corrosion

Hypothesis 

Some of the iron nails will rust/corrode. They will corrode in tap water, salty water. They won't corrode in boiled water and oil. won't corrode calcium chloride and bung, won't corrode Vaseline and water, won't corrode painted nail zinc and water  

Aim: To investigate the factors that cause rusting of iron and the number of techniques that may prevent rusting  

Equipment

8 test tubes,2  test tube rack, 2 a bung, 8 iron nails, boiled water, tap water, salty water, Vaseline gel, nail polish, zinc pellets or magnesium, ribbon, salty water, cooking oil, calcium chloride, 

Method ;

label 8 test tubes A1 - D1 A2 - D2,

fill test tubes A2 - D2 with enough water to cover the nail 

test tube A1 bwill have an iron nail and tap water . B1 has a iron nail and salty water. C1 has iron nail with boiled water, oil. D1 will have calcium chloride; sealed  with a bung. A2 has a iron nail. B2 a iron nail covered in Vaseline. C2 a iron nail painted in nail polish. D2 a iron nail with a small piece of magnesium ribbon wrapped around it, or with zinc pellets added to it 

Results

A1: Nothing happened

B1: Rusted the nail well 

C1: Only rusted a little bit  

D1: Nothing happened 

A2: Nothing happened

B2: Nothing happened 

C2: Rusted well 

D2: Nothing happened