Flashcards on Aircraft Corrosion and Maintenance Practices
Aircraft Corrosion & Maintenance: Types, Causes, & Prevention
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Aircraft Corrosion Prevention and Surface Finishing
22 cards
Card 1
Question: What are the five common forms of corrosion on aircraft?
Answer: Surface corrosion, dissimilar metal corrosion, intergranular corrosion, stress corrosion, and fretting corrosion.
Card 2
Question: What causes fretting corrosion?
Answer: Slight relative motion between two normally resting mating surfaces, producing pitting and large quantities of fine debris.
Card 3
Question: How can fretting corrosion be identified?
Answer: By pitting of mating surfaces and presence of powdered residue between the surfaces.
Card 4
Question: What factors affect the form and formation of corrosion?
Answer: Atmospheric conditions, size and shape of the metal, the type of metal, and the corrosion-producing agents present.
Card 5
Question: Where is dissimilar metal corrosion most likely to occur on an aircraft?
Answer: Where different types of metal contact each other, especially in the presence of moisture.
Card 6
Question: Where is stress corrosion most likely to occur on an aircraft?
Answer: In metal components continually under tensile stress, such as metal around holes in castings fitted with pressed-in bushings.
Card 7
Question: Why are piano-type hinges prime spots for corrosion?
Answer: Because of dissimilar metal contact between the steel pin and aluminum hinge and their design that tends to trap contaminants.
Card 8
Question: What areas of an aircraft are more prone to corrosion?
Answer: Areas where water may get trapped or areas under high stress, such as battery compartments, exhaust systems and trails, wheel wells, bilge areas, pian
Card 9
Question: What are acceptable methods for removing rust from aircraft materials (except on highly stressed steel surfaces)?
Answer: Abrasive papers and compounds, small power buffers with buffing compounds, hand wire brushing, and steel wool.
Card 10
Question: What is an acceptable method for removing surface corrosion from titanium and highly stressed metal parts?
Answer: Stainless steel wool or brush, aluminum oxide paper, Scotch-Brite, abrasive blast with glass beads, or hand polish with aluminum polish and a soft cot