Cleaning & Corrosion Control Flashcards
- Name at least three factors that influence corrosion.
Temperature
Type of metal
Condition of protective coating
- What are the two general conditions that may cause stress corrosion cracking?
Sustained tensile stress & a corrosive environment
- What is the principal cause of filiform corrosion?
Surfaces that been cleaned properly before painting
- Where is intergranular corrosion most likely to occur?
Along grain boundaries of extruded materials
- What is another name for dissimilar metal corrosion?
Galvanic corrosion
- What are the factors which affect the type of corrosion?
Atmospheric conditions
Size & shape of metal
Type of metal
Corrosion producing agents present
- What methods are used for removing rust from aircraft materials?
Abrasive papers & compounds
Small power buffers
Hand wire brushing & steel wool
- What is an acceptable method for removing surface corrosion from titanium?
Stainless steel brush
Aluminum oxide sandpaper
Scotch brute
Abrasive blasting using glass beads
- What specific operations are part of corrosion preventative maintenance?
Adequate cleaning Periodic lubrication Detailed inspection Prompt corrosion treatment Touch up damaged paint Sealing Protective covers
- Name the steps for corrosion removal.
Clean & strip corroded areas
Remove as much corrosion as possible
Neutralize any residual material remains in pits or cracks
Restore protective surface films & paint
- What tools are approved for cleaning corroded anodized surfaces?
Fiber bristle brushes
Aluminum wool
Aluminum wire brushes
- What is used to keep corrosion from forming on aluminum alloy?
Oxide coating or aluminum cladding
- What can be used to repair the anodized surface of an aluminum alloy part?
Aldine or other chemical conversion coatings
- What products should be used to clean aircrafts engine?
A fine spray of kerosene or solvent
- What should be use to clean grease, fuel, or other oil from aircraft rubber tires?
Soap & water
- Why should only recommended cleaners be used on aircraft fabric & plastics?
Causes less degradation of material
- Name five areas of an aircraft that are more prone to corrosion.
Battery compartments Wheel wells & landing gear Lavatory Valley Flap recesses Bilge areas
- What form of corrosion can be found in battery compartments?
Direct chemical corrosion
- Why are piano-type fingers prime locations for corrosion?
Piano hinders use dissimilar metals and tend to trap contaminant between them
- What is used to neutralize a lead-acid battery electrolyte?
Baking soda & water
- What is the difference between “wet wash” and “dry wash” aircraft cleaning?
Wet Wash - water & agent
Dry Wash - compressed air & cloth
- What are types of light duty and heavy duty aircraft cleaning agents?
Light duty - soap & synthetic detergent
Heavy duty - solvents & emulsion type cleaners
- What would you do before cleaning a wind screen?
Wet the surface to prevent scratching
- What does filiform corrosion look like & where can it be found?
Looks like craters on the moon. It occurs between metals surface & protective coatings
- How is the inside of structural tubing prevented from corroding?
Hot linseed oil coats the inside
