Corrosion detection
What is another name for smoking rivets?
Fretting corrosion
Anodizing produces a protective coating of aluminum oxide which
is quite hard
Which NDI method is most successful in detecting corrosion in nonferrous metals?
Ultrasonic inspection
What does spilled mercury on aluminum mean?
Causes rapid and severe corrosion that is very difficult to control.
Caustic cleaning products used on aluminum structures may produce what negative effect?
Corrosion
How can intergranular corrosion be detected?
By ultrasonic or X-ray inspection
When and/or where is galvanic corrosion most likely to occur?
At the interface of a steel fastener and aluminum alloy inspection plate in the presence of an electrolyte.
What do you call a non-electrolytic chemical treatment for aluminum alloys to increase corrosion resistance and paint-bonding qualities?
Alodizing
What is the primary cause of intergranular corrosion?
Improper heat treatment
What is an anode?
Metal that gives up electrons
What is galvanizing?
A coating of zinc that makes an oxide coating when penetrated which protects the metal.
How are magnesium engine parts cleaned?
Wash with a commercial solvent or grit blast.
Corrosion, which occurs with most metals, is the result of
a tendency for them to return to their natural state.
What is the best reason why an aircraft should have a good polish on its finish?
It denies corrosion a place to start.
Which of the following types of electroplating will give good protection to steel and is most commonly used on aircraft hardware?
Cadmium