methods for fabricating a structured hard chrome layer and a coating, structured hard chrome layer, structured hard chrome layer and electrolyte

摘要

"METHODS FOR MANUFACTURING A STRUCTURED HARD CHROME LAYER AND A COATING, STRUCTURED HARD CHROME LAYER, STRUCTURED HARD CHROME LAYER". The present invention relates to a method for fabricating structured hard chromium layer, wherein chromium extracted from an electrolyte is deposited on a workpiece, which contains: (a) compound CR (VI) in an amount corresponding to 50 300 g / l chromic acid anhydride; (b) 0.5 to 10 g / l sulfuric acid; (c) 5 g / 1 to 15/1 aliphatic sulfonic acid of 1 to 6 carbon atoms; whereas the electrolyte contains essentially no compounds selected from ammonium molybdate, alkaline molybdate and alkaline earth molybdate, alkaline and alkaline earth vanadate and ammonium zirconate, and is worked with a current density 12% or less. In addition, a method of fabricating a coating, a structured hard chrome layer, a coating and an electrolyte is indicated.