We’ve had recurring issues with waterwall corrosion in our HRSG. What are the best ways to detect it early and prevent it from spreading?
We use phased array ultrasonic testing (PAUT) on a regular basis. It’s effective for identifying thinning areas before leaks occur.
Proper oxygen control in the feedwater is critical. High dissolved oxygen accelerates corrosion.
Inspect the welds thoroughly. Corrosion often starts near poor welds or areas with residual stresses.