| 摘要 |
The invention relates to a galvanic bath, to a method for precipitating chromium onto objects using said galvanic bath, and to the use of this metho d for producing structured hard chromium layers on machine parts. The galvanic bath contains at least one compound which provides chromium (VI) ions, in an aqueous solution, and comprises a) a quantity of chromium (VI) ions corresponding to 100 to 600 g/l chromic acid anhydride, b) sulphate ions in the form of sulphuric acid and/or a soluble salt thereof, the molar concentration ratio of chromium (VI) ions to sulphate ions (SO42-) being 90: 1 to 120:1 and c) a quantity of 2-hydroxyethane sulphonate ions corresponding to 0.01 to 3.0 g/l of the sodium salt. |
