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Preventing rusting

Description

In this experiment, students protect iron nails using a variety of methods including painting, greasing and sacrificial protection.

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
preventing-rusting



Apparatus Chemicals

Eye protection

Per demonstration or pair or group of students:

Test-tubes, at least 6 (Note 1)

Test-tube rack

Vaseline

Clingfilm or similar plastic film

Marker pen or labels for test-tubes

Iron nails, at least 6 (Note 2)

Galvanised (zinc coated) nails, 2 (Note 3)

Stainless steel nail, screw or bolt

Copper foil, small piece

Magnesium ribbon, about 2 cm

Zinc foil, small piece

Cleaning solution, dilute sodium carbonate (Note 4)

Dilute hydrochloric acid, 1 M, about 10 cm3

Paint plus a small brush (Note 5)

Oil (Note 6)

For corrosion indicator (Note 7):

Gelatine, 5 g

Potassium hexacyanoferrate(III), 0.2 g

Refer to Health & Safety and Technical notes section below for additional information.

 


 





http://www.corrosion-doctors.org/Experiments/rust-chemistry.htm


In this experiment, students protect iron nails using a variety of methods including painting, greasing and sacrificial protection.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.