Friday, July 4, 2014

Filiform Corrosion




To help prevent filiform corrosion development, the airplane should be:
(a) Spray washed at least every two to three weeks (especially in a warm, damp environment).
(b) Waxed with a good grade of water repellent wax to help keep water from accumulating in skin joints and around countersinks.
(c) Keep the airplane hangared to protect it from the atmosphere.
(d) Fly the airplane to promote aeration of enclosed parts.
(e) Ensure all vent/drain holes are open to ventilate the interior of airplane.
(3) To remove filiform corrosion once it has been discovered:
(a) Remove paint from corroded area.
(b) Remove corrosion by sanding area to metal surface, using either a ScotchBrite pad or 320 grit sandpaper (aluminum oxide or silicone carbide grit).
(c) Clean and refinish surface.