Podcast
Questions and Answers
What type of corrosion can occur when dissimilar metal skins are riveted together?
What type of corrosion can occur when dissimilar metal skins are riveted together?
- Surface corrosion
- Galvanic corrosion (correct)
- Stress corrosion
- Intergranular corrosion
Where can galvanic corrosion take place?
Where can galvanic corrosion take place?
- Where metal is exposed to battery fumes
- Where dissimilar metal skins are riveted together (correct)
- Where cracks form along the sides of a structure
- Where stress is applied to a structure
How does stress corrosion differ from intergranular corrosion?
How does stress corrosion differ from intergranular corrosion?
- Stress corrosion causes rapid crack growth at the end of a crack (correct)
- Intergranular corrosion dulls the surface of the structure
- Stress corrosion attacks the sides of a crack uniformly
- Intergranular corrosion is caused by battery fumes
What causes the dulling of the surface in surface corrosion?
What causes the dulling of the surface in surface corrosion?
In which type of corrosion will there be a rather uniform attack over the entire surface area?
In which type of corrosion will there be a rather uniform attack over the entire surface area?
What happens if the deposits from surface corrosion are not removed and the surface remains unprotected?
What happens if the deposits from surface corrosion are not removed and the surface remains unprotected?
What is the main purpose of using cadmium as a coating on steel hardware?
What is the main purpose of using cadmium as a coating on steel hardware?
How can you identify corrosion on a cadmium-plated surface?
How can you identify corrosion on a cadmium-plated surface?
Why is chromium used as a protective plating on parts?
Why is chromium used as a protective plating on parts?
In what way does cadmium protect steel when they are coupled together?
In what way does cadmium protect steel when they are coupled together?
What could be a consequence if a chromium-plated part shows cracks in the coating?
What could be a consequence if a chromium-plated part shows cracks in the coating?
Which material is anodic when coupled with steel, providing protection through galvanic action?
Which material is anodic when coupled with steel, providing protection through galvanic action?
What is the reason behind the dull grey-green discoloration seen on copper or copper alloy surfaces?
What is the reason behind the dull grey-green discoloration seen on copper or copper alloy surfaces?
In what applications does silver tarnish, producing a brown-to-black film of silver sulphide?
In what applications does silver tarnish, producing a brown-to-black film of silver sulphide?
Which metal is traditionally regarded as the best coating for corrosion resistance and solderability?
Which metal is traditionally regarded as the best coating for corrosion resistance and solderability?
What accelerates the corrosion of copper when silver is plated over it?
What accelerates the corrosion of copper when silver is plated over it?
What happens when silver is plated over copper in the presence of pinholes or breaks in the plating?
What happens when silver is plated over copper in the presence of pinholes or breaks in the plating?
What is the cause of the tarnish seen on silver surfaces in the presence of sulphur?
What is the cause of the tarnish seen on silver surfaces in the presence of sulphur?
What is the primary reason for scum formation along the edge of a seal in an integral fuel tank?
What is the primary reason for scum formation along the edge of a seal in an integral fuel tank?
Why are aluminium and its alloys widely used in aircraft construction?
Why are aluminium and its alloys widely used in aircraft construction?
What is a common issue faced by aluminium alloys when exposed to certain conditions?
What is a common issue faced by aluminium alloys when exposed to certain conditions?
Why does galvanic corrosion occur when aluminium comes into contact with other metals?
Why does galvanic corrosion occur when aluminium comes into contact with other metals?
What is the role of the oxide film formed on aluminium under mild corrosive conditions?
What is the role of the oxide film formed on aluminium under mild corrosive conditions?
In what way does fungus growth in a fuel tank relate to the corrosion characteristics of aircraft metals?
In what way does fungus growth in a fuel tank relate to the corrosion characteristics of aircraft metals?
Why is tarnish removal critical on gold components?
Why is tarnish removal critical on gold components?
What effect does gold plating over silver or copper have on the less noble metals?
What effect does gold plating over silver or copper have on the less noble metals?
What is the 'purple plague' mentioned in the text?
What is the 'purple plague' mentioned in the text?
Why is tin commonly used in solder applications?
Why is tin commonly used in solder applications?
What issue arises from the growth of 'whiskers' on tin-plated wire?
What issue arises from the growth of 'whiskers' on tin-plated wire?
What is the main advantage of tin plating on avionic RF shields and filters?
What is the main advantage of tin plating on avionic RF shields and filters?
