Electro-Chemical Science of Anodization

Anodization is an electrolytic process that increases the thickness of the natural oxide layer on the surface of metal parts. In piercing, this process is used to both color jewelry and ensure maximum biocompatibility.

Thin-Film Interference

Unlike paint or plating, anodized color is caused by the interference of light waves reflecting off the transparent titanium oxide layer. The color produced is directly related to the voltage applied during the process, which determines the thickness of the layer.

Technical Benefit: Higher voltages produce thicker oxide layers, which create a more robust barrier between the metal and the body, effectively 'passivating' the surface against corrosion.

Technical Specifications

Citations & Industry References

• Electrochemical and Solid-State Letters: Titanium Oxidation
• Bio-Medical Materials and Engineering Reports