UN CO RR EC TE D PR OO F 2 Corrosion of epitaxial Fe ( 0 0 1 ) films studied 3 with CEMS and AFM
نویسنده
چکیده
10 Epitaxial Fe(0 0 1) films of a high crystalline and surface quality, as checked in situ with AES, low energy electron 11 diffraction and STM, were grown on MgO(0 0 1). Such films show an exceptional corrosion resistance remaining me12 tallic for years at the ambient atmosphere, except of 5–10 nm, as found using the conversion electron M€ ossbauer 13 spectroscopy (CEMS). For more systematic corrosion studies, 50 nm iron films were prepared of the Fe isotope. As14 prepared Fe films, exposed to the atmosphere did not show clear morphological and compositional changes, which 15 could be associated with the oxide formation, as checked with contact AFM in air and with CEMS. After exposure of 16 the film to HNO3 or HCl vapors corrosion was observed with AFM. It resulted in two different types of surface 17 modifications. The first one was seen as a homogenous granular layer with the height amplitude of about 15 nm. 18 Corrosion-induced changes of the second type have a localized character resulting in micrometer sized porous pro19 trusions. The corrosion products were identified as c-FeOOH. Controlled oxidation of surface iron layer to epitaxial 20 Fe3O4 passivated the film. 2002 Published by Elsevier Science B.V.
منابع مشابه
UN CO RR EC TE D PR OO F 1 Motivational priming and processing interrupt : Startle re fl ex modulation during
8 Article history: 9 Received 7 September 2009 10 Received in revised form 10 February 2010 11 Accepted 11 February 2010 12 Available online xxxx 1345 16
متن کاملUn Co Rr Ec Te D Pr Oo F 1 Physical and Economic Sustainability of Water : New 2 Approach Using the Case of the Big Lost River , Idaho 3
3 AHMED SAID*, DAVID K. STEVENS and GERALD SEHLKE 4 Department of Civil and Environmental Engineering, University of South Florida, Tampa, FL, USA; 5 2 Civil and Environmental Engineering Department, Utah State University, Logan, UT, USA; 6 3 Integrated Environmental Analysis Department, Idaho National Engineering and Environmental 7 Laboratory, Idaho Falls, Idaho, USA 8 (*author for correspond...
متن کاملMetadata of the chapter that will be visualized online
This paper presents majorization results for PH-generators. Based on the majorization results, bounds on the moments and Laplace-Stieltjes transforms of phase-type distributions are found. Exponential distributions and Coxian distributions are identified to be extremal PH-distributions with respect to all the moments and Laplace-Stieltjes transforms for certain subsets of PH-distributions. UN C...
متن کامل