Corrosion behaviour of WC hardmetals with nickel-based binders
authors Rocha, AMF; Bastos, AC; Cardoso, JP; Rodrigues, F; Fernandes, CM; Soares, E; Sacramento, J; Senos, AMR; Ferreira, MGS
nationality International
journal CORROSION SCIENCE
author keywords Hardmetals; WC; Metal matrix composites; EIS
keywords CO HARDMETALS; ANODIC POLARIZATION; MECHANICAL CHARACTERIZATION; ELECTROCHEMICAL-BEHAVIOR; CEMENTED CARBIDES; GRAIN-SIZE; NI; COMPOSITES; ADDITIONS; TOUGHNESS
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).
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0010-938X
year published 2019
volume 147
beginning page 384
ending page 393
digital object identifier (doi) 10.1016/j.corsci.2018.11.015
web of science category Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000456902100034

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