James Timothy Shawcross,David Richard Lewis,Andrew Derek Turner
申请号：
US14754398
公开号：
US09738980B2
申请日:
2015.06.29
申请国别(地区):
US
年份:
2017
代理人:
摘要：
Metal objects are treated by anodizing (P, SE) the metal object in contact with an acidic solution, and then subjecting the anodized metal object to a reversed voltage (VR). The anodizing is performed in two stages, firstly to passivate (P) with the formation of a surface layer, and secondly to form pits in this surface layer (SE). The second stage (SE) of anodizing is performed at a lower voltage than the first stage (P). After the reversed voltage step (VR) the metal object is then contacted with a biocidal metal-containing solution. Biocidal metal is absorbed into the surface of the metal object, resulting in improved biocidal properties. The lower voltage of the second stage anodizing (SE) results in reduced processing time.
