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Irridite / Alodine

Irridite is a chemical process that produces a protective chromate conversion film on aluminum and aluminum alloys. The application process is by dip/immersion producing a coating ranging from Clear to Dark Yellow. The process is RoHS (Clear Irridite/Surtech 650).

Specifications: MIL-DTL-5541F, PPS 6.2.1, ASTM B449,or as specified by clients with specific requirements.

Materials that can be zinc plated : Aluminum and Al alloys.

MIL-DTL-5541F

Class 1A Max Corrosion Protect
Class 3 Low Electrical Resistance
Type 1 Hexavalent(Yellow)
Type 2 Trivalent(Clear) ROHS

PPS 6.2.1

Type 2 Trivalent (Clear) ROHS
Class 1A Max Corrosion Protect
Class 3 Low Electrical Resistance

Zinc Plating.

Zinc plating involves the electro-deposition of a thin coating of zinc metal onto the surface of another metal object/base-metal. The zinc coating is a sacrificial that prevents rust from reaching the underlying metal surface. Zinc is chosen because of its innate ability to fight corrosion. Zinc Plating can be Clear (Trivalent), Yellow (Trivalent and Hexavalent) and Black. Parts can be baked to avoid hydrogen embrittlement. The thickness for zinc plating can vary from 0.0001” to 0.001” or as per our clients’ request. The expertise developed over the years in addition to the technologies used in constant evolution allows Groupe Altech to remain a benchmark for the quality of work and the service offered to customers.

Olive drab Chromate can be done after Zinc Plating at clients’ request.

Specifications: ASTM B633, PPS 6.2.18, ISO 2081, QQ-Z-325 or as specified by clients with specific requirements.

Materials that can be zinc plated: Steel, Brass and Zinc alloy.

ASTM B 633

Type I As Plated
Type II Coloured Chromate 96hrs (ROHS Trivalent/Hexavalent Not ROHS)
Type III Colourless Chromate ROHS 12 hrs
Type IV Phosphate
TypeV Colourless Passivate ROHS 72hrs,clear HP
Type VI Coloured Passivate 120hrs
SC4 Very Severe 0.001″(FE/ZN25)
SC3 Severe0.0005″(FE/ZN12)
SC2 Moderate0.0003″(FE/ZN8)
SC1 Mild 0.0002″(FE/ZN5)