EFECTO DE UN TRATAMIENTO TÉRMICO EN LA RESISTENCIA A LA CORROSIÓN DE RECUBRIMIENTOS TERMORROCIADOS HVOF DE MEZCLAS DE UNA ALEACION BASE Ni CON WC-12%Co

Linda Elcida Gil; Nerismar Angulo; Jaime M. Minchala; Byron R, Romero; Edwuin J. Carrasquero

doi:10.5281/zenodo.7892462

EFFECT OF POST HEAT TREATMENT ON THE CORROSION RESISTANCE OF NICKEL BASED SELF-FLUXING ALLOY CO-DEPOSITED WITH TUGSTENO-COBALT HVOF COATINGS

Authors

Linda Elcida Gil Centro de Estudios de Corrosión y Biomateriales, UNEXPO, Puerto Ordaz, Estado Bolívar, Venezuela
Nerismar Angulo
Jaime M. Minchala
Byron R, Romero
Edwuin J. Carrasquero

DOI:

https://doi.org/10.5281/zenodo.7892462

Abstract

Nickel based coatings are widely used in numerous applications in the chemical and petroleum industries, due to their mechanicalproperties and corrosion resistance. The aim of the present work was the studied the influence of a post heat treatment on corrosionresistance of coatings of NiCrBSi COLMONOY 88® alloy with different amounts of WC-12%Co commercial powders on 1020 AISIsteel substrate using high velocity oxy-fuel (HVOF) process. Microstructural characteristics of the coatings were evaluated employingOptical Microscopy coupled with image analysis and SEM with EDS microanalysis. The coatings corrosion resistance was evaluatedusing anodic Potentiodynamic Polarization and Electrochemical Impedance Spectroscopy (EIS) techniques. The results have shown thatthe corrosion resistance of the coating-substrate system decreased with the increase of the WC-12%Co amount in the powder mixture,obtaining the worst results for the mixture with 70% of WC-12Co. The coatings corrosion resistance improved substantially with the postheat treatment.

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Author Biography

Linda Elcida Gil, Centro de Estudios de Corrosión y Biomateriales, UNEXPO, Puerto Ordaz, Estado Bolívar, Venezuela

Ingeniero de Materiales, Mención Metalurgia, Universidad Simón Bolívar, 1983.Profesor Titular del Departamento de Ingeniería Metalúrgica de la UNEXPO, Vicerrectorado Puerto Ordaz. Coordinadora del Centro de Estudios de Corrosión y Biomateriales de la UNEXPO. Miembro del Comité Académico del programa de "Doctorado en Ciencias de la Ingeniería" de la UNEXPO.

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Published

2019-07-31

How to Cite

Gil, L. E., Angulo, N., Minchala, J. M., Romero, B. R., & Carrasquero, E. J. (2019). EFFECT OF POST HEAT TREATMENT ON THE CORROSION RESISTANCE OF NICKEL BASED SELF-FLUXING ALLOY CO-DEPOSITED WITH TUGSTENO-COBALT HVOF COATINGS. LatinAmerican Journal of Metallurgy and Materials, 105–120. https://doi.org/10.5281/zenodo.7892462

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Issue

2019, 39(2)

Section

Regular Articles

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