ELECTROPLATING BATH AND PROCESS OF DEPOSITION OF HARD STRUCTURIZED CHROMIUM LAYERS Russian patent published in 2003 - IPC

Abstract RU 2202005 C2

FIELD: electrodeposition, deposition of chromium on parts of machines. SUBSTANCE: electroplating bath contains aqueous solution which includes at least one compound producing chromium ions (VI) and carrying (a) chromium ions (VI) in amount corresponding to 100.0-600.0 g/l of chromium anhydride; (b) sulfates-ions in the form of sulfuric acid and/or its soluble salt in molar relation of chromium ions (VI) to sulfates-ions (SO2-4

) from 90:1 to 120: 1 and (c) 2-hydroxiethane-sulfonate ions in the amount corresponding to 0.01-0.03 g/l of sodium salt. EFFECT: simplified technology of deposition of hard structurized chromium layers and enhanced uniformity of topography of coat and of roughness factor. 17 cl, 3 dwg

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RU 2 202 005 C2

Authors

Stsamajtat Klaus

Dates

2003-04-10—Published

1999-06-24—Filed