LI-9 corrosion Flashcards
1
Q
what is corrosion?
A
corrosion oxides a metal by reaction with the air and water and they turn into metal oxides
2
Q
what is a metal oxides
A
many metals are slowly replaced by metal oxides overtime, creating rusts, tarnishes and verdigris.
3
Q
corrosion formula
A
iron +oxygen= iron oxide (rust)
4
Q
what is rust?
A
an orange flaky coating that develops on iron and steal overtime.
5
Q
how can the corrosion process be sped up?
A
by the presence of water and salt
6
Q
sacrificial metals (galvanized)
A
sacrificial metals are used to prevent other metals for corroding eg: zinc oxide
