Aircraft Finishes Flashcards
What are the common types of paint used on aircraft?
Enamel
Epoxies
Lacquers
Primers
What are two types of dope used for aircraft finishes?
Nitrate and butyrate
What is used with zinc chromate primer if it is too thick and needs to be thinned?
Toluene
What is the purpose of zinc chromate primer?
It serves as a corrosion resistant covering and base coat for protective topcoats
Many of the solvents and thinners used in modern finishing systems are toxic; what health safety precaution should the mechanic observe?
Some form of respirator or mask must be worn when spraying.
What are three methods of applying paint?
Dipping, brushing, and spraying
What paint system is compatible with epoxy topcoats?
Any paint system in good condition
What is the cause of spray dust?
Incorrect spray gun setting of air pressure, paint flow, or spray pattern, or spray gun being held too far from the surface, or material being improperly thinned, or the wrong reducers being used with the finish coats.
What may cause spray paint sags and runs?
Applying too much paint to an area or too much reducer in the paint
What causes orange peel spray mottle?
Not enough reducer or the wrong type of reducer for the ambient temperature.
Material not uniformly mixed, forced drying method too quick, or too little flash time between coats, or ambient temp is too hot or too cold
What is blushing paint finish?
A dull milky haze that appears in a paint finish
What will cause a blushing paint finish?
Moisture is trapped in the paint. Moisture in the air supply, adverse humidity, or changes in temperature.
What could be the result of applying a coat of dope when the temperature of the dope room is too high?
Pinholes in the dope film
What areas must be protected from damage when using paint remover/stripper?
All window material, vents and static ports, rubber seals and tires, and composite components that may be affected by the chemicals.
How can a mechanic determine if the control surfaces need to be checked for balance after painting?
Refer to the manufacturer’s service manual and/or contact the manufacturer.
