Soldering, Brazing and Welding

by Unknown

The Method.

—For satisfactory brazing, thoroughly clean the surfaces to be joined, first with a file and then with emery-cloth, and, if necessary, bind them together with thin iron wire. A flux of borax and water mixed up into a thick paste is smeared round the joint, which should then be warmed to get rid of the moisture. Heat the metal to a white heat, dip the spelter into the borax paste, and apply to the part to be joined, rubbing round the joint until the brass is seen to run, when the heat can be cut off. The work should be almost covered in the asbestos cubes, and the spelter applied all round and not only in one place; failures to unite the parts mostly result from insufficient heat or cleaning of the parts.