Methods for forming white anodized films by metal complex infusion

摘要

The embodiments described herein relate to anodizing and anodized films. The methods described can be used to form opaque and white anodized films on a substrate. In some embodiments, the methods involve forming anodized films having branched pore structures. The branched pore structure provides a light scattering medium for incident visible light, imparting an opaque and white appearance to the anodized film. In some embodiments, the methods involve infusing metal complex ions within pores of an anodized. Once within the pores, the metal complex ions undergo a chemical change forming metal oxide particles. The metal oxide particles provide a light scattering medium for incident visible light, imparting an opaque and white appearance to the anodized film. In some embodiments, aspects of the methods for creating irregular or branched pores and methods for infusing metal complex ions within pores are combined.

主权项

1. A method for providing a white appearance to an anodic film, the anodic film comprising anodic pores with pore openings at an external surface of the anodic film, the method comprising:
widening the anodic pores in a first electrolyte; infusing titanium oxide complex anions into the anodic pores in a second electrolyte, wherein the titanium oxide complex anions migrate toward pore terminuses of the anodic pores positioned opposite the pore openings, wherein at least a portion of the infused titanium oxide complex anions are converted into titanium oxide particles at the pore terminuses.