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International Journal of Corrosion
Volume 2014, Article ID 703806, 8 pages
http://dx.doi.org/10.1155/2014/703806
Research Article

Parameter Studies on High-Velocity Oxy-Fuel Spraying of CoNiCrAlY Coatings Used in the Aeronautical Industry

1Facultad de Ingeniería Mecánica y Eléctrica (FIME), Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Universidad Autónoma de Nuevo León (UANL), Aeropuerto Internacional del Norte, Carr. Salinas Victoria Km. 2.3, 66600 Apodaca, NL, Mexico
2Centro de Tecnología Avanzada (CIATEQ, A.C.), Procesos de Manufactura, Avenida Manantiales 23-A, Parque Industrial Bernardo Quintana, 76246 El Marqués, Qro, Mexico

Received 18 October 2013; Accepted 11 January 2014; Published 6 March 2014

Academic Editor: Patricia Zambrano

Copyright © 2014 J. A. Cabral-Miramontes et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The thermal spraying process is a surface treatment which does not adversely affect the base metal on which it is performed. The coatings obtained by HVOF thermal spray are employed in aeronautics, aerospace, and power generation industries. Alloys and coatings designed to resist oxidizing environments at high temperatures should be able to develop a surface oxide layer, which is thermodynamically stable, slowly growing, and adherent. MCrAlY type (M = Co, Ni or combination of both) coatings are used in wear and corrosion applications but also provide protection against high temperature oxidation and corrosion attack in molten salts. In this investigation, CoNiCrAlY coatings were produced employing a HVOF DJH 2700 gun. The work presented here focuses on the influences of process parameters of a gas-drive HVOF system on the microstructure, adherence, wear, and oxygen content of CoNiCrAlY. The results showed that spray distance significantly affects the properties of CoNiCrAlY coatings.