公开(公告)号：US10309029B2

公开(公告)日：2019-06-04

申请号：US15105785

申请日：2014-12-19

Applicant: Dublin Institute of Technology

Inventor： Brendan Duffy ,  Michael Whelan

IPC: C25D5/00 ,  C25D11/00 ,  C25D11/12 ,  C25D11/02 ,  C25D11/04 ,  C25D11/06 ,  C25D11/08 ,  C25D11/16 ,  C25D11/24

Abstract: A method for producing a multi-layer anodic coating on a metal is described. The method comprises the steps of (i) placing the metal in a first electrolytic solution and applying a current to form a first anodic layer having a barrier region; (ii) reducing the applied current to cause a reduction in thickness of the barrier region; and (iii) placing the metal in a second electrolytic solution and applying a current to form a second anodic layer.