Passivated Steel Roll Forming Material Guide: Corrosion Protection & Coil Specs

Passivated Steel Roll Forming Material

1. Overview of Passivated Steel in Roll Forming

Passivated steel is a material treated with a chemical process that creates a thin protective layer on the surface to reduce corrosion and oxidation. It is commonly applied to galvanized or coated steels to enhance their durability during storage and handling.

In roll forming, passivated steel is used for roofing panels, cladding systems, structural profiles, and general fabrication, especially where temporary corrosion protection is required.

Compared to untreated steel, passivated steel offers improved resistance to white rust, better storage performance, and cleaner handling.

2. Material Composition & Structure

Passivated steel typically consists of:

Steel base (cold rolled or galvanized steel)
Metallic coating (zinc or aluminum-zinc, if applicable)
Passivation layer (chemical treatment)

Passivation Types

Chromate passivation (traditional)
Chromate-free passivation (environmentally friendly)

3. Available Coil Specifications

Thickness Range

0.3mm – 3.0mm

Coil Width

600mm – 1500mm

Coil Weight

3 tons – 15 tons

Coil ID / OD

ID: 508mm / 610mm
OD: up to 1800mm

4. Mechanical Properties

Typical values:

Yield Strength: 180 – 450 MPa
Tensile Strength: 300 – 600 MPa
Elongation: 20% – 35%
Hardness: 100 – 200 HB

5. Coating Types

Chromate Passivation

Strong corrosion resistance
Traditional method

Chromate-Free Passivation

Environmentally compliant
Widely used in modern applications

Coating Thickness

Very thin layer (micron-level)

6. Surface Finishes

Slightly glossy finish
Smooth metallic surface
Clean and uniform appearance

7. Common Roll Forming Applications

Roofing sheets
Wall cladding
Structural profiles
Purlins and channels
General fabrication

8. Advantages of Passivated Steel

Improved corrosion resistance
Reduced white rust formation
Better storage performance
Cleaner surface compared to oiled steel
Suitable for coated materials

9. Disadvantages / Limitations

Not a permanent corrosion solution
Limited protection in harsh environments
Coating can be damaged during forming
Slightly higher cost than untreated steel
May affect further coating processes

10. Roll Forming Machine Considerations

Roll Tooling

Standard rollers suitable
Clean surfaces required

Speed

10–40 m/min

Lubrication

Not required

Cutting

Standard hydraulic or flying shear

Common Issues

Surface marking
Coating wear during forming
Contamination

11. Common Problems in Production

Passivation layer wear
Surface scratches
White rust if stored improperly
Handling damage
Contamination affecting finish

12. Pricing Guide

Typical global pricing:

Low: $650–$950 per ton
Medium: $950–$1400 per ton
High: $1400–$2000+ per ton

Factors affecting price:

Base material
Passivation type
Thickness
Supplier

13. Comparison with Other Materials

Passivated Steel vs Oil Coated Steel

Passivated = dry protection
Oil coated = oil-based protection

Passivated Steel vs Galvanized Steel

Passivated = surface treatment
Galvanized = metallic coating

Passivated Steel vs Painted Steel

Passivated = temporary protection
Painted = long-term protection

14. Best Industries Using Passivated Steel

Construction
Manufacturing
Roofing and cladding
Industrial fabrication
Export-oriented production

15. How to Choose Passivated Steel

Choose This Material When:

Short-term corrosion protection needed
Clean surface required
Storage and transport conditions matter
Cost-effective protection required

Avoid When:

Long-term outdoor exposure
Heavy corrosion environments
Permanent coating required

16. FAQ Section

What is passivated steel?

Steel treated with a chemical layer to reduce corrosion.

What does passivation do?

It protects against oxidation and white rust.

Is it better than oil coating?

Depends—passivation is cleaner, oil offers stronger temporary protection.

Can it be roll formed?

Yes, widely used in roll forming.

Is it environmentally safe?

Modern chromate-free options are compliant.

17. Machine Matcher Section

We supply roll forming machines for all material types including passivated steel.

Custom-built machines to your profile
New machines built to specification
Global delivery available
UK and USA technical support

Contact:
Machine Matcher
Sales & Technical Team

Quick Specs

Thickness
0.3–3.0mm

Yield Strength
180–450 MPa

Coil Width
600–1500mm

Coil ID
508 / 610mm