5340692
Description
Flashcards by Farha Idrees, updated more than 1 year ago
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Created by Farha Idrees
about 8 years ago
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| Question | Answer |
| What are the things that make iron rust? (2) | -water -air (oxygen, specifically) |
| What is steel made from? | It is mostly made from iron. |
| Describe two changes to iron caused by rusting. | -It changes colour -It loses it strength |
| True or False? Rusting is used to refer to all types of metals corroding. | False. Rusting is used only towards iron corroding. |
| Give examples of metals which resist corrosion. | -Gold -Silver -Platinum -Copper -Lead |
| Why 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. |
| What does alloyed mean? | When a metal is mixed with other metal/s. |
| What is stainless steel made from? | -Iron -Chromium -Nickel -This is an example of an alloyed metal. |
| How can you stop iron from rusting? | -it can be painted -covered in plastic -covered in oil or grease -galvanising |
| What 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. |
| What is anodising? | Anodising is when aluminium is placed in a special electrical cell that produces oxygen. |
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