🛡️ Chromate Conversion Coating – High‑Performance Aluminium Corrosion Protection

Chromate conversion coating (also known as Alocrom, Alodine, or Iridite) is a highly effective chemical treatment used to enhance the corrosion resistance, conductivity, and paint adhesion of aluminium components. As one of the most widely used aluminium finishing processes, chromate conversion provides a reliable protective layer without affecting the dimensional accuracy of precision‑engineered parts.

⭐ Key Benefits of Chromate Conversion

• Outstanding Corrosion Resistance Forms a durable chemical film that protects aluminium from oxidation and harsh environments.
• Excellent Paint & Powder‑Coat Adhesion Ideal as a pre‑treatment for painting, powder coating, and adhesive bonding, ensuring long‑lasting coating performance.
• Maintains Electrical Conductivity Unlike anodising, chromate coatings remain conductive, making them suitable for electrical and aerospace applications.
• Minimal Dimensional Change The ultra‑thin coating preserves tight tolerances, perfect for precision‑machined components.
• Clear or Yellow Finishes Available Different formulations allow compliance with industry standards and customer specifications.

⚙️ Common Applications

Chromate conversion coating is widely used across industries such as:

• Aerospace and defence
• Automotive and motorsport
• Electronics and electrical housings
• Marine and offshore equipment
• Precision engineering and machined aluminium parts
• Components requiring paint or powder‑coat pre‑treatment

🧪 How the Chromate Conversion Process Works

Aluminium components are immersed in a chromate‑based solution, triggering a controlled chemical reaction that forms a protective, corrosion‑resistant film on the surface. This coating becomes part of the metal, offering long‑lasting protection while maintaining conductivity. The finish can be left as‑is or used as a base layer for further coating processes.