Using Ultrasonic Coating Thickness Gages

摘要

The first hand-held instrument specifically designed to ultrasonically measure coating thickness appeared 10 years ago. Many industries now use this form of nondestructive testing technology in their quality programs. They support or replace destructive measurement techniques for concrete, wood, plastics and other materials. This article describes how ultrasonic techniques are used to nondestructively measure the thickness of paint films over non-metal substrates. It includes a discussion on the factors influencing accuracy and some practical applications.