Nickel sulfamate peeling: practical fix for a stubborn problem

Summary for nickel sulfamate peeling Discussion

Peeling of nickel sulfamate from steel is discussed as a likely bath-contamination and precleaning problem rather than a brightener issue, since Bill Hemp says the line already used only a wetter, a new soak and electrocleaner, stronger muriatic acid, and corrected stray currents. In response, Anders Sundman says a company he worked for saw the same issue regularly on barrel work and believed iron buildup in the bath from parts settling in the tank was a major cause. He also notes they used a carbon cartridge on the tanks every week to remove organic buildup, though that unfortunately stripped out the wetter and required adding it back. His practical takeaway is that keeping iron and organics under control helped keep peeling under control, suggesting the bath condition and contamination should be checked closely.