How to Remove Corrosion on a Galvanized Pipe
- 1). Insert a wire brush attachment onto the end of a power drill. Rotate the wire brush over the corroded portion of the pipe to remove loose dirt and corrosion.
- 2). Dab naval jelly generously onto remaining specks or patches of corrosion on the pipe using a disposable paintbrush. Wear safety glasses and acid-proof gloves when handling naval jelly and throughout the remaining repair. Let the acidic jelly permeate the corroded pipe for 30 minutes.
- 3). Flush the naval jelly off the pipe using water. Thoroughly rinse the pipe with a garden hose.
- 4). Dry the wet pipe with a towel, since the exposed metal is now extremely susceptible to corrosion.
- 5). Saturate clean, fine-grade steel wool with mineral spirits. Scrub the previously corroded section of pipe with the steel wool to eradicate dissolved rust and lingering grime. Remove all foreign material from the pipe to provide a smooth surface for galvanizing.
- 6). Shake a can of cold galvanizing spray for three minutes to mix the zinc contents. Spray the galvanizing zinc onto the exposed pipe using light, sweeping strokes. Always hold the can 12 inches from the pipe for best distribution of the zinc. Make the galvanized zinc coating 3 to 4 milliliters thick.
- 7). Let the cold galvanizing spray cure on the pipe for 24 to 48 hours, depending on the galvanizing spray manufacturer. Only one coat of the galvanizing spray is necessary for protective coverage.
Source...