Zinc-iron alloy is used in applications where very good corrosion protection is required. The main user is the automotive industry. The coating provides about three times the protection of pure zinc, i.e. the same corrosion resistance is achieved with one third of the coating thickness.
Pinnoitus Helin’s coating solutions for zinc/iron alloy coating:
- Drum and suspension treatment
- Maximum dimensions of the zinc/iron coated piece: 2000x1000x400
- Iron content in the coating is 0,3-0,7 % (the rest is zinc)
- Corrosion resistance up to 700 h (wr) and 1000 h (rr)
The passive voice:
- black passivation, Cr3+
- Ns. thick film passivation Cr3+
- after-box (sealer)
- All post-processing RoHS compliant.
Standard:
- Metallic coatings – Electroplated coatings of zinc and zinc alloys on iron or steel with supplementary Cr(VI)-free treatment (ISO 19598:2016)
- Electrodeposited zinc alloys with nickel, cobalt or iron (ISO 15726:2009)
Zinc-iron is the most commonly used zinc alloy coating, developed mainly for the automotive industry when a pure zinc coating did not provide sufficient corrosion protection in critical applications. The coating is ideal for dimensionally accurate parts and is evenly distributed across the piece.
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