Publicatie Laka-bibliotheek:
Development of an environmentally friendly protective coating for the DU –0.75 wt % titanium alloy –Part 2: Coating information and evaluation
Auteur | Roeper, Chidambaram, Clayton |
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6-05-0-00-28.pdf |
Datum | mei 2005 |
Classificatie | 6.05.0.00/28 (VERARMD URANIUM - ALGEMEEN (oa. Gezondheidsonderzoek)) |
Voorkant | ![]() |
Uit de publicatie:
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