Steel Division

Corrosion protection

Best corrosion protection from production to further processing

Steel optimized against wind and weather. Steel is often found in applications exposed to the most extreme conditions. Like hardly any other material, it is exposed to the force of the elements. With the passivation treatments from voestalpine, the steel is optimally prepared to meet the challenge. 

At voestalpine, a great deal of importance is attached to perfect workability in all common processes.

clearcover® is the environmentally compatible passivation

clearcover® is an environmentally friendly and sustainable passivation system without chromium III or chromium VI and is free from heavy metals such as molybdenum, manganese or cobalt. The additional innovative treatment is applied to hot-dip galvanized (Z, ZM, ZF) or electrogalvanized steel strip and can be supplied in combination with oil or phosphating.

  • High level of environmental compatibility and sustainability 
  • Versatile and multifunctional in its application
  • Transparent
  • Free from CrVI and CrIII
  • Free from heavy metals
  • Very good corrosion protection (transport and storage)
  • Direct paintability without pre-cleaning and pre-treatment
  • Good joinability Spot weldability, adhesive bonding and foam adhesion
  • Resistance to chemicals and solvents (detailed information upon request)
Passivation processes in comparison
Corrosion protection (bright finish)

Direct coatability


Weldability

 


Stack
SST
Constant humidity/corrosive environment test
clear cover—the new chromium-free passivation
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Existing chromium-III passivation
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dryform, the dry forming aid

dryform is a dry forming aid for hot-dip galvanized or electrogalvanized steel strip with excellent forming and good corrosion protection properties. Typical applications are found in the tube and section industry as well as in the household appliance industry.

  • Environmental compatible and sustainable based on 100% chromium-free coating technology
  • Alternative to common corrosion protection and forming oils
  • Significantly improved lubrication and forming properties 
  • Advantages of dry, evenly distributed and transparent surface: No oil redistribution, clean processes (occupational safety)
  • Good corrosion protection (transport and storage)

multiface® is the all-rounder

The multiface® coating is 1 to 2 µm thick and is a multifunctional, almost invisible sealant (thin organic coating = TOC) on hot-dip galvanized steel strip (Z, ZM) with excellent corrosion protection properties and direct powder coating capabilities.

  • High level of environmental compatibility and sustainability
  • Free from CrVI and CrIII
  • Free from heavy metals
  • Reduced down to three process steps
  • Alkaline resistance during processing and application
  • Excellent anti-fingerprint properties
  • Direct powder coating possible
  • Excellent atmospheric corrosion protection (corrosion protection classes C1 and C2, DIN EN ISO 12944-2)
  •  Dry formability
  • Joinability (spot welding and adhesive suitability, foam adhesion)

Direct cost savings through reduced number of process steps (oiling, degreasing, rinsing + drying)

When using steel strip coated with multiface®, the oiled part must not be degreased, rinsed or dried. The direct formability and excellent adhesive properties of the material make it possible to directly powder-coat or adhesive-bond the material after deep-drawing. This substantially reduces the processing costs.

Chromium III passivation is the standard

  • Market-established standard passivation 
  • Corrosion protection for transport and storage
  • Free from CrVI

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