Wear and corrosion behaviour of thermally sprayed cermet coatings

Toma, D.; Brandl, W.; Mărginean, Gabriela

doi:10.1016/s0257-8972(00)01141-5

Cited by 218 publications

(88 citation statements)

References 12 publications

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“…Toma et al [48] examined the erosion and corrosion resistance of coatings produced by HVOF spraying at ambient temperatures in 0.1 M NaOH and 0.1 M H 2 SO 4 solutions containing sand. Wear-corrosion tests showed that the corrosion properties of the sprayed coatings strongly affect the material loss rate under wear-corrosion conditions.…”

Section: Thermally Sprayed Coatingsmentioning

confidence: 99%

Tribo-corrosion of coatings: a review

Wood¹

2007

J. Phys. D: Appl. Phys.

224

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This paper reviews the available literature relating to the emerging research into the performance of coatings under combined wear and corrosion conditions. Understanding how coatings perform under these tribo-corrosion conditions is essential if the service life of equipment is to be predicted and to allow service life to be extended. Therefore, the tribo-corrosion performance of coatings deposited by a variety of techniques is discussed and the main mechanisms associated with their degradation under combined wear and corrosion highlighted. Coating composition, microstructure, defect level, adhesion, cohesion and substrate properties are seen as some of the critical elements in coating performance when subjected to tribo-corrosion contacts. The importance of post-coating deposition treatments such as laser resurfacing and sealing are also discussed. Interactions between wear and corrosion mechanisms are identified along with some models and mapping techniques that aim to inform coating selection and predict performance. Recent investigations into mono-layer as well as multilayered and functionally graded coatings are reviewed as candidates for wear-corrosion resistant surfaces. The review reveals the need for a more considered approach to tribo-corrosion testing and the way in which the results are analysed and presented. For example, the test conditions should be appropriate to the coating system under test; the level of in situ instrumentation deployed and the post-test analysis of in situ electrochemical data should be carefully selected as well as details given of the composition of any surface tribofilms formed and the identification of the degradation mechanisms.

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Section: Thermally Sprayed Coatingsmentioning

confidence: 99%

Tribo-corrosion of coatings: a review

Wood¹

2007

J. Phys. D: Appl. Phys.

224

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“…Los recubrimientos pueden ser metálicos, cerámicos, poliméricos o de cualquier combinación deseada para dar un amplio rango de características físicas. Si bien estos métodos de rociado térmico están siendo usados con éxito en el mundo desarrollado, a un no se tiene una completa compresión de los procesos metalúrgicos que tienen lugar durante el rociado térmi-co para los múltiples substratos a los que se aplican estos recubrimientos, dado básicamente a que estos se forman por unión partícula-partícula del metal aportado, resultando una capa superficial cuya estructura es altamente anisotrópica y la evaluación de sus propiedades físicas y mecánicas resulta compleja [40,41].…”

Section: Ventajas Del Rociado Térmicounclassified

La tecnología de recuperación y protección contra el desgaste está en el rociado térmico.

Arévalo

2014

prospect

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La tecnología de recuperación y protección contra el desgaste está en el rociado térmico La tecnología de recuperación y protección contra el desgaste está en el rociado térmicoThe technology against the wearing is the thermal spray RESUMENLos recubrimientos por rociado térmico están ayudando a controlar y disminuir los problemas superficiales que implican desgaste y corrosión. Los recubrimientos por rociado térmico sirven para mejorar características mecá-nicas, físicas y químicas, dando calidades superiores de funcionamiento a la superficie. La variedad de productos y capas que se pueden obtener por rociado térmico, son virtualmente ilimitadas. Las técnicas de rociado térmico son sistemas de combustión por llama, oxi-combustible de alta velocidad, detonación; sistemas de arco eléctrico, plasma con arco transferido y no transferido. Estos procesos son usados con éxito en el mundo desarrollado y vienen incrementando las inversiones industriales en este campo, y también es usado por instituciones de investigación para el desarrollo de nuevas aplicaciones y la evaluación de las propiedades físicas, químicas y mecánicas de estas capas protectoras. La protección y modificación de la superficie y sus propiedades, son una herramienta potente en la ingeniería moderna, en donde las nuevas aplicaciones de la tecnología de rociado térmico son una alternativa técnica, económica y competitiva para la industria. También, permite mejorar la productividad de los procesos, contribuyendo a aumentar la funcionalidad de partes que trabajan bajo condiciones severas de desgaste.Palabras clave: Rociado térmico, Recubrimientos, Desgaste, Corrosión, Ingeniería de superficies. ABSTRACTThermal spray coatings are helping to control and reduce superficial problems involving wear and corrosion. Thermal spray coatings are profitable and serve to improve mechanical, physical and chemical performance giving superior qualities to the surface. The variety of products and layers that can be obtained by thermal spraying is virtually limitless. The techniques of thermal spraying are combustion systems by flame spray, high velocity Oxi-fuel, detonation and electric arc systems, plasma spray with transferred and not transferred arc. These processes are used successfully in the developed world and are increasing industrial investment in this field, and are also used by research institutes to develop new applications and to evaluate the physical, chemical and mechanical properties of protective coatings. The protection and surface modification and their properties, are a powerful tool of modern engineering, where, new applications of thermal spray technology is an alternative technical, economic and competitive in industry, Also, it can improve processes productivity, helping to increase the functionality of parts working under severe conditions of wear.

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“…The materials in turbines, exhaust pipes, fireplaces, furnaces, dryers, boilers and pipes, among others, are frequently exposed to both erosive and corrosive environments, resulting in reduced lifetimes and large maintenance expenses [1][2][3]. An example of this is the exposure of the oil industry transport infrastructure, usually made of steel AISI SAE 1020, to high temperatures and pressures when transporting crude oil and its derivatives [4].…”

Section: Introductionmentioning

confidence: 99%

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

Pacheco

Galvis

López

et al. 2017

Ingeniare. Rev. chil. ing.

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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 TM ), and the second is a compound of ZrO 2 -36 wt.% of Al 2 O 3 (MetaCeram 25088 TM ). 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 ZrO 2 -Al 2 O 3 /Ni that efficiently protect the surfaces of steel AISI SAE 1020 when exposed to corrosive and erosive environments.Keywords: Flame spraying, wear, coatings, corrosion, ZrO 2 -Al 2 O 3 /Ni, steel AISI SAE 1020. RESUMEN

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Wear and corrosion behaviour of thermally sprayed cermet coatings

Cited by 218 publications

References 12 publications

Tribo-corrosion of coatings: a review

Tribo-corrosion of coatings: a review

La tecnología de recuperación y protección contra el desgaste está en el rociado térmico.

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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