METHOD OF SELECTIVE REMOVAL OF HARD SOLDERING COMPOSITIONS FROM SOLDERED UNITS (ALTERNATIVES) Russian patent published in 2004 - IPC

FIELD: metallurgy.

SUBSTANCE: the invention is dealt with a method of selective removal of compositions for hard soldering or brazing soldering from the base units (the base frame units) and in particular, to a method of selective removal of a nickel alloy for a hard soldering from component part made out of alloys based on nickel. The method provides for up immersing in an electrolyte of a unit containing component parts made out of alloy based on nickel, which are fused by means of a nickel alloy for hard soldering. Then they apply to the indicated electrolyte a potential of a the value, at which they keep the above indicated component parts made out of the alloy based on nickel electrochemically passive and dissolve the indicated hard soldering nickel alloy with its consequent removal from the indicated above component parts. The technical result is decreased contamination of environment and consumption of materials.

EFFECT: the invention ensures a decreased contamination of environment and consumption of materials.

10 cl, 8 dwg, 2 tbl, 2 ex