Joining processes tin-containing soft solders

1 Soldering. Soldering is one of the metal joining processes which is obtained by melting a lower melting point alloy which will wet or alloy with the joint surface and then freeze in place. 

According to the brazing design, the metals to be joined, etc., several filler materials can be used ranging from pure metals (Cu, Ag, Au) to complex alloys (of Co, Ni, Ag, Au, Mg, Al, etc.). There are several basic brazing processes in torch brazing for 

ALLOYS OF THE ELEMENTS OF THE 15TH GROUP OF THE PERIODIC TABLE 

Nitrogen (N, [He]2s22/ 3), symbol and name after the Greek words vi/rpov stvo— par (nitre forming) because it is a constituent of nitric acid and nitrates. Discovered (1772) by Daniel Rutherford. 

Occurrence. Naturally occurring nitrogen (N2) makes up 78% (by volume) of the earth atmosphere. Nitrogen is relatively unabundant in the crustal rocks. The major minerals are saltpetre (KN03) andNaN03 (Chile saltpetre). 

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