Corrosion behaviour of WC hardmetals with nickel-based binders

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abstract

Cobalt is the standard binder in tungsten carbide (WC) hardmetals due to its compatibility with the WC phase, resulting in composites with exceptional hardness and wear resistance. However, their corrosion resistance is not satisfactory in many applications, leading to the early deterioration and failure of tools and equipment. In this work, the corrosion of WC hardmetals with three alternative binders (FeCoNi, NiCrCoMo and NiCrMo) is compared with a benchmark WC-Co composite, using electrochemical techniques such as open circuit potential (OCP) monitoring, polarisation curves and electrochemical impedance spectroscopy (EIS), assisted by scanning electron microscopy (SEM).

keywords

CO HARDMETALS; ANODIC POLARIZATION; MECHANICAL CHARACTERIZATION; ELECTROCHEMICAL-BEHAVIOR; CEMENTED CARBIDES; GRAIN-SIZE; NI; COMPOSITES; ADDITIONS; TOUGHNESS

subject category

Materials Science; Metallurgy & Metallurgical Engineering

authors

Rocha, AMF; Bastos, AC; Cardoso, JP; Rodrigues, F; Fernandes, CM; Soares, E; Sacramento, J; Senos, AMR; Ferreira, MGS

our authors

no photo

Alexandre Manuel Ferro Rocha

PhD Student
foto Ana Maria de Oliveira e Rocha Senos

Ana Maria de Oliveira e Rocha Senos

Collaborator
foto António Alexandre Cunha Bastos

António Alexandre Cunha Bastos

Assistant Researcher
no photo

Cristina Maria da Silva Fernandes

Collaborator
foto João Pedro Veleirinho Cardoso

João Pedro Veleirinho Cardoso

PhD Student
foto Mário Guerreiro Silva Ferreira

Mário Guerreiro Silva Ferreira

Retired Professor

Groups

G2 - Photonic, Electronic and Magnetic Materials
G3 - Electrochemical Materials, Interfaces and Coatings

Projects

HARDCorr - Desenvolvimento de metal duro com elevada resistência ao desgaste e à corrosão (HardCorr)

CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)

acknowledgements

This work is financed by Portugal 2020 through European Regional Development Fund (ERDF) in the frame of Operational Competitiveness and Internationalization Programme (POCI) and in the scope of the project HardCorr (POCI-01-0247-FEDER-003382). The work was developed within the scope of the project CICECO-Aveiro Institute of Materials, POCI-01-0145-FEDER-007679 (FCT Ref. UID/CTM/50011/2013), financed by national funds through the FCT/MEC and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement.

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Publication Details

type
Journal Article
year
2019
journal
CORROSION SCIENCE
volume
147
publisher
PERGAMON-ELSEVIER SCIENCE LTD
issn
0010-938X
isbn
1879-0496
digital object identifier
10.1016/j.corsci.2018.11.015
web of science article identifier
WOS:000456902100034

Journal Metrics (JCR 2019)

Journal Impact Factor
6.479
Journal Impact Factor (5 yrs)
6.894
category normalized journal percentile
89.262

Citations

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