Chromatierung Gelb + Blau

Yellow Chromate Conversion Coating – Chromium(III) Yellow Passivation for Zinc & Zinc-Plated PartsProfessional Yellow Passivation for Zinc – Gold-Colored Corrosion Protection without Chromium(VI)The Yellow Chromate Conversion Coating / Yellow Passivation is a premium Chromium(III)-based conversion coating developed to produce an attractive golden yellow to brass-colored protective finish on zinc and zinc-plated components. Besides its decorative appearance, the passivation significantly improves the corrosion resistance of zinc surfaces.Unlike the traditional Chromium(VI) yellow chromate process, this modern formulation is based on Chromium(III) and is completely free of highly toxic Chromium(VI). It offers a safer and more environmentally friendly alternative while achieving a finish that closely resembles the classic yellow chromate coating.The resulting coating produces the characteristic golden-yellow, slightly iridescent appearance traditionally found on vintage automotive hardware, fasteners, and mechanical components, making it especially popular for classic car restoration, motorcycle restoration, engineering, and decorative metal finishing.ApplicationsThe Yellow Passivation is ideal for:Zinc-plated componentsZinc surfacesScrewsNutsWashersFastenersBracketsAutomotive partsClassic car restorationMotorcycle restorationMechanical componentsIndustrial partsModel engineeringDecorative metal finishingSuitable for:Restoration specialistsClassic car workshopsElectroplating companiesMetal fabrication workshopsIndustrial usersProfessional workshopsHobby usersProduct BenefitsAttractive golden yellow to brass-colored finishCharacteristic iridescent appearanceChromium(III)-based technologyCompletely free of Chromium(VI)Improved corrosion protectionSimple immersion processNo power supply requiredNo electrodes requiredReady-to-use solutionUniform conversion coatingDecorative and protective finishIdeal as a final treatment after zinc platingHow It WorksThe Yellow Passivation is applied directly after zinc plating.Simply immerse the clean zinc-plated workpiece into the ready-to-use passivation solution.Within only a few minutes, a decorative Chromium(III) conversion coating forms on the surface.Depending on the immersion time, different color shades can be achieved:Light yellowGolden yellowBrass-coloredSlightly iridescent finishThe color intensity can easily be adjusted by shortening or extending the immersion time.Application NotesDuring the conversion coating process, a small amount of zinc is chemically converted. Therefore, the zinc coating should have a minimum thickness of 2 µm before passivation.Once the desired color has been achieved, remove the workpiece from the solution and rinse thoroughly with distilled water.Allow the coating to dry completely to achieve maximum corrosion resistance and optimum color development.Suitable Base MaterialsThe Yellow Passivation is designed exclusively for:Zinc-plated steelZinc surfacesElectroplated zinc coatingsPreviously blue-passivated zinc componentsFreshly zinc-plated workpiecesPreviously blue-passivated zinc parts can also be converted into an attractive golden-yellow finish.Typical ApplicationsFrequently used for:Classic car restorationVintage motorcycle restorationAutomotive restorationScrews and fastenersMechanical engineeringIndustrial componentsDecorative hardwareModel engineeringReplacement partsMetal finishingAvailable VersionsReady-to-use Yellow Chromate Conversion Coating / Yellow PassivationAvailable in various container sizesQuality from Betzmann GalvanikBetzmann Galvanik supplies professional surface finishing solutions for decorative and industrial electroplating applications. Our Chromium(III) Yellow Passivation delivers an authentic golden-yellow finish with excellent corrosion protection while providing a modern, Chromium(VI)-free alternative for professional metal finishing and restoration projects.

Blue Chromate Conversion Coating – Chromium(III) Blue Passivation for Zinc & Zinc-Plated PartsProfessional Blue Passivation for Zinc – Superior Corrosion Protection with an Elegant Bluish FinishThe Blue Chromate Conversion Coating / Blue Passivation is a premium Chromium(III)-based conversion coating designed as a post-treatment for zinc and zinc-plated components. It forms a durable chemical conversion layer on the zinc surface, significantly improving corrosion resistance and extending the service life of the zinc coating.After treatment, the surface develops the characteristic light bluish tint typical of professional blue chromate conversion coatings, giving zinc-plated parts a clean, high-quality appearance while providing excellent long-term protection against corrosion.Unlike traditional blue chromate processes based on Chromium(VI), this modern formulation is based on Chromium(III) and is completely free of highly toxic Chromium(VI). It offers a safer and more environmentally friendly alternative while maintaining excellent protective properties.The product is supplied ready to use and is applied simply by immersion. No power supply, electrodes, or additional equipment are required.ApplicationsThe Blue Passivation is ideal for:Zinc-plated componentsZinc surfacesScrewsNutsWashersFastenersBracketsSheet metal partsAutomotive componentsClassic car restorationMotorcycle restorationMechanical engineering componentsIndustrial partsModel engineeringDecorative metal finishingSuitable for:Electroplating companiesMetal fabrication workshopsRestoration specialistsClassic car workshopsIndustrial usersProfessional workshopsHobby usersProduct BenefitsExcellent corrosion protectionDurable chemical conversion coatingChromium(III)-based technologyCompletely free of Chromium(VI)Easy immersion processNo power supply requiredNo electrodes requiredReady-to-use solutionCharacteristic light bluish finishExcellent underfilm corrosion resistanceIdeal as a post-treatment after zinc platingSuitable for professional and hobby applicationsHow It WorksThe Blue Passivation is applied immediately after zinc plating.Simply immerse the clean zinc-plated workpiece into the ready-to-use passivation solution.Without applying electrical current, a fine Chromium(III) conversion coating forms within a few minutes, protecting the zinc surface while producing the characteristic light bluish appearance.After treatment, rinse the workpiece thoroughly with distilled water and allow it to dry completely for maximum corrosion resistance and optimum coating performance.Application NotesDuring the conversion coating process, a small portion of the zinc surface is chemically converted. Therefore, the zinc coating should have a minimum thickness of 2 µm before passivation.The Blue Passivation is intended exclusively as a finishing treatment for zinc-plated surfaces.Suitable Base MaterialsThe Blue Passivation is suitable for:Zinc-plated steelElectroplated zinc coatingsZinc surfacesAluminium (depending on alloy and surface preparation)For best results, the workpiece should be clean, grease-free, and freshly zinc plated before treatment.Typical ApplicationsFrequently used for:Corrosion protection of screws and fastenersAutomotive restorationClassic car restorationMotorcycle restorationMechanical engineeringMetal fabricationIndustrial componentsSpare partsModel engineeringDecorative metal finishingAvailable VersionsReady-to-use Blue Chromate Conversion Coating / Blue PassivationAvailable in various container sizesQuality from Betzmann GalvanikBetzmann Galvanik supplies premium electroplating chemicals for professional surface finishing. Our Chromium(III) Blue Passivation provides outstanding corrosion protection, excellent process reliability, and the characteristic bluish appearance of high-quality zinc-plated components. It is the ideal finishing treatment for decorative and industrial zinc coatings.