Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying

ABSTRACT: The morphology, wear and corrosion resistance of bilayer coatings elaborated by flame spraying on AISI SAE 1020 substrates are reported. The first layer (bond coat) is a nickel-base alloy (CPM 1205™), and the second is a compound of ZrO2-36 wt.% of Al2O3 (MetaCeram 25088&#848...

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Autores principales:	Ferrer Pacheco,Martha Yasmid, Vargas Galvis,Fabio, Vera López,Enrique, Moreno Téllez,Carlos Mauricio, Peña Rodríguez,Gabriel
Lenguaje:	English
Publicado:	Universidad de Tarapacá. 2017
Materias:	Flame spraying wear coatings corrosion ZrO2-Al2O3/Ni steel AISI SAE 1020
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052017000400721
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spelling	oai:scielo:S0718-330520170004007212018-01-02Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame sprayingFerrer Pacheco,Martha YasmidVargas Galvis,FabioVera López,EnriqueMoreno Téllez,Carlos MauricioPeña Rodríguez,Gabriel Flame spraying wear coatings corrosion ZrO2-Al2O3/Ni steel AISI SAE 1020 ABSTRACT: The morphology, wear and corrosion resistance of bilayer coatings elaborated by flame spraying on AISI SAE 1020 substrates are reported. The first layer (bond coat) is a nickel-base alloy (CPM 1205™), and the second is a compound of ZrO2-36 wt.% of Al2O3 (MetaCeram 25088™). The ceramic coating was deposited using oxidizing and super oxidizing flames, obtained from the fuel/comburent ratio of 1: 2.8 and 1: 4.3 respectively, at projection distances of 8, 9 and 10cm. The corrosion resistance was evaluated by electrochemical impedance spectroscopy (EIS), wear resistance was analyzed using a tribometer MicroTest in the ball-disc configuration, and the morphology was studied using scanning electron microscopy (SEM). The results showed a varied surface morphology of these coatings and the presence of bimodal areas formed by nanometric unmelted particles surrounded by melted particles. The wear resistance and Vickers microhardness of the ceramic coatings did not vary significantly with changes to the type of flame used and spray distance. By comparing the corrosion resistance of the substrate (AISI SAE 1020) and the coated samples, a significant increase of approximately 27 times was observed for these; moreover, it was reported that for coatings obtained using a super oxidizing flame, resistance to polarization increased with increasing spray distance, and for the oxidizing flame, the opposite behavior was observed. Overall, the results show the versatility of the thermal spray flame technique in forming bilayer coatings of ZrO2-Al2O3/Ni that efficiently protect the surfaces of steel AISI SAE 1020 when exposed to corrosive and erosive environments.info:eu-repo/semantics/openAccessUniversidad de Tarapacá.Ingeniare. Revista chilena de ingeniería v.25 n.4 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052017000400721en10.4067/S0718-33052017000400721
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Flame spraying wear coatings corrosion ZrO2-Al2O3/Ni steel AISI SAE 1020
spellingShingle	Flame spraying wear coatings corrosion ZrO2-Al2O3/Ni steel AISI SAE 1020 Ferrer Pacheco,Martha Yasmid Vargas Galvis,Fabio Vera López,Enrique Moreno Téllez,Carlos Mauricio Peña Rodríguez,Gabriel Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying
description	ABSTRACT: The morphology, wear and corrosion resistance of bilayer coatings elaborated by flame spraying on AISI SAE 1020 substrates are reported. The first layer (bond coat) is a nickel-base alloy (CPM 1205™), and the second is a compound of ZrO2-36 wt.% of Al2O3 (MetaCeram 25088™). The ceramic coating was deposited using oxidizing and super oxidizing flames, obtained from the fuel/comburent ratio of 1: 2.8 and 1: 4.3 respectively, at projection distances of 8, 9 and 10cm. The corrosion resistance was evaluated by electrochemical impedance spectroscopy (EIS), wear resistance was analyzed using a tribometer MicroTest in the ball-disc configuration, and the morphology was studied using scanning electron microscopy (SEM). The results showed a varied surface morphology of these coatings and the presence of bimodal areas formed by nanometric unmelted particles surrounded by melted particles. The wear resistance and Vickers microhardness of the ceramic coatings did not vary significantly with changes to the type of flame used and spray distance. By comparing the corrosion resistance of the substrate (AISI SAE 1020) and the coated samples, a significant increase of approximately 27 times was observed for these; moreover, it was reported that for coatings obtained using a super oxidizing flame, resistance to polarization increased with increasing spray distance, and for the oxidizing flame, the opposite behavior was observed. Overall, the results show the versatility of the thermal spray flame technique in forming bilayer coatings of ZrO2-Al2O3/Ni that efficiently protect the surfaces of steel AISI SAE 1020 when exposed to corrosive and erosive environments.
author	Ferrer Pacheco,Martha Yasmid Vargas Galvis,Fabio Vera López,Enrique Moreno Téllez,Carlos Mauricio Peña Rodríguez,Gabriel
author_facet	Ferrer Pacheco,Martha Yasmid Vargas Galvis,Fabio Vera López,Enrique Moreno Téllez,Carlos Mauricio Peña Rodríguez,Gabriel
author_sort	Ferrer Pacheco,Martha Yasmid
title	Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying
title_short	Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying
title_full	Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying
title_fullStr	Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying
title_full_unstemmed	Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying
title_sort	evaluation of morphology, wear and corrosion resistance of zro 2 -al 2 o 3 /ni coatings deposited on carbon steel substrates with flame spraying
publisher	Universidad de Tarapacá.
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-33052017000400721
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Evaluation of morphology, wear and corrosion resistance of ZrO 2 -Al 2 O 3 /Ni coatings deposited on carbon steel substrates with flame spraying

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