CHEMOCHROM bright chrome
Hexavalent and trivalent process
CHEMOCHROM 897 – Hexavalent chrome process
The decorative chrome process CHEMOCHROM 897 is the latest state of the art in hexavalent chrome plating.
CHEMOCHROM 897 offers the following advantages:
- Highest possible throwing power
- Suitable even for room temperature
- Operation with liquid catalysts, thus suitable for all types of chromic acid
- Suitable for low concentrations of chromic acid
- Analytical control is not required, Hull cell tests only.
- Non-sensitive against higher concentrations of trivalent chrome
- Tolerant against chlorine impurities.
- Easily understandable system, easily controllable.
- Easy switching possibility from all systems on the market.
- Low consumption costs.
As hexavalent chrome process CHEMOCHROM 897 is suitable for decorative chrome plating especially for parts of complicated geometrical shape.
The process is characterized by excellent throwing power, especially at temperatures of between 20 und 30 °C, so parts can be fixed tighter and plated at relatively low current densities. Thus surfaces of different dimension, especially in automatic plants, can be plated without modification of rectifier voltage.
CHEMOCHROM DR 1140 – trivalent chrome process (sulphate-based)
CHEMOCHROM DR 1140 deposits decorative chrome layers of coating thickness up to maximum 0.2 μm. It does not contain chromates (chromic acid) but is based on trivalent chrome compounds thus reaching a considerable improvement in the protection of labour and environment. Besides this a separate wastewater line and the reduction of hexavalent chrome during detoxification can be cancelled. CHEMOCHROM DR 1140 is sulphate-based and does not contain ammonium or PFOS (PFT) containing wetting agents. The resulting chrome coatings are light and quite similar to chrome deposits obtained from hexavalent chrome baths.
In terms of throwing power and covering CHEMOCHROM DR 1140 is comparable to conventional chrome baths based on chromic acid. In high current density areas there are no burnings. Auxiliary anodes and screens are even at parts of complicated shape usually not required. Boreholes or other perforations of the parts to be chrome-plated do not have to be closed by stoppers (compared to plating in conventional chrome baths).
CHEMOCHROM CR 3 – trivalent chrome process (chloride-based)
CHEMOCHROM CR 3 deposits decorative chrome layers of light appearance similar to chrome deposits obtained from hexavalent chrome baths. It is based on trivalent chromium compounds and does not contain chromic acid. In terms of throwing power and covering CHEMOCHROM CR 3 outperforms conventional chrome baths based on hexavalent chrome considerably, thus meaning a substantially more regular metal distribution without burnings in high current densities. Auxiliary anodes and screens are even at parts of complicated shape usually not required. Boreholes or other perforations of the parts to be chrome-plated do not have to be closed by stoppers (compared to plating in conventional chrome baths).