Tin soldering of aluminum and its alloys Page: 2 of 12
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TIN SOLDERING OF ALUMINUM AND ITS ALLOYS.*
Prof. Gino Gallo.
As is known, aluminum and its alloys can only be welded antog-
enously or by other very special means, with recourse to fusing
and the interposition of alloys with other metals.
Aside from the fact that the autogenous weldings of aluminum
and its alloys have intrinsic defects inherent in their nature,
like blow-holes, blisters, etc., they cause a deterioration of
the mechanical properties of the metal and, in the event of the in-
terposition of other metals, the latter become the seats of elec-
trolytic reactions; with continuous and rapid change, in addition
to the othdr important circumstances that these weldings are only
possible between pieces of the same metal alloy and are therefore
impossible with other metals. Consequently the field of applica-
tion of the light metals is necessarily much restricted.
The author considered the possibility of rendering general
the joining of the light metals, by having recourse to soft sol-
dering with tin, as practiced with all the other metals.
But, as every one knows, aluminum cannot be soldered in this
way, since tin, or the alloy of tin and lead, will not adhere to
* From "Rendiconti dell' Istituto Sperimentale Aeronautico," Febr'-
ary, 1921, pp. 43-50.
A recent article by L Guillet and M. Gasner, published in the
"Revue de Metallurgie," (Vol. XVII, 1920, p. 351) on nickel-plating
aluminum, influenced me to publish the present article on a pro-
cess patented by the author in 1916 and which, in its fundamental
part, was inspired by the same principle as that adopted by the
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Gallo, Gino. Tin soldering of aluminum and its alloys, report, October 1921; (digital.library.unt.edu/ark:/67531/metadc277416/m1/2/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.