METHOD FOR PREPARING SURFACES OF CAST IRON PARTS FOR SOLDERING Russian patent published in 2001 - IPC

FIELD: manufacture and restoration of cast iron parts. SUBSTANCE: method comprises steps of removing graphite from soldered surfaces at treating said surfaces by means of electric-spark discharge; using cast iron part as cathode; making anode electrode from copper, nickel or low carbon steel; performing treatment at 20 C; simultaneously with removal of graphite applying onto soldered surface technological coat corresponding to material of anode for improving spreadability of solder and strength of soldered joint. EFFECT: enhanced quality of soldered joint.