FIM gumboil (active gumboil of FIM)

One of features of the soldering of metal is rather low temperature of process at which there is no fusion of the processed zones of the connected products as, for example, it occurs when welding. This circumstance makes technology available and not needing use of expensive tools and devices.
At the same time, such specifications are created also by considerable problems for performance of high - quality compound of metals. In particular, solder badly sticks to the surface of metal polluted by films of oxides. On the other hand, heating of the processed edge of metal causes its strengthened oxidation at interaction with air.
Thus, for high - quality connection of metal details by means of the soldering it is necessary not only to clear carefully processed zone, but also to prevent its contact with air oxygen during implementation of works. For performance of these tasks gumboils were also created.
As a rule, they represent mixes from organic and inorganic substances. Depending on features of technology of process of the soldering broad application was found by gumboils in the form of liquid, powder or paste. There are also combined decisions when "stuffing" of the tube made of solder is gumboil filler.
Different metals differently react with oxygen, and therefore the oxidic film at them also differs with thickness and durability. This circumstance caused the necessity in development of rather large number of various gumboils. Successfully coping with clarification of one type of metal, concrete gumboil can be powerless at the soldering of another.
And if the soldering of a usual tin there is nobody today does not cause special problems, then work with copper, silver, platinum or a constantan demands use of special gumboil. Especially for work with these metals active gumboil of FIM was developed. It actively eliminates oxides on a surface of these metals, mainly thanks to the orthophosphoric acid which is its part.
Except it ethyl alcohol and water are a part of gumboil. At the same time percentage ratio of ingredients following. On a share of acid, with a density of 1,7 16 percent are necessary. Another 3,7 percent belong to alcohol. Other volume is occupied by water. Gumboil gains the greatest activity in the working range of temperatures from 290 to 350 degrees.
There is a kind of this gumboil - FIM PET. It in more degree is calculated on the soldering of such complex materials as aluminum and beryllium bronze with use of fusible solders at a working temperature in the range from 150 to 300 degrees.