| 摘要 |
A method and apparatus for processing an object 4, for example an aluminium aircraft part, the method comprising: performing a first conversion coating process to dispose a first conversion coating 10 onto at least part of a surface of the object 4. The object is then partially masked so that the first conversion coating 10 is disposed on the object 4 and an etching process is performed to remove, from the object 4, an unmasked portion of the first conversion coating 10 while retaining the masked portion of the first conversion coating 10 . A second conversion coating process is completed to dispose a second conversion coating 12 onto a region of the surface of the object 4 from which the unmasked portion of the first conversion coating 10 was removed. A paint layer 14 may then be applied to the second conversion coating 12. The first conversion coating 10 is a chromate conversion layer which is deposited as a part of the chromate coating process. |
