which metals can rust
only iron, rusting is what corrosion is called for iron, for other metals it is just corrosion
What is stainless steel
An alloy of iron and Nickel which resists corrosion, it is use for making cutlery
What sort of reaction is rusting
Oxidation
Name three allotropes of carbon
Graphite, Graphene, diamond, fullerenes
What is corrosion
chemical reactions between metals and substances in the enviroment which damages the metal
Name two alloys of copper
Bronze and Brass
what is corrosion of iron called
Rusting
What is steel
An alloy of iron and carbon
What was phase 1 of the earth’s atmosphere
Lots of volcanoes, producing steam and carbon dioxide, atmosphere almost all carbon dioxide, then the earth cooled and the vapour condensed to form oceans
Name three barrier methods to present rust
Paint, Oil or grease, plastic coating
What is graphene used for
Electronics and it can be added to other materials to give them stength (composites)
What are fullerenes
molecues of carbon attoms which hollow shapes
Name uses for Bronze
Statues and ships propellers
Name two allotropes of Carbon have dissasociated electrons
Graphite and Graphene
name two types of steel
High carbon Steel (0.22-2.5% carbon) and low carbon steel (0.1-0.3% carbon)
What two features of a metal are affected by corrosion
strenth and appearance
what is the word equation for rusting
IRON + WATER + OXYGEN –> HYDRATED ITON (III) OXIDE
Is 18 catar gold an alloy
Yes it is an alloy og Gold and Copper
Name two uses for brass
Imusical instruments and taps
What was the first fullerene to be discovered
Buckminsterfullerene (C60)
what are the two methods to prevent rust
barrier and sacraficial protection
What was phase 2 of the earth’s atmosphere
plants and algae grow in the oceans, converted carbon dioxide to Oxygen (photosynthesis), Nitrogen produced by bacteria, plants move to the lans Oxggen levels increase
Does NaCL (aq) (i.e. salt water) act as a catalyst for rusting
Yes
Why is there a lot og Nitorgen in the atmosphere
Because it is unreactive so it just collects over time
What needs to be present for Iron to Rust
Water and Oxygen
What was phase 3 of the earth’s atmosphere
Oxygen built up allowing complex organisma to evolve, the oxygen created the ozone layer which blocks harmful UV rays, almost no carbon dioxide left
name three metals which can be used to sacraficially protect iron
Zinc, Magnesium, Aluminium
How does sacraficial protection for rusting work
A more reactive metal is placed near the iron and gets oxidised instead