Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/80212
Type: Artigo de periódico
Title: Influence of microstructure on the corrosion behavior of nitrocarburized AISI H13 tool steel obtained by pulsed DC plasma
Author: Basso, RLO
Candal, RJ
Figueroa, CA
Wisnivesky, D
Alvarez, F
Abstract: The influence of microstructure on the corrosion behavior of pulsed plasma nitrocarburized AISI H13 tool steel in NaCl 0.9 wt/V % solution is reported. The samples were prepared with different nitrocarburizing treatment times using a constant [CH(4)/H(2)+N(2)] gaseous mixture by a DC pulsed plasma system. The microstructure of the nitrocarburized layers was analyzed by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and X-ray diffraction. The corrosion behavior was evaluated by potentiodynamic polarization experiments. The nitrocarburizing process considerably improves the corrosion resistance of the material in a NaCl environment as compared to the untreated H13 steel. The modified surface layer mainly consisting of epsilon-Fe(2-3)(C,N) and gamma'-Fe(4)N phases confers this outstanding behavior. The corrosion resistance dependence on specific nitrocarburizing processes is reported and the role of the surface porosity is discussed. (c) 2008 Elsevier B.V. All rights reserved.
Subject: Plasma nitrocarburizing
Steel corrosion
Tool steel
X-ray diffraction
Surface porosity
Porosity analysis
Country: Suíça
Editor: Elsevier Science Sa
Rights: fechado
Identifier DOI: 10.1016/j.surfcoat.2008.10.006
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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