Cleaning And Corrosion Flashcards
Discuss the general precaution that should be observed when washing and airplane.
Avoid or protect areas, which may be damaged or contaminated, such as: Pitot and static ports, hinges, sealed areas and bearings.
What are some of the more common light-duty cleaning agents?
Soap and detergents
What materials are commonly used as heavy duty cleaners?
Solvents and emulsions
What are the preferred cleaners for plastic surface such as windshields?
Soap and water
What type of cleaning agent is used to remove grease,oil or fuel from aircraft tires?
Soap and water
What are the factors that effect the type of corrosion
- Atmospheric conditions
- Presence of dissimilar metals
- The type of metal
- Condition of protective coatings and size and shape of the metal
Name at least three forms of corrosion.
- Surface 2. Stress 3. Intergranular 4. Fretting and dissimilar
Name at least one cause of filliform corrosion.
- Improper or incomplete curing of the wash primer prior to painting.
What are the visible signs of filliform corrosion?
Blistered paint surface or worn or thread-like tracks or patterns under paint.
What are the two primary factors that may cause development of stress corrosion cracks?
Corrosive environment and sustained tensile stress.
What are the visible signs of fretting corrosion?
Corrosion residue had dark, smoky appearance and often appears around and streaming back from rivet heads.
List five examples of areas in an aircraft that are prone to corrosion.
- Battery compartments 2. Fuel tanks 3. Exhaust tail areas
- Landing gear and wheel well 5. Galleys and lavatories
Provide at least four examples of procedures used to prevent corrosion.
What specific operations for corrosion preventive maintenance
- Cleaning 2. Lubrication 3. Corrosion Treatment 4. Inspection 5. Touch painting
- Use of sealants
What is the purpose of Alodine?
It is a chemical process that puts a protective file on aluminum alloys. This film prevents corrosion resistance and paint adhesion.
Describe the effects of using steel brushes or steel wool to remove corrosion from aluminum surfaces.
They can’t be used because steel particles can become embedded in the aluminum and cause corrosion.
Describe the tools that should be used to remove corrosion from anodized aluminum surfaces.
Scotch-brite, fiber bristle brushes, aluminum wool or aluminum wire brushes.
What’s the best why to protect piano hinges from corrosion?
Keep them clean and properly lubricated.
Is there and requirements for cleaning and aircraft prior to and annual of 100 hour inspection?
It is a legal requirement as specified in the FAR Part 43 Appendix D.
What is fretting corrosion
It’s when to surfaces are rubbing together
What methods are used from removing dust from aircraft structures
Buffing, abrasive paper, compounds, wire brushes and steel wool
Name the steps for cleaning corrosion
- Clean the area and surrounding area
- Remove the corrosion and paint in the area
- Treat the area
- Than repaint the area
What product should be used to clean a aircraft engine
Karisen or solvent
What is the difference between wet wash and dry wash aircraft cleaning
Wet wash is for heavier soils and heavy duty cleaning areas
Dry wash is for lighter cleaning such as dust
What method should be used to to check the internal structure of a wing for corrosion.
Xray
What method should be used for checking a nonferrous metal part for intergranular corrosion
Eddy current
