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AIRFRAME 02
Aircraft Finishes
| Question | Answer |
|---|---|
| What are the common types of paint used on aircraft? | Primers, enamels, lacquers, & epoxies |
| What is used with zinc chromate primer if it is too think and needs to be thinned? | Toluene |
| What are two types of dope used for aircraft finishes? | Nitrate & butyrate |
| What is the purpose of zinc chromate primer? | It serves as a corrosion resistant covering & base coat for the 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 pain? | 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 coat |
| What may cause spray paint sags and runs? | Applying too much paint to an area; or too much reducer in paint |
| What causes orange peel spray mottle? | Not enough reducer(too thick) or the wrong type of reducer for the ambient temperature; or material not uniformly mixed; or forced drying method too quick; or too little flash time between coats, or ambient temperature 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? | It occurs when moisture is trapped in the paint. Usually due to 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 manufacture's service manual or contact the manufacturer |
Created by:
Chisum
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