Passivation · Process-engineered chemistry

UNIPASS-AL NON CHROMEAluminum Passivation – Chrome Free

EU-Compliant Chrome-Free Passivation Drop-In

120–160 h Salt SprayREACH CompliantRoHSEU ELV

01 / Product brief

EU-Compliant Chrome-Free Passivation Drop-In

Zirconium/titanium-based chromium-free conversion coating for aluminium. Produces a colourless-to-light-blue conversion layer delivering 120–160 hours salt spray while fully meeting REACH, RoHS, and EU ELV requirements. Validated as a direct drop-in replacement for chrome systems.

REACH and EU ELV compliant — allows treated parts to enter European automotive and electronics supply chains without restriction. Drop-in chemistry requires no equipment modification versus existing chrome passivation lines.

02 / Performance

Key process advantages

Product-specific outcomes for production quality, operating control and line performance.

01120–160 h Salt Spray

REACH & EU ELV compliant

Direct access to European OEM supply chains

02REACH Compliant

Zero equipment modification

Drop-in replacement for existing chrome lines

03RoHS

120–160 hours salt spray

Strong corrosion performance without hexavalent chrome

03 / Technical data

Recommended operating window

Final operating conditions should be validated against substrate condition, line configuration and the specified finishing system.

[Zr/Ti COMPLEX · REACH COMPLIANT]

Aluminium · European OEM Supply Chains · Electronics Housing

ParameterRecommended value
Operating Temp25–40°C
pH Range3.5–4.5
Salt Spray Performance120–160 h
Coating ColorColorless to Light Blue
Dwell Time2–5 min

Values are typical guidance. MacroCoats process engineers establish the final bath specification after line trials.

04 / Process position

Where it works in the line

Applied at Stage 6 (Passivate) — converts aluminium to REACH-compliant chromium-free protection film.

  1. 01

    Degrease

    Process stage

  2. 02

    Rinse

    Process stage

  3. 03

    De-rust

    Process stage

  4. 04

    Rinse

    Process stage

  5. 05

    Condition

    Process stage

  6. 06

    Phosphate

    Process stage

  7. 07

    Passivate

    Applied at Stage 6 (Passivate) — converts aluminium to REACH-compliant chromium-free protection film.

  8. 08

    Rinse

    Process stage

  9. 09

    Dry

    Process stage

05 / Applications

Specified for real production demands

Typical applications and substrate conditions for UNIPASS-AL NON CHROME.

Application 01

Automotive aluminium parts for European OEM supply chains

  • Aluminium
Application 02

Consumer electronics housings with REACH compliance requirements

  • European OEM Supply Chains
Application 03

HVAC aluminium components where chrome is restricted

  • Electronics Housing
Application 04

White goods and appliance aluminium panels

  • Aluminium

Technical support

Validate UNIPASS-AL NON CHROME on your line.

Share your substrate, current bath, throughput and finishing system. Our process team will recommend a practical trial window.

Get in Touch

Let's optimise your surface treatment process.

Whether you're scaling a phosphating line, addressing inconsistency across plants, or moving to chromium-free systems — our team is ready to engineer chemistry around your process.