Making thermite welding electrodes
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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