The corrosion behaviour of WC-VC-Co hardmetals in acidic media

Autor:	Christopher N Machio, Sanja Potgieter-Vermaak, J.W. van der Merwe, J.H. Potgieter, D. S. Konadu
Rok vydání:	2010
Předmět:	Vanadium carbide Materials science Passivation General Chemical Engineering Metallurgy chemistry.chemical_element Sulfuric acid General Chemistry Cermet Corrosion Carbide chemistry.chemical_compound chemistry Tungsten carbide General Materials Science Cobalt Nuclear chemistry
Zdroj:	Corrosion Science. 52:3118-3125
ISSN:	0010-938X
DOI:	10.1016/j.corsci.2010.05.033
Popis:	The effect of increasing vanadium carbide (VC) content on the corrosion behaviour of tungsten carbide – 10 25 wt% cobalt hardmetals was investigated in 1M hydrochloric (HCl), and sulphuric (H2SO4) acids solutions. 26 Increasing VC content makes the open circuit potential (OCP) in the test solutions more negative than the 27 base alloy. Specimens exhibited pseudo passivation in all the test solutions. Increasing VC led to decreasing 28 corrosion current density. However, the corrosion current densities during chronoamperometric tests 29 were lower for 0 wt% VC. XRD and Raman spectroscopy showed that hydrated WO3 formed in the surface
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::83f98c181f0529d92ca3acc977a1b9ce https://doi.org/10.1016/j.corsci.2010.05.033 Zobrazit plný text záznamu Full Text from ScienceDirect