12345 678910 1112 1314 Calderglen High School What is corrosion? A chemical reaction involving a metal changing from an element to a compound answer.

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Presentation transcript:

Calderglen High School

What is corrosion? A chemical reaction involving a metal changing from an element to a compound answer 1 Calderglen High School

From magnesium to iron answer 2 Magnesium provides iron with sacrificial protection. In which direction do electrons flow? Calderglen High School

Which metal is used to galvanise iron? answer 3 zzzz iiii nnnn cccc Calderglen High School

Which metal RUSTS ? answer 4 iron Calderglen High School

Give an example of how iron can be physically protected. 5 answer Paint, grease, tin-plate, electroplate, galvanising, coat with plastic Paint, grease, tin-plate, electroplate, galvanising, coat with plastic Calderglen High School

How does a physical barrier protect iron against rusting? Barrier to water and air (oxygen) Barrier to water and air (oxygen) answer 6 Calderglen High School

Which iron ion is formed when iron rusts? Fe 2+ Fe 2+ answer 7 Calderglen High School

What name is given to the coating of iron with zinc? galvanising answer 8 Calderglen High School

Chromium plated steel rusts quickly when scratched. Compared to iron is chromium more reactive or less reactive. Less reactive answer 9 Calderglen High School

Why does salt speed up corrosion? Salt is an electrolyte answer 10 Calderglen High School

How does salt and acid rain affect corrosion? Speeds it up answer 11 Calderglen High School

What is the test for Fe 2+ ions? Ferroxyl indicator turns blue answer 12 Calderglen High School

What two conditions are required for rusting to take place? Water and oxygen answer 13 Calderglen High School

What type of reaction takes place when a metal corrodes ? oxidation answer 14 Calderglen High School