FF-3602 High-Efficiency Hard Anodizing Additive for Aluminum Alloys

1. Characteristics and Scope of Application

FF-3602 is a clear, light-yellow acidic liquid under ambient conditions, designed for sulfuric acid hard anodizing systems. Compared to conventional low-temperature anodizing, it achieves an energy saving of up to 60%. It slows down the dissolution of the oxide film, improves coating thickness uniformity, and exhibits an exceptionally superior hardening effect on aluminum alloys containing high copper or high silicon content. Furthermore, it significantly accelerates film formation speed while remaining minimally affected by fluctuations in anodizing temperature and current density, allowing operation at higher temperatures.

This additive is widely utilized in the hard anodizing of aluminum alloy components for automotive, home appliances, and electronic equipment. Compared to traditional hard anodizing, it increases corrosion resistance by 1–2 times and wear resistance by 2–5 times, enabling the production of exceptionally thick hard oxide coatings.

2. Process Flow

Aluminum Substrate → Degreasing → Water Rinse → Alkaline Etching → Water Rinse → Neutralization (Desmutting) → Water Rinse → Hard Anodizing → Water Rinse → Sealing → Water Rinse

3. Bath Composition and Operating Parameters

When using immersion processing with FF-3602: