1 Metals in Industry working with metals 2 Iron and Steel In previous work we considered the role of the blast furnace in extracting iron from its ore. 3 Making steel the reactions 1) Mixing oxygen with silicon impurities 2) Decomposition of limestone 3) Adding these products together 4 Titanium Titanium is a strong metal used in planes replacement hip joints bikes etc. Two steps are used in its manufacture Step 1 Convert titanium dioxide (ore) to titanium chloride Step 2 Displace the titanium using sodium or magnesium 5 Aluminium Aluminium is a fairly reactive metal that doesnt corrode due to forming a thin layer of aluminium oxide. This explains why greenhouses dont rust and dont need to be painted. A thicker layer of aluminium oxide can be made artificially. There are two stages 1) Remove the natural layer by placing the aluminium in sodium hydroxide. 2) Use electrolysis on sulphuric acid with the aluminium as the positive electrode. This is called anodising. 6 Electroplating Solution containing silver ions 7 This powerpoint was kindly donated to www.worldofteaching.com http//www.worldofteac hing.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.
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