7.1.6 Alternative 6: CVD - Chemical Vapor Deposition: Conclusion of technical feasibility: Not an alternative to coatings from chromium trioxide because: High process Temperatures > 800°C not applicable for temperature sensitive substrates as brass Do not fulfill the aesthetic requirements if golden, grey or black CVD coatings do not provide sufficient sealing and corrosion protection of the substrate against hot water steam and cleaning/disinfectants chemicals chemical resistance /corrosion protection Cleaning and Hot steam Substrate disinfectant Biocompatibility Adhesion to Aesthetics/ sterilisation Wear/abrasion compatibility to solutions/ & Nickel Leaching substrate Decorative (change/heat- resistance brass alloys thermal (no toxicity) resistance) disinfection not directly on depending on depending on brass / substrate and black/dark substarte pre-coatings 7.1.7. Alternative 7: DLC - Diamond Like Carbon: Conclusion of technical feasibility: Not an alternative to coatings from chromium trioxide because: Not directly applicable on brass substrates, pre-coating is required Poor adhesion performance on soft substrate materials like brass Black color does not fulfill the aesthetic requirements on bright shiny surfaces Limited sterilization cycles on pre nickel-coated substrates chemical resistance /corrosion protection Cleaning and Hot steam Substrate disinfectant Biocompatibility Adhesion to Aesthetics/ sterilisation Wear/abrasion compatibility to solutions/ & Nickel Leaching substrate Decorative (change/heat- resistance brass alloys thermal (no toxicity) resistance) disinfection not directly on depending on depending on brass / substrate and black/dark subtarte pre-coatings 7.1.8. Alternative 8: Electroless Nickelplating: Conclusion of technical feasibility: Not an alternative to coatings from chromium trioxide because:
7.1.6 Alternative 6: CVD - Chemical Vapor Deposition: Conclusion of technical feasibility: Not an alternative to coatings from chromium trioxide because: High process Temperatures > 800°C not applicable for temperature sensitive substrates as brass Do not fulfill the aesthetic requirements if golden, grey or black CVD coatings do not provide sufficient sealing and corrosion protection of the substrate against hot water steam and cleaning/disinfectants chemicals chemical resistance /corrosion protection Substrate compatibility to brass alloys Cleaning and disinfectant solutions/ thermal disinfection Hot steam sterilisation (change/heat- resistance) Wear/abrasion resistance Adhesion to substrate Aesthetics/ Decorative Biocompatibility & Nickel Leaching (no toxicity) not directly on brass / depending on substarte depending on substrate and pre-coatings black/dark 7.1.7. Alternative 7: DLC - Diamond Like Carbon: Conclusion of technical feasibility: Not an alternative to coatings from chromium trioxide because: Not directly applicable on brass substrates, pre-coating is required Poor adhesion performance on soft substrate materials like brass Black color does not fulfill the aesthetic requirements on bright shiny surfaces Limited sterilization cycles on pre nickel-coated substrates chemical resistance /corrosion protection Substrate compatibility to brass alloys Cleaning and disinfectant solutions/ thermal disinfection Hot steam sterilisation (change/heat- resistance) Wear/abrasion resistance Adhesion to substrate Aesthetics/ Decorative Biocompatibility & Nickel Leaching (no toxicity) not directly on brass / depending on subtarte depending on substrate and pre-coatings black/dark 7.1.8. Alternative 8: Electroless Nickelplating: Conclusion of technical feasibility: Not an alternative to coatings from chromium trioxide because: