APPLICATION OF ELECTRODIALYSIS FOR THE REGENERATION OF ACID SOLUTIONS.

摘要

FOR THE OBTAINING OF UNIFORM COLOR DARK GRAY TO BLACK COATINGS ON MOLDED PARTS COMPOSED OF ZINC-COPPER ALLOYS, A SOLUTION OF ACIDS OF 60 TO 95% IN VOLUME OF ACID IS USED, 5 TO 40% IN VOLUME OF ACID AND 2.5 TO 10% BY VOLUME OF SULFURIC ACID. TO REGENERATE THIS ACID DISSOLUTION, THE APPLICATION OF THE ELECTROLYSIS PROCEDURE IN WHICH THE DISSOLUTION IS TAKEN THROUGH A DIALYSIS CELL (2) LIMITED BY SELECTIVE PERMEABILITY MEMBRANES (3-4) AND ARRANGED BETWEEN A PART OF THE 5.6).