2.35 describe how the rusting of iron may be prevented by grease, oil, paint, plastic and galvanising

The effects of rusting can be prevented by:

  • Grease
  • Oil
  • Paint
  • Plastic
  • Galvanising
  • Sacrificial protection

These measures prevent rusting because it stops air/water from coming into contact with iron

Galvanising – The act of placing a more reactive metal (eg. zinc or magnesium) infront of the iron – for example

  1. Zinc – is more reactive than iron
  2. The zinc wil react first, effectively protecting the iron from reacting with thte air or moisture
  3. However, once the zinc has fully reacted, it will need to be replaced because the metal is once more, exposed.

 

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s