METHOD TO TREAT CONTACT SURFACES OF KNOCK-DOWN ELECTRIC CONTACT JOINT Russian patent published in 2011 - IPC C23C26/02 C23G1/00 H01R24/00 C22C28/00 

FIELD: electricity.

SUBSTANCE: method includes treatment of contact surfaces to remove oxide film, heating of contact surfaces and application of metal coating from gallium alloy by local contact melting. Removal of oxide film is made by chemical treatment of contact surfaces with the first etching solution with its subsequent neutralisation and cleaning of contact surfaces from etching results. Then mechanical cleaning of contact surfaces is carried out by polishing, afterwards contact surfaces are heated, metal coating of gallium alloy is applied in the medium of the second etching solution, and subsequent neutralisation of remains of the second etching solution is carried out.

EFFECT: improved loading capacity of knock-down electric contact joint during transfer of electric energy without change in design of contact joint, while the temperature mode of operation is within the permissible limit.

8 cl, 2 ex