A Plain-English Guide to Water Path Control for Copper Alloy Plates
https://welding-inspection-notes.northstarcolumn.com/posts/ultrasonic-weld-testing-for-bridge-steelwork-common-pitfalls-and-fixes
A Plain-English Guide to Water Path Control for Copper Alloy Plates Copper alloy plates can vary in thickness and acoustic response. Water carries sound between the transducer and the part without firm probe contact