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.

Zinc Electrolyte – Reliable Corrosion Protection Through Electroplating The zinc electrolyte is a professional electroplating solution designed for the deposition of protective zinc coatings on metal surfaces. It is suitable for pen plating, brush (tampon) plating, and bath plating, delivering uniform, corrosion-resistant coatings on steel, iron, and copper-based materials. Zinc is one of the most widely used metals in electroplating, specifically applied to protect components from rust, oxidation, and environmental damage. Key Benefits Effective corrosion protection for steel and iron Uniform, bright zinc coatings with good surface finish Mildly acidic, cyanide-free and ammonium-free → easy and safer handling Suitable for all plating methods (pen, brush, bath) Excellent throwing power for complex geometries Ideal for repair work, restoration, and production use Applications Plating of screws, nuts, and metal components Corrosion protection for steel and iron parts Automotive parts and restoration (e.g. classic cars) Mechanical engineering and metalworking Outdoor components (fences, railings, exposed parts) Compatible Plating Methods Pen Plating – localized repair and touch-up Brush / Tampon Plating – flexible use on complex surfaces Bath Plating – uniform coating for batch production Technical Specifications Electrolyte type: mildly acidic Operating temperature: 15 – 60 °C Voltage: Bath plating: 0.5 – 3.5 V Pen / Brush plating: 3 – 7 V Current density: 0.25 – 2 A/dm² Deposition rate: approx. 0.8 µm/min Anodes: zinc or graphite Suitable Base Materials Iron Steel Copper and copper alloys (Note: Aluminum, chromium, or titanium require special pre-treatment.)  Step-by-Step Instructions – How Zinc Plating Works 1. Surface Preparation (Critical Step) Thoroughly clean and degrease the workpiece Remove rust mechanically or chemically Only clean surfaces ensure proper adhesion 2. Setup Workpiece = cathode (negative pole) Anode = zinc or graphite (positive pole) Electrolyte = zinc solution 3. Plating Process Apply direct current Zinc ions migrate to the workpiece Formation of a uniform zinc coating 4. Process Control Reduce current if excessive gas formation occurs Maintain movement during brush plating Keep voltage and temperature stable Why Zinc Is So Effective Zinc acts as a sacrificial metal (anodic protection): It corrodes first and protects the underlying base material. Result: Extended component lifespan Reliable rust protection High resistance to environmental exposure Typical Coating Functions Corrosion protection layer Sacrificial (anodic) protection Base layer for further coatings Functional protective coating Safety Information Avoid contact with skin and eyes Use protective gloves and goggles Ensure proper ventilation Dispose of according to local regulations Conclusion – Essential Electrolyte for Corrosion Protection The zinc electrolyte is one of the most important solutions in electroplating, especially when it comes to durability, corrosion resistance, and cost efficiency. It offers: Reliable rust protection Simple and flexible application Professional results for both beginners and industrial users  Ideal for anyone looking to protect and enhance metal surfaces efficiently and long-term.