How to Remove Pitted Corrosion on an Aluminum Mast

Written by owen e. richason iv
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Pitted corrosion, also known as pitting corrosion, or pitting, is a localised corrosion that affects metal in a small, concentrated place on a metal surface. Left untreated, pitted corrosion will cause small holes to appear in the metal. Pitting corrosion can be found on aeroplanes, passenger and commercial vehicles as well as on boats. If you have a boat with an aluminium mast being affected by pitted corrosion, you can remove it yourself.

Skill level:
Moderately Easy

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Things you need

  • Wire coil brush
  • 2 tbsp baking soda
  • Measuring spoons
  • Measuring cup
  • 1 cup distilled water
  • Bucket
  • Sponge
  • Towel
  • Rust inhibitor

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Instructions

  1. 1

    Lay the aluminium mast down on a dock or leave it mounted to the boat, whichever is more feasible.

  2. 2

    Vigorously scrub the aluminium mast with a wire coil brush, knocking off as much of the pitted corrosion as possible.

  3. 3

    Combine baking soda with distilled water in a bucket, and stir to mix thoroughly.

  4. 4

    Rub the pitted corrosion on the aluminium mast with the baking soda/distilled water mixture using a sponge. Let it soak for 10 to 15 minutes, then scrub the corrosion again with the wire coil brush.

  5. 5

    Empty the bucket; rinse the aluminium mast with distilled water. Dry the aluminium mast with a towel, then spray the aluminium mast with a light coat of rust inhibitor to finish.

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