James Timothy Shawcross;Andrew Derek Turner;David Richard Lewis
发明人:
James Timothy Shawcross,Andrew Derek Turner,David Richard Lewis
申请号：
US13701119
公开号：
US08888983B2
申请日:
2011.05.25
申请国别(地区):
US
年份:
2014
代理人:
摘要：
Metal implants (10) are treated by anodising the surface (11, 12) in contact with an electrolyte, and then briefly subjecting the anodised surface to a reversed voltage. During a first anodising stage the surfaces are passivated, while during a subsequent anodising stage pits are formed in the passivating surface layer. Rough portions (15) of the surface, in particular portions produced by plasma spraying of metal powder, are sealed with a watertight cover (20) during at least part of the anodising process. After rinsing, biocidal metal ions are subsequently absorbed into the surface of the implant. This provides the implant with biocidal properties. The use of the cover (20) enables a more uniform geometric distribution of biocidal metal ions to be achieved.
