cleaning and corrosion control Flashcards
what is used to clean transparent plastic windshields and windows of an aircraft
mild soap and lost of clean water
what is used to neutralize the electrolyte from a lead-acid battery that has been spilled on an aircraft structure?
a solution of bicarbonate of soda and water
what is used to neutralize the electrolyte from a nickel-cadmium battery that has been spilled on an aircraft structure?
a solution of boric acid and water, or vinegar
what solvent is recommended for removing grease from aircraft fabric prior to doping it?
Methyl Ethyl Ketone (MEK) or lacquer thinner
where is filiform corrosion most likely to occur on an aircraft?
under a dense coating of topcoat enamel such as polyurethane. filiform corrosion is caused by improperly cured primer
where is fretting corrosion most likely to occur on an aircraft?
in a location where there is a slight amount of relative movement between two components, and no way for the corrosive residue to be removed as it forms
where is intergranular corrosion most likely to occur on an aircraft?
along the grain boundaries of aluminum alloys that have been improperly heat-treated. extruded aluminum alloy is susceptible to intergranular corrosion
where is dissimilar metal corrosion most likely to occur on an aircraft
anywhere different types of metal come in contact with each other, especially where moisture is present
where is stress corrosion most likely to occur on an aircraft?
in any metal component that is continually under a tensile stress. the metal around holes in castings fittings with pressed-in bushing is susceptible to stress corrosion
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 residue with a bristle brush or a nylon scrubber. neutralize the surface with chromic acid or with some type of conversion coating. protect the surface from further corrosion with a coat of paint
what is used to keep corrosion from forming on structural aluminum alloy?
an oxide coating or aluminum cladding
how may rust be removed from a highly stressed metal part?
by glass bead blasting, by careful polishing with mild abrasive paper, or by using fine buffing compound on a cloth buffing wheel
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.
what can be used to repair the anodized surface of an aluminum alloy party?
a chemical conversion coating such as alodine
what type of device is used to remove surface corrosion from a piece of magnesium alloy?
a stiff hog-bristle brush
