16 - 18 June 2020
Hard chromium-plating is a galvanic, i.e. electrochemical, process.The electrolyte (consisting of water, chromium anhydride and sulphuric acid) is maintained at a constant temperature of approx. 54 °C in an acidproof-lined tub. Corresponding catalyst salts may be added to the electrolyte, depending on field of application. This allows the gloss, hardness and deposition rate etc. to be influenced.Direct current is used to deposit the chromium from the electrolyte. The vapours produced at the surface of the bath are extracted and cleaned in chromium separators. The cleaned air is discharged into the surrounding air and the recyclate from the washing process is fed back to the baths. The temperature of the electrolyte which is cooled by the water circuit increases as the bath load increases. The energy thus obtained is utilised by means of heat exchangers and mixed with the fresh air.Hartchromwerk Brunner AG:Technical hard chromium-plating using the Durit®-special process: - Mass hard chromium-plating- Heavy hard chromium-plating- Multilayer hard chromium-plating (M-Durit®-special process)- Matt hard chromium-plating- Electrolytic matt hard chromium-plating- Structured surfaces with defined roughness- Satin®-special process- Hydrophile hard chromium-plating- Combined plating (chromium - PTFE) Max. Dimensions- Diameter 3200 mm- Length 12000 mm- Weight 25 t
Welt der Oberfläche
Cylindrical grinding - machining to achieve maximum precision.
Precision grinding achieves both a defined surface quality and compliance with ultra-precise tolerances.
By means of specific heat-treatment, the ductility for chromium-plated workpieces can be influenced. Thanks to external initial heat application, the employment ...