Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
General
Cleaning and Corrosion
| Question | Answer |
|---|---|
| What are the five common forms of corrosion? | F-DISS: Fretting, Dissimilar metal, lntergranular, Surface, and Stress corrosion. |
| Name at least three factors that influence corrosion? | The temperature, type of metal, availability of electrolytes and dissimilar metals, condition of protective coating. |
| What are the two general conditions that may cause stress corrosion cracking? | Sustained tensile stress, and a corrosive environment. |
| What is the cause of fretting corrosion? | It is characterized by pitting of the surfaces and the generation of large quantities of fine debris between the surfaces, identified as smoking rivets. |
| What is the principal cause of filiform corrosion? | Surfaces that have not had a proper chemical treatment prior to painting. |
| Where is intergranular corrosion most likely to occur? | Typically, along the grain boundaries of extruded materials. |
| What is another name for dissimilar metal corrosion? | Galvanic corrosion. |
| What are the factors which affect the type (form) of corrosion? | The form of corrosion varies with atmospheric conditions, size and shape of the metal, the type of metal, and the corrosion-producing agents present |
| What methods are used for removing rust from aircraft materials? | Except on highly stressed steel surfaces (like oleo struts), the use of abrasive papers and compounds, small power buffers and buffing compounds, hand wire brushing and steel wool are all acceptable methods of removing rust. |
| What is an acceptable method for removing surface corrosion from titanium? | Several methods may be used including a stainless-steel brush, aluminum oxide sandpaper, Scotch Brite‘”, abrasive blasting using glass beads, or hand polish using aluminum polish and a soft cotton cloth |
| What specific operations are part of corrosion-preventative maintenance? | Adequate cleaning, periodic lubrication, detailed inspection, prompt corrosion treatment, touch up of damaged paint, sealing, use of protective covers, and daily wipe-down of exposed critical areas. |
| Name the steps for corrosion removal | Clean and strip the corroded areas, remove as much corrosion as possible, neutralize any residual material remaining in pits and crevices, restore protective surface films and paint. |
| What tools are approved for cleaning corroded anodized surfaces? | Fiber bristle brushes, aluminum wool, and aluminum wire brushes. |
| What is used to keep corrosion from forming on aluminum alloy? | An oxide coating or aluminum cladding. |
| What can be used to repair the anodized surface of an aluminum alloy part? | Alodine or other chemical conversion coatings. |
| What products should be used to clean an aircraft engine? | A fine spray of kerosene or solvent. |
| What should be used to clean grease, fuel, or oil from aircraft rubber tires? | Soap and water. |
| Why should only recommended cleaners be used on aircraft fabric and plastics? | Their use causes less degradation of the material. |
| Name 5 areas of an aircraft that are more prone to corrosion? | Battery compartments, bilge areas, wheel wells and landing gear, flap recesses, lavatory, galley, and other areas where water might be entrapped. |
| What form of corrosion can be found in battery compartments? | Direct chemical corrosion |
| Why are piano-type hinges prime locations for corrosion? | Piano hinges use dissimilar metals (steel pins and aluminum hinges), and tend to trap contaminants - between the pin and hinge surfaces. |
| What is used to neutralize a lead-acid battery electrolyte? | A solution of baking soda and water. |
| What is the difference between wet wash and dry wash aircraft cleaning? | Wet wash (water and an agent) cleaning is used to remove oil, grease, carbon deposits, and soils ' except for corrosion and oxide films. Dry wash (compressed air or cloth) cleaning is used to remove film, dust, and small accumulations of dirt |
| What are types of light duty and heavy-duty aircraft cleaning agents? | Light duty cleaning agents are soap and synthetic detergent. Heavy duty cleaning agents are solvents and emulsion type cleaners. |
| What would you do before cleaning a wind screen? | Wet the surface before cleaning to prevent scratching. |
| What does filiform corrosion look like and where can it be found? | Filiform corrosion appears to look like thread or worm like puffiness of the painted surface. It occurs between the metal's surface and the protective coating. |
| How is the inside of structural tubing prevented from corroding? | Hot linseed oil can be poured into the hole, then the excess is drained. |
Created by:
llanesjc29