Passivation
Passivation is a chemical process in which the surface of a metal is specifically treated to make it more resistant to corrosion. In this process, a thin protective layer forms on the metal, preventing oxygen or moisture from attacking the material.
Proseal
Under the PROSEAL brand, we offer passivation and chromating processes produced from chromium(III) solutions or chromium(VI) salts. They create differently colored, functional surfaces with varying levels of corrosion protection and are suitable for both rack and barrel goods
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Passivation: Zinc, Zinc-Iron and Zinc-Nickel
Zinc is a relatively reactive metal that oxidizes easily. The passivation of zinc, zinc-iron, and zinc-nickel is therefore a crucial step in increasing the corrosion resistance of these electroplated zinc coatings. Through chemical conversion, a protective layer is formed that preserves the metal from oxidation and significantly extends its service life.
Our cobalt-containing PROSEAL XZ series, based on trivalent chromium, offers a range of options for various applications, including fluoride-free formulations. Variants containing hexavalent chromium are also still available.
| Product | Zinc | Zinc-Iron | Zinc-Nickel | Optics | Chromium (VI) | Cobaltfree | Fluoridefree | Applicable for temper process |
|---|---|---|---|---|---|---|---|---|
| PROSEAL XZ 114 | X | blue / iridescent | ||||||
| PROSEAL XZ 115 | X | blue | ||||||
| PROSEAL XZ 135 | X | X | blue/ iridescent | X | ||||
| PROSEAL XZ 140 | X | yellow-red / iridescent | ||||||
| PROSEAL XZ 145 | X | red-green-yellow / iridescent | ||||||
| PROSEAL XZ 160 | X | black | ||||||
| PROSEAL XZ 185 | X | yellow / iridescent | ||||||
| PROSEAL XZ 505 | X | transparent / blue / iridescent | ||||||
| PROSEAL XZ 530 | X | X | blue / yellow iridescent | X | ||||
| PROSEAL U 20 F | X | yellow | X | |||||
| PROSEAL CR Black | X | black | X |
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Cobalt-free passivation for zinc
Traditional passivations often contain cobalt. With our PROSEAL CF series, we also offer cobalt-free passivations that are environmentally friendly and resource-efficient while maintaining equally high protective performance. During passivation, only a small amount of zinc is removed, and hexavalent chromium is also avoided.
| Product | Zinc | Zinc-Iron | Zinc-Nickel | Optics | Chromium (VI) | Cobaltfree | Fluoridefree | Applicable for temper process |
|---|---|---|---|---|---|---|---|---|
| PROSEAL CF 114 | X | blue / iridescent | X | |||||
| PROSEAL CF 115 | X | blue | X | |||||
| PROSEAL CF 140 | X | yellow-red / iridescent | X | |||||
| PROSEAL CF 145 | X | green-yellow-red / iridescent | X | |||||
| PROSEAL CF 560 | X | black | X | |||||
| PROSEAL CFF 210 | X | iridenscent | X | X | X | |||
| PROSEAL CFF 530 | X | X | blue / yellow iridescent | X | X |
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Passivation treatments with a decorative finish
Blue passivation
Blue passivation is the classic among zinc finishes. It produces a chrome-like appearance and provides reliable basic corrosion protection.
| Product | Zinc | Zinc-Iron | Zinc-Nickel | Optics | Chromium (VI) | Cobaltfree | Fluoridefree | Applicable for temper process |
|---|---|---|---|---|---|---|---|---|
| PROSEAL XZ 114 | X | blue / iridescent | ||||||
| PROSEAL XZ 115 | X | blue | ||||||
| PROSEAL XZ 135 | X | X | blue / iridescent | X | ||||
| PROSEAL XZ 505 | X | transparent / blue / iridescent | ||||||
| PROSEAL XZ 530 | X | X | blue / yellow iridescent | X | ||||
| PROSEAL CF 114 | X | blue / iridescent | X | |||||
| PROSEAL CF 115 | X | blue | X | X | ||||
| PROSEAL CFF 530 | X | X | blue / yellow iridescent | X | X |
Black passivation
For a decorative and at the same time functional surface, black passivation is suitable. It is mainly used in the automotive and electronics industries.
| Product | Zinc | Zinc-Iron | Zinc-Nickel | Optics | Chromium (VI) | Cobaltfree | Fluoridefree | Applicable for temper process |
|---|---|---|---|---|---|---|---|---|
| PROSEAL XZ 160 | X | black | ||||||
| PROSEAL CR Schwarz | X | black | X | |||||
| PROSEAL CF 560 | X | X | black | X |
Yellow passivated
Yellow passivation produces a warm, iridescent color tone with high corrosion protection. It is commonly used for fasteners and visible components.
| Produkt | Zinc | Zinc-Iron | Zinc-Nickel | Optics | Chromium (VI) | Cobaltfree | Fluoridefree | Applicable for temper process |
|---|---|---|---|---|---|---|---|---|
| PROSEAL U 20 F | X | yellow | X |
Iridescent passivated
Iridescent passivations offer not only excellent protection but also an attractive play of colors in blue, yellow, and green tones. These surfaces appear high-quality and are in demand across many industrial sectors.
| Product | Zinc | Zinc-Iron | Zinc-Nickel | Optics | Chromium (VI) | Cobaltfree | Fluoridefree | Applicable for temper process |
|---|---|---|---|---|---|---|---|---|
| PROSEAL XZ 114 | X | blue / iridescent | ||||||
| PROSEAL XZ 135 | X | X | blue / iridescent | X | ||||
| PROSEAL XZ 140 | X | yellow-red / iridescent | ||||||
| PROSEAL XZ 145 | X | green-yellow-red / iridescent | ||||||
| PROSEAL XZ 185 | X | yellow / iridescent | ||||||
| PROSEAL XZ 505 | X | transparent / blue / iridescent | ||||||
| PROSEAL XZ 530 | X | X | blue / yellow iridescent | X | ||||
| PROSEAL CF 114 | X | blue / iridescent | X | |||||
| PROSEAL CF 140 | X | yellow-red / iridescent | X | |||||
| PROSEAL CF 145 | X | green-yellow-red / iridescent | X | |||||
| PROSEAL CF 210 | X | iridescent | X | X | X | |||
| PROSEAL CFF 530 | X | X | blue / yellow iridescent | X | X |
Special Additives
| Product | Zinc | Zinc-Iron | Zinc-Nickel | Black | Yellow |
|---|---|---|---|---|---|
| PROSEAL Nanoadditive | X | X | X | ||
| PROSEAL Additive Black | X | X | X | ||
| PROSEAL Additive Y | X | X | X |
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Zinc corrosion protection: passivation with KIESOW PROSEAL
Wherever metal components must be corrosion-resistant, durable, and functional, passivation is used. Discover our solutions for zinc passivation today, tailored to your industry and requirements. Get in touch now!