PFOS has been the subject of intensive worldwide discussions that have included partial legal restrictions in several countries over the past several years. Government regulatory agencies continue to push more stringent controls and restrictions on chromium plating processes and the use of perfluorinated mist suppressants in all world regions.
ENTHONE® PFOS-free Solutions for decorative and hard chrome applications offer surface finishers cost-effective, production-proven, and environmentally-friendly sound solutions that address requirements to eliminate Perfluorinated Octane Sulfonate (PFOS) fume suppressants from plating processes.
ENTHONE PFOS-free Solutions minimize air emissions, while reducing worker exposure to hexavalent chromium. Transitioning from PFOS-containing processes to a more environmentally friendly alternative ensures an uninterrupted chemistry supply and experienced Enthone service.
Enthone PFOS-free Solutions include the following, production-proven mist suppressants.
||Designed to reduce the surface tension of hexavalent chrome solutions with low foam generation. The process is stable at elevated temperatures and can be used to reduce misting in operations such as hard chrome, decorative chrome and anodizing.
|ANKOR® WETTING AGENT FF
||Effectively prevents misting from decorative hexavalent chrome solutions based on formation of a foam blanket. ANKOR FF exhibits good stability providing cost-effective and reliable operation.
|UDIQUE® WETTING AGENT PF2
||A low foaming wetting agent that reduces surface tensions. Designed for use in chromic acid etch solutions found in plating on plastics applications.
Glossary of Terms
PFOS (Perfluorinated Octane Sulfonate)
Traditional chrome surfactants are based on these highly resistant chemical substances. Until recently, PFOS has been widely used in consumer goods such as textiles in large quantities. PFOS is bio accumulative and has been banned in most regions worldwide. The electroplating industry obtained an exemption for its continued use, but replacement is still desirable. Some local authorities have introduced maximum waste water emission values for PFOS, PFOA (Per Fluorinated Octane Acid), or PFT, forcing customers to stop using traditional surfactants, even with the exemption in place.
PFT (Perfluorinated Tenside)
Tenside of any chain length where all hydrogen atoms on the carbon chain are replaced by fluor atoms. The carbon-fluoride link is very strong and prevents oxidation of the substance. Therefore, these substances cannot be degraded by environmental organisms and create a risk as they accumulate in the food chain. PFOS is a C8 PFT.
Partially fluorinated substances. Not all hydrogen atoms have been replaced by a carbon-fluoride bond. At least one carbon atom in the molecule chain has at least one carbon-hydrogen bond remaining. Oxidation can take place making Polyfluorinated Tensides less critical than Perfluorinated Tensides. Still, these tensides are not bio degradable per the 648/2004 EU directive. These substances may become the subject of legal restrictions in the future.
Fluor Free Tenside
Tensides without any carbon-fluoride bonds. These substances can be oxidized. High temperatures and chromic acid concentrations accelerate oxidation.
WAFS (Wetting Agent/Fume Suppressant)
A chemical agent that reduces the surface tension of a plating or polishing tank in order to reduce or suppress fumes or mist.