to provide corrosion mapping services in a way that meets all code, standard and specification requirements. Contact us to learn more about how our services can meet your needs.