Publication Laka-library:
Development of an environmentally friendly protective coating for the DU –0.75 wt % titanium alloy –Part 2: Coating information and evaluation
| Author | Roeper, Chidambaram, Clayton |
 |
6-05-0-00-28.pdf |
| Date | May 2005 |
| Classification | 6.05.0.00/28 (DEPLETED URANIUM - GENERAL (F.I. HEALTH CONSEQUENCES)) |
| Front | 
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From the publication:
Electrochimica Acta xxx (2005) xxx–xxx
Development of an environmentally friendly protective coating
for the depleted uranium–0.75 wt.% titanium alloy
Part II: Coating formation and evaluation
Donald F. Roeper a,∗ , Devicharan Chidambaram b,1 , Clive R. Clayton a , Gary P. Halada a
a Department of Materials Science and Engineering, Stony Brook University, Stony Brook, NY 11794-2275, USA
b Department of Environmental Sciences, Brookhaven National Laboratory, Upton, NY 11973-5000, USA
Received 31 March 2005; received in revised form 5 May 2005; accepted 7 May 2005
Abstract
Molybdenum oxide based coatings have been formed on the surface of the depleted uranium–0.75 wt.% titanium alloy. Surface activation
prior to coating formation has been examined using fluorides and concentrated nitric acid. The electrochemical characteristics of the coating
formation processes were studied using open circuit potential measurements. Residual fluoride from the activation process has been found to
interfere with coating formation and surface activation by nitric acid yields a relatively thinner but more robust coating.
The corrosion protection characteristics of the coatings were evaluated by potentiodynamic polarization testing in quiescent 0.05 M sodium
chloride. The coatings have been studied using scanning electron microscopy, energy dispersive spectroscopy and optical microscopy.
© 2005 Elsevier Ltd. All rights reserved.
Keywords: Uranium alloys; Corrosion; Molybdate coatings; Electrochemistry; SEM
1. Introduction Previous work in this laboratory [6,7] has shown that
electrochemical activation of the alloy in an acidic sodium
Dep