Conditions for iron corrosion

Conditions for iron corrosion
Conditions for iron corrosion

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Experiment C1.5.3.1 examines the conditions under which ferrous metals corrode. Wads of iron wool are subjected to different conditions. In one test tube, boiled water is poured over the iron wool, in the second test tube the iron wool is left dry, and the third test tube is rinsed with tap water so that droplets remain in the tube. This test tube is connected to an immersion tube manometer filled with coloured water. The changes in the iron wool and the changes in the immersion tube manometer are observed. It can be seen that under the simultaneous action of water and oxygen on iron, corrosion forms and a measurable negative pressure builds up in the apparatus.

Components of equipment sets

1 665936 Immersion tube manometer, after Schiele LD
1 667054  8  Test tube rack, for 12 tubes, 32 mm diam. LD
1 664045  4  Test tubes, Fiolax, 30 x 200 mm, set of 10 LD
1 665232  8  Angled tube 90°, 50/50 mm, 8 mm Ø LD
1 667261  4  Rubber stopper, one 7-mm hole, 25...31 mm Ø LD
1 667180  4  Rubber tubing Ø 7 mm, t = 1,5 mm, l = 1m LD
2 30002  4  Stand base, V-shaped, small LD
2 30128  8  Stand rod, 450 x 10 Ø mm LD
2 30109  4  Bosshead S LD
2 666555  4  Universal clamp 0...80 mm LD
1 664183  4  Petri dish, 100 x 20 mm, glass LD
1 6670344  4  Tweezer, blunt, 145 mm LD
1 664130  4  Beaker, Boro 3.3, 250 ml, squat LD
1 666767  8  Hotplate, 1500 W, 185 mm Ø LD
1 666962  4  Spatula, double ended, 150 mm LD
1 6718410  4  Iron wool, 200 g LD
1 6708200  4  Petroleum ether, 90...110 °C, 250 ml LD
GHS02GHS07GHS08GHS09 Danger H225 H304 H315 H336 H411
1 30942  4  Colouring, red, 10 g LD
1 6721200  4  Glycerol, 99 %, 100 ml LD
1 additionally required: tap water, mineral water

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C1.5.3.1 Conditions for iron corrosion
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