Corrosion resistance of WC hardmetals with different Co and Ni-based binders


In this work, industrially relevant WC composites with alternative binders (Ni, CoNi, NiCr, CoCr, CoNiCr and NiCrMo) were produced and their corrosion resistance in 0.5 M NaCl was compared to conventional WC-Co system. The main objective is to develop hardmetals with higher corrosion resistance to extend the lifetime of tools and equipment, reducing the demand for new parts and maintenance, thus decreasing the total cost of the operation. The study includes different electrochemical techniques, namely corrosion potential monitoring, Electrochemical Impedance Spectroscopy (EIS) and polarization curves. The purpose is to evaluate the influence of each element on the corrosion resistance of the composites produced.



subject category

Materials Science; Metallurgy & Metallurgical Engineering


Pereira, P; Rocha, AMF; Sacramento, J; Oliveira, FJ; Senos, AMR; Malheiros, LF; Bastos, AC

our authors


P. Pereira acknowledges FCT for financial support (SFRH/BD/138040/2018). This work was developed within the scope of the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020 & UIDP/50011/2020, financed by national funds through the Portuguese Foundation for Science and Technology/MCTES and project HARDTECH-POCI-01-0247-FEDER-045283, financed by FEDER under PT2020 Partnership Agreement. A. M. Ferro Rocha thanks FCT for the PhD grant SFRH/BD/147060/2019. A. C. Bastos is funded by national funds (OE), through FCT - Fundacao para a Ciencia e a Tecnologia, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of the article 23, of the Decree-Law 57/2016, of August 29, changed by Law 57/2017, of July 19 (CEECIND/01329/2017).

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