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Making thermite welding electrodes

What if the repair of the garage or in the construction of the fence is required, for example, to weld two steel brackets? And, of course, not possible to use any gas welding or welding. In this case, you can make thermite pencil and use it easily possible to solve the problem.

Termite pencil is a wire segment of ordinary carbon steel, onto which the termite, cool mixed with glue. (Glue is better to take a nitrocellulose - it dries faster). Wire diameter (2-5 mm) depends on how massive welded parts are: they bulkier than the thicker wire is needed. The thermite composition consists of aluminum chips (not silumin!) - 23% (by weight) and iron oxide powder - 77%. The particle size of the aluminum oxide scale and should be about 0.5 mm.

At the end of thermite pencil applied primer - "match head", which consists of potassium chlorate (KClOz) and fine aluminum shavings in a ratio of 2: 1 (by weight), mixed with the glue. The primer is needed to ignite the thermite.

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