A device to measure corrosion of composite boiler tubes

We evaluated the ability of an electromagnetic inductance (EMI) gauge to measure the cladding/overlay thickness of composite boiler tubes. The evaluation was based on cladding/overlay thickness measurements made on sections of composite tubes provided by suppliers, on a simulated corroded sample and on existing and replacement composite tubes in a recovery boiler. We conclude that the device is capable of providing accurate cladding/overlay …