Conditions for Iron Corrosion

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 colored 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 experiments:

1	665 936	Immersion tube manometer, after Schiele
1	667 054	Test tube rack, for 12 tubes, 32 mm diam.
1	664 045	Test tubes, Fiolax, 30 x 200 mm, set of 10
1	665 232	Angled tube 90°, 50/50 mm, 8 mm Ø
1	667 261	Rubber stopper, one 7-mm hole, 25...31 mm diam.
1	667 180	Rubber tubing, 1 m x 7 mm diam., DIN 12865
2	300 02	Stand base, V-shaped, small
1	301 28ET2	Stand rod, 45 cm, 10 mm diam., set of 2
2	301 09	Bosshead S
2	666 555	Universal clamp, 0...80 mm
1	664 183	Petri dishes
1	667 0344	Tweezer, blunt, 145 mm
1	664 130	Beaker, Boro 3.3, 250 ml, squat
1	666 767	Hotplate, 1500 W, 180 mm diam.
1	666 962	Double-ended spatula, stainless steel, 150 mm
1	671 8410	Iron wool, 200 g
1	670 8200	Petroleum ether, 90...110 °C, 250 ml
1	309 42	Colouring, red, 10 g
1	672 1200	Glycerin, 99 %, 100 ml

Experiment instructions please click here