Inventors:
Hugh M. Privett - Palm Beach Gardens FL
Henry M. Hodgens - Jupiter FL
Assignee:
The United States of America as represented by the Secretary of the Air
Force - Washington DC
International Classification:
H01L 2100
Abstract:
The invention provides method and apparatus for chemical milling of a metal part in a milling solution that reduces hydrogen absorption by the part wherein, the metal part to be milled, which serves as the anode, and a cathode of more noble metal than the anode, are mounted in such solution. Unlike the prior art, the cathode and anode are separated in such solution but electrically connected by a conductor therebetween, which conductor is insulated from the milling solution. Thus anode and cathode are mounted, spaced apart in the milling solution, so that metal dissolves from the anode surface, milling such part while electrons flow from anode to cathode by said conductor so that hydrogen forms at the cathode, removed from the anode part, to reduce hydrogen absorption by such part. The anode part can be of, eg. titanium and the cathode of a more noble metal, eg.