Anodizing at Absolute Medical GmbH
Type III anodizing on titanium, often referred to as hard anodizing, is an electrochemical process used to create a thick, hard, and durable oxide layer on the surface of titanium components. This process is commonly employed in applications where high wear resistance, corrosion protection, and enhanced surface properties are essential.
SURFACE CHARACTERISTICS
- Custom colors available upon request
- Layer thickness: 20-100 nm (depending on color)
- Surface roughness (Ra): dependent on the roughness of the product to be anodized (e.g., < 0.05 microns on polished metal surfaces)
BENEFITS OF THE PROCESS
- Easier product identification (e.g., color-coding)
- Aesthetically appealing appearance
PROCESS STEPS
for Type III Anodizing on Titanium:
Surface preparation: The process begins with a thorough cleaning of the titanium surface to remove contaminants such as oil, dirt, or oxide layers. This can be achieved through chemical cleaners, etching, or blasting. A clean surface is essential for the uniform formation of the oxide layer.
Electrolytic oxidation: The cleaned titanium part is placed as the anode in a specialized electrolyte solution while an electrical voltage is applied. The electrolyte may vary depending on specific requirements, but acidic solutions are typically used. Under the applied voltage, ions in the solution react with the titanium surface, creating a thick oxide layer.
Oxide layer formation: Type III anodizing produces a particularly dense and thick oxide layer with high hardness and wear resistance. This layer is chemically stable, offering excellent corrosion protection. The thickness of the layer, typically between 20 and 100 micrometers, can be adjusted by controlling the process duration and voltage.
APPLICATION AREAS
Type III anodizing is ideal for implant components (screws, abutments, closure screws) available in various sizes (e.g., different diameters).