Flashcards
Corrosion ✔
Flashcards do conjunto (11)
- 1What are the things that make iron rust? (2)-water
-air (oxygen, specifically) - 2What is steel made from?It is mostly made from iron.
- 3Describe two changes to iron caused by rusting.-It changes colour
-It loses it strength - 4True or False? Rusting is used to refer to all types of metals corroding.False.
Rusting is used only towards iron corroding. - 5Give examples of metals which resist corrosion.-Gold
-Silver
-Platinum
-Copper
-Lead - 6Why doesn't aluminium corrode?Aluminium is a special case.
It reacts quickly to the oxygen in the air to form aluminium oxide which protects the metal underneath from further corrosion. - 7What does alloyed mean?When a metal is mixed with other metal/s.
- 8What is stainless steel made from?-Iron
-Chromium
-Nickel
-This is an example of an alloyed metal. - 9How can you stop iron from rusting?-it can be painted
-covered in plastic
-covered in oil or grease
-galvanising - 10What is galvanising?Galvanising is when iron or steel is coated with zinc to stop the iron underneath from corroding.
The zinc coating excludes oxygen and water. - 11What is anodising?Anodising is when aluminium is placed in a special electrical cell that produces oxygen.