Product Specification
“ROCHELLE COPPER” PLATING PROCESS-1160
ROCHELLE COPPER PLATING PROCESS-1160 IS A CYANIDE COPPER PLATING PROCESS, USED FOR PRODUCTION OF HEAVY SMOOTH COPPER DEPOSITS ON STEEL AND ZINC BASE ALLOY DIECASTINGS, WITHOUT ANODE POLARISATION, AND WITH MINIMUM CHANGE IN CONCENTRATION OF THE FREE CYANIDE CONTENT DURING PLATING OPERATION. THE PROCESS CAN BE USED FOR LIGHT OR HEAVY DEPOSITS IN BARREL AND VAT OPERATION. IT CAN BE MORE SUITABLE WHERE EXCELLENT THROWING POWER OF THE DEPOSITS ARE REQUIRED.
OPERATING CONDITIONS :
PROCESS BARREL/LIGHT HEAVY
ROCHELLE COPPER SALT-1160 150 GM/LITRE 250 GM/LITRE
TEMPERATURE … … ROOM 50-70* C
CATHODE C.D. … … 2 AMP/DM2 4 AMP/DM2
ANODE C.D. … … 2 AMP/DM2 4 AMP/DM2
DENSITY … … 10-12* BE 16-20* BE
VOLTAGE FOR VAT … 3-4 VOLT 3-5 VOLT
VOLTAGE FOR BERREL … 6-9 VOLT 6-9 VOLT
COPPER METAL … … 18-20 GM/LITRE 31-33 GM/LITRE
FREE SODIUM CYANIDE … 6-8 GM/LITRE 10-12 GM/LITRE
ROCHELLE SALT … … 45-48 GM/LITRE 75-78 GM/LITRE
EQUIPMENTS :
PLAIN WELDED STEEL TANKS OR LINED WITH RUBBER ARE USED. M.S. IMMERSION HEATERS OR M.S. STEAM PIPES ARE SUITABLE FOR HEATING THE BATH SOLUTION.
ANODES :
ROLLED OVAL SHAPED COPPER ANODES WITH HIGHEST PURITY ARE SUITABLE.
SOLUTION MAKE-UP :
FILL THE CLEAN TANK WITH 2/3 FULL OF DEIONISED WATER. ADD REQUIRED QUANTITY OF THE SALT-1160 SLOWLY WITH VIGOROUS STIRRING,STIR FURTHER TO GET IT DISSOLVE COMPLETELY. ADD WATER TO FINAL VOLUME AND STIR THE SOLUTION THOROUGHLY. HEAT IT TO WORKING TEMPERATURE AND OPERATE THE BATH.
BATH MAINTENANCE :
REPLENISHMENT ADDITION OF SODIUM CYANIDE AND/ OR ROCHELLE COPPER SALT-1160 SHOULD BE MADE ON VISUAL OBSERVATION OR BY ADOPTING ANALYTICAL MEASURES. 7.5 GM/LITRE OF THE SALT-1160, WHEN ADDED, IT INCREASES 1.0 GM/LITRE OF COPPER METAL AND 0.35 GM/LITRE OF FREE SODIUM CYANIDE. EXTRA ADDITION OF ROCHELLE SALT MAY NOT BE REQUIRED IN NORMAL OPERATION BUT ITS CONTENT WILL BE MAINTAIN BY REGULAR ADDITION OF THE SALT-1160.
WASTE DISPOSAL :
ROCHELLE COPPER PLATING BATH SOLUTION ARE ALKALINE IN NATURE AND CONTAIN SODIUM CYANIDE,AND COPPER METAL. PLEASE NOTE THAT ALL WASTE MATERIALS MUST BE DISCARDED IN ACCORDANCE WITH LOCAL AUTHORITY REGULATIONS. COLLECT THE SPENT SOLUTION IN A SUITABLE TANK. REMOVE COPPER COMPLETELY BY PLATING OUT METHOD USING DUMMY CATHODES. THEN DETOXIFICATION OF CYANIDE IS TO BE FOLLOWED BY USUAL METHOD OF ADDING STABLE BLEACHING POWDER OR SODIUM HYPOCHLORITE SOLUTION OR BY PASSING CHLORINE GAS. TO DESTROY 1
OF SODIUM CYANIDE NORMALLY 5 KG. OF STABLE BLEACHING POWDER OR 5.6 LITRE OF 15 % HYPOCHLORITE OR 1.65 KG. OF CHLORINE GAS IS REQUIRED AT ABOVE 10 PH.