How to Regalvanize a Galvanized Nut

A galvanized coating covering a plated nut protects it from rust caused by moisture. Excessive amounts of rust will weaken the nut or cause the internal threads to corrode to a point that the nut will not thread on a male threaded part. Repairing damaged galvanized coating on a nut restores its ability to resist corrosion. One method of galvanizing does not require specialized equipment and still maintains the amount of protection needed to keep the nut rust-free.

Wire brush
Rubber gloves
Rag
Degreasing solvent
Cardboard
Cold galvanizing spray

Instructions

- 1
  Run a wire brush across all surfaces of the damaged galvanized nut until all dirt and white corrosion is removed.
- 2
  Put on a pair of rubber gloves. Set the cleaned nut on a rag. Pour degreasing solvent over the nut. Rub the nut with the solvent-soaked rag.
- 3
  Remove the nut from the rag. Allow the nut to dry for five to ten minutes.
- 4
  Set up cardboard to protect the surrounding area from cold galvanizing spray. Place the nut in the center of the cardboard.
- 5
  Shake a can of galvanizing spray for the time specified on the can. Hold the can 12 inches from the surface of the prepared nut. Spray a thin coat of galvanizing spray on the nut. Allow the cold galvanizing spray to dry for two to four hours -- depending on humidity and temperature.
- 6
  Apply two to three additional coats of cold galvanizing spray to the nut before removing it from the cardboard. Allow the coating to cure for 24 to 48 hours before installing the nut.

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