Experiment: Investigating the corrosion of iron

////Experiment: Investigating the corrosion of iron

Experiment: Investigating the corrosion of iron

Rusting iron nails. Image credit corrosionist.com

Rusting iron nails. Image credit corrosionist.com

ZIMSEC O Level Combined Science Notes: Experiment: Investigating the corrosion of plated of plated iron

Aim: To investigate the corrosion of  iron

Materials: ferroxyl indicator (turns blue when iron rusts), iron nails, sand paper, magnesium ribbon, zinc, copper, five test tubes, paint

Method

  1. Place ferroxyl indicator to a depth of about 5cm in five test tubes
  2. Clean the nails with sand paper
  3. Place an iron nail in one of the test tubes
  4. Wrap a small piece of magnesium closely around the top of a clean nail and place it in another test tube
  5. Repeat with two more nails wrapping them with zinc and copper instead
  6. Paint one nail with nail vanish or paint before dipping them into the solution
  7. Observe the results

Observation and results

  • The nail in step 3 and the one wrapped in copper rusts  and the ferroxyl indicator turns blue to indicate rusting
  • Zinc and Magnesium protect the iron nail from rusting via sacrificial corrosion even when only part of the nail is wrapped
  • The unwrapped nail and the one wrapped in copper are corroded

To access more topics go to the Combined Science Notes page.

By |2017-01-17T11:13:29+00:00May 5th, 2016|Notes, O Level Science Notes, Ordinary Level Notes|Comments Off on Experiment: Investigating the corrosion of iron

About the Author:

He holds an Honours in Accountancy degree from the University of Zimbabwe. He is passionate about technology and its practical application in today's world.
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