Year: 2019
Type: book-chapter
Abstract: The aim of the study was to determine the corrosion resistance of different types of sintered carbides in alkaline and acidic environments.The degradation environment for sintered carbides was chosen so that its pH corresponds to those with which these carbides normally come into contact during their use as machining tools or drilling tools used in the extractive industry.The experimental material was selected from sintered carbides based on WC-Co and WC-Ni.The materials chosen differed in the contents of the binder and the grain size of the WC.Three alkaline media and three acidic media were selected as the degradation media, with pH values of 0, 2, 7 and 12, in which the rate at which dissolution of the cemented carbide was observed.In addition to determining the solubility rate of the binder, the corrosion resistance of sintered carbides was evaluated using a potentiostat and the binder fraction in the solvents using atomic absorption spectrometry.The experiments showed, for example, that the highest amount of binder in sintered carbides with a cobalt binder was dissolved in solutions with high sulphuric acid content.In contrast with the solution of NaOH or CH3COOH.
Authors: David Bricin, Jan Pomahac, Antonin Kriz
Language: English
Subfield: Ceramics and Composites
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2996500736