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21 Cards in this Set
- Front
- Back
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Identify the areas of an aircraft that are most prone to corrosion. |
Battery compartment Exhaust system and exhaust trails Wheel Wells A lower area of the belly Piano hinges Areas of dissimilar metal contracts Welded areas Inside of fuel tanks Metal fittings under high stress Lavatories and food service areas service areas |
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Where is filiform corrosion most likely to occur on an aircraft? |
Under a coating of top coat enamel, Caused by improperly cured primer. |
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Where is fretting corrosion most likely to occur on an aircraft? |
Between 2 components where there is a relative amount of movement. |
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Where is intergranular corrosion most likely to occur on an aircraft? |
Along grain boundaries of aluminum alloys that have been improperly heat treated. |
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Where is dissimilar metal corrosion most likely to occur on an acraft? |
Anywhere different metals come in contact with each other. |
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Where is stress corrosion most likely to occur on an aircraft? |
On any components that are under a tensile stress. |
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What must be done to a piece of aluminum alloy to remove surface corrosion and to treat the metal to prevent further corrosion? |
Remove the corrosion with a bristle brush. Neutralize the surface with some type of conversion coating. Protect the surface from further corrosion with a coat of paint. |
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What is the use to keep corrosion from forming on structural aluminum alloy? |
An oxide coating or aluminum cladding |
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How may rust be removed from a highly stressed metal part? |
Glass bead blasting Mild abrasive paper or Fine buffing compound |
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Why are piano type hinges prime spots for corrosion? |
It is made of dissimilar metals and the hinge tends to trap moisture. |
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What tools are proper for removing corrosion from aluminum alloy? |
Aluminum wool or aluminum wire brushes. Severe corrosion can be removed with a rotary file. |
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What is used to clean transparent plastic windshields and windows of an aircraft? |
Mild soap and clean water. |
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What is used to neutralize the electrolyte from a lead acid battery that has been spilled on an aircraft structure? |
Solution of bicarbonate soda and water. |
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What is used to neutralize the electrolyte from a nickel cadmium battery that has been spilled on an aircraft structure? |
Solution of boric acid and water or vinegar. |
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What solvent is recommend it for removing grease from aircraft fabric prior to doping it? |
Methyl Ethyl Ketone (MEK) or lacquer thinner. |
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What can be used to repair the anodized surface of an aluminum alloy part? |
Alodine. |
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What type of device is used to remove surface corrosion from a piece of Magnesium alloy. |
A Stiff hog bristle brush |
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How is the inside of structural steel tubing protected from corrosion? |
The tubing is filled with hot linseed oil and then drained. |
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Why should fabrics and plastics be cleaned only with recommended cleaners? |
Recommended cleaners cause the least amount of deterioration. |
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Name at least 3 forms of corrosion. |
Surface corrosion Intergranular Filliform Dissimilar metal Pitting Fretting |
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What are some heavy duty cleaners? |
Solvents and Emulsion cleaners. |
