what is corrosion

engineering quiz 1

Flashcard
•
Engineering
•
12th Grade
•
Hard
Aarini Dudam
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9 questions
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1.
FLASHCARD QUESTION
Front
Back
1) destruction or deterioration of a material because of reaction with its
environments.
2.
FLASHCARD QUESTION
Front
why does corrosion happen?
Back
metals corrode when they exist in chemically unstable environments
3.
FLASHCARD QUESTION
Front
oxidization
Back
they tend to lose electrons to oxygen (and other substances) in the air or in water. as oxygen is reduced (gains electrons), it forms an oxide with the metal.
4.
FLASHCARD QUESTION
Front
dry corrosion
Back
from exposure to oxygen in the atmosphere
metal + oxygen -> metal oxide
5.
FLASHCARD QUESTION
Front
wet corrosion
Back
from exposure to
environments with the presence of water. e.g. sea water, river water, from exposure to environments such as sea water, river water, damp atmosphere
6.
FLASHCARD QUESTION
Front
stress corrosion
Back
the combined effect of stresses set up within the metal from a variety of sources and a corrosive environment
7.
FLASHCARD QUESTION
Front
galvanised
Back
involves covering an iron surface with a thin layer of a more reactive metal.
8.
FLASHCARD QUESTION
Front
sacrificial anodes
Back
highly active metals that are used to prevent a less active material surface from corroding.
the sacrificial anode will be consumed in place of the metal it is protecting.
9.
FLASHCARD QUESTION
Front
coatings
Back
non-metal substances that are added as a protective layer to the underlying metal.
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