Conduct an experiment: How can we prevent rusting?

Rust Question

Question 1: Why don’t some metals rust?

Some metals rust because some metals absorbs water therefore the oxygen atoms get attracted to the water on the metal. This will cause it to rust.

Question 2: Why does it take some things longer to rust than others?

Some metals take longer to rust because some metals absorbs water and oxygen longer and other don’t take as long. For example bronze, steel and copper rust faster because it absorbs oxygen quicker.

Question 3: Why do some materials rust?

Some materials rust because of a chemical reaction from the water and the oxygen. The reaction is caused by iron being exposed to water and moisture. This is sometimes called ‘Corrosion’. When things rust it becomes flaky and crumbly.
Question 4: What does rust look like?
When something is rusted the exterior of the object looks very rough. It also looks red and very flaky.rust


Question 5: How can rust be prevented?

There are many ways to prevent rust now days. From painting it to oiling it. In usual households people tend to paint there things to prevent it from rusting. For example people paint there car to prevent rusting.

Question 6: What types of metals rust?

There are three main types of metals that rust, bronze, steel and copper. But of course theirs other types of metals which rusts. Like silver which turns blackish when rusted.

Question 7: Does aluminium rust?

Unlike iron and steel, aluminium does not rust or corrode in moist conditions. Its surface is protected by a natural layer of aluminium oxide. This prevents the metal below from coming into contact with air and oxygen.

Question 8: How does rust work?

  Rust is the common name for a very common compound, Iron Oxide.There is a chemical called Fe2O3,Fe2O3 is common because iron combines very readily with oxygen — so readily, in fact, that pure iron is only rarely found in nature.

Fair Test and Rusting experiments

 Aim: To find out if rust can be prevented from paint.


  • Paint brush
  • Red paint
  • 500 ml of salty water
  • 2 beakers
  • 2 large screw


1. Coat one of the screws in red paint with a paint brush and come back when the paint is dried.

2. Fill each beaker with 250ml of salty water.

3. Place the painted screw in one beaker with the salty water and the screw without the paint in the other beaker with the salty water.

4. Come back the next day and see if theirs a difference.

Fair test table:

Independent Variable

Dependent Variable

Controlled Variable


What the large screw is coated in.

The amount of rust that has formed on the large screw. The surface area that is covered is what will be measured.


 Amount of time left in the salt water. Temperature of the salty water.

Amount of light shining on the beaker.

The large screw with nothing on it is placed in salty water.