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Blue Chromate Conversion Coating – Chromium(III) Blue Passivation for Zinc & Zinc-Plated Parts

Product information "Blue Chromate Conversion Coating – Chromium(III) Blue Passivation for Zinc & Zinc-Plated Parts"

Blue Chromate Conversion Coating – Chromium(III) Blue Passivation for Zinc & Zinc-Plated Parts

Professional Blue Passivation for Zinc – Superior Corrosion Protection with an Elegant Bluish Finish

The 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.


Applications

The Blue Passivation is ideal for:

  • Zinc-plated components

  • Zinc surfaces

  • Screws

  • Nuts

  • Washers

  • Fasteners

  • Brackets

  • Sheet metal parts

  • Automotive components

  • Classic car restoration

  • Motorcycle restoration

  • Mechanical engineering components

  • Industrial parts

  • Model engineering

  • Decorative metal finishing

Suitable for:

  • Electroplating companies

  • Metal fabrication workshops

  • Restoration specialists

  • Classic car workshops

  • Industrial users

  • Professional workshops

  • Hobby users


Product Benefits

  • Excellent corrosion protection

  • Durable chemical conversion coating

  • Chromium(III)-based technology

  • Completely free of Chromium(VI)

  • Easy immersion process

  • No power supply required

  • No electrodes required

  • Ready-to-use solution

  • Characteristic light bluish finish

  • Excellent underfilm corrosion resistance

  • Ideal as a post-treatment after zinc plating

  • Suitable for professional and hobby applications


How It Works

The 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 Notes

During 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 Materials

The Blue Passivation is suitable for:

  • Zinc-plated steel

  • Electroplated zinc coatings

  • Zinc surfaces

  • Aluminium (depending on alloy and surface preparation)

For best results, the workpiece should be clean, grease-free, and freshly zinc plated before treatment.


Typical Applications

Frequently used for:

  • Corrosion protection of screws and fasteners

  • Automotive restoration

  • Classic car restoration

  • Motorcycle restoration

  • Mechanical engineering

  • Metal fabrication

  • Industrial components

  • Spare parts

  • Model engineering

  • Decorative metal finishing


Available Versions

  • Ready-to-use Blue Chromate Conversion Coating / Blue Passivation

  • Available in various container sizes


Quality from Betzmann Galvanik

Betzmann 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.

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