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Soldering

Soldering image
Parent Issue
Day
14
Month
January
Year
1876
Copyright
Public Domain
OCR Text

Solders must be selected in ref erence to tlieir appropriate metal. Thus tin plates are soldered with alloy consisting of from one to two parta tin, with one of lead ; pewter is soldered with a more fusible alloy containining a oertain proportion of bismuth, added to the lead and tin ; iron, copper, and brass are soldered with spelter, an alloy of zinc and copper in nearly equal parts ; silver is soldered, sometimes with pure tin, but generally with silver-solder, and also with oue of ïve parts of silver, six of brass, and two of zinc ; zinc and lead are soldered with an alloy of from one to two parts of lead with one of tin : platinum, with fine gold with an alloy of silver and gold, or of copper and gold, etc. In all soldering jrocesses, the following conditions must )e öbserved : The surfaces to be united mnst be entirely free from oxide, bright, smooth, and level ; the contact of air nust be excluded during the soldering, )ecause it is apt-to oxidize one or other of the surfaces, and thus prevent the ormation of an alloy at the point of union . Fhis exclusión of air is effected in vaious ways. The locksmith encases in oam the objects of iron, or brass, that ie wishes to subject to a soldering heat ; he silversmit-h and brazier mix their resxective Bolders with moistened borax wwder ; the coppersmith and tinman ipplysal ammoniac, rosin, or both, to he cleaned metallic Burface, before usng the soldering iron to f use them together with the tin alloy.

Article

Subjects
Old News
Michigan Argus