Paper: High resolution ultrasound wall thickness measurements through polyester coating and real-time process control (pdf, 334 kb)
Epoxy-, polyester-, paint and similar coatings are often used for external corrosion protection on pipelines and other process equipment. It is well known that ultrasound transducers can determine wall thickness through such coatings. This paper explores how the sensitivity of high resolution pulse-echo ultrasound measurements from permanently installed immersion sensors are affected.