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1103 Corrosion test
| Question | Answer |
|---|---|
| What type of corrosion directly attacks grain boundaries of aluminum alloys ? | Intergranular corrosion |
| What type of corrosion occurs when there is slight movement between close-fitting metal parts? | Fretting corrosion |
| What type of corrosion most often on bare aluminum alloys? | Surface corrosion |
| What is dissimilar metal corrosion? | When 2 different metals are in contact in the presence of an electrolyte |
| What is a type of stress corrosion? | Sustained tensile stress causes corrosion |
| What type of corrosion usually occurs over a wide area and is somewhat equal in dispersion? | Surface corrosion |
| What is pitting corrosion? | A localized form of corrosion characterized by the formation of cavities and a white powder on the surface of metal. |
| What is filiform corrosion | A special type of corrosion that forms under thin coatings of paint in the form of randomly distributed threadlike filaments |
| What is galvanic corrosion? | When 2 dissimilar metals are in direct contact in a conducting liquid |
| What is exfoliation corrosion? | An advanced form of filiform corrosion, and it lifts up the grains |
| What is fretting corrosion? | Corrosion that occurs when there is slight movement between 2 metals |
| What is concentration cell corrosion? | When 2 or more areas of a metal surface are in contact with different concentrations of the same solution |
| What is surface corrosion? | An electrochemical reaction that is uniformly over the entire exposed surface and at the edge of metal joints |
| What is concentration corrosion also known as? | Crevice corrosion |
| What is galvanic corrosion also known as? | Dissimilar metal corrosion |
| Metal which depends on a tightly adhering passive film, usually an oxide, for corrosion protection, is prone to rapid corrosive attack by what? | active passive cell corrosion |
| What causes hydrogen enridlement? | The use of non-recommended cleaning compounds |
| What openings should be closed prior to washing an aircraft? | Pitot and static lines |
| What is an emulsion type cleaner? | A chemical cleaner used to loosen dirt, grease, oxides, and carbon deposits from the surface of an aircraft |
| What cleaners will be most effective for dissolving grease or oil? | Solvents |
| What elements are needed to create an electrochemical corrosion? | Anode, cathode, and electrolyte |
| How is electrochemical corrosion created? | Electrons traveling from the anode to the cathode |
| In electrochemical corrosion what area will form corrosion? | Anodic |
| Direct exposure of a bare surface to a caustic or gaseous agent causes | Chemical corrosion |
| Regarding surface oxide films, what process is an electrolytic treatment often performed by the manufacturing factories? | The anodizing process |
| What does the term 'ferrous' apply to? | The group of metals having iron as their principle constituent |
| What is fusibility? | Liquid adheres to other materials |
| What can be used to remove corrosion from highly stressed steel surfaces? | steel wire brush |
| What is recommended for washing salt water residue from an aircraft? | Fresh water |
| What are 4 areas that should be inspected for corrosion regularly? | 1) Battery compartment 2) Exhaust 3) Engine inlet 4) Landing gear |
| What corrosion is caused by battery acid, salt water, flux, or entrapped liquids? | Chemical corrosion |
| What alloys are made up of entirely of small crystalline regions called what? | Grains |
Created by:
mattpayne001