Corrosion Behaviour of Cemented Carbides with Co- and Ni-Alloy Binders in the Presence of Abrasion

More and more often, cemented carbides are employed for the production of wear resistant components have to face highly demanding service conditions that combine different damage mechanisms. A key example is range tetraphasic (sea water, sand, liquid gaseous hydrocarbons) flows encountered in Oil Gas extraction industry. Notwithstanding importance operating regimes this type, availability fundamental quantitative information on corrosion performance presence abrasion still limited. In paper, we report a systematic study behaviour tungsten carbide grades with binders containing amounts cobalt (Co), nickel (Ni), chromium (Cr) noble metal additions, subjected controlled mechanical abrasion, impacting stability nature pseudopassivation films. work, special attention devoted Cr, classical additive inhibits Ostwald ripening (WC) particles notably improves resistance ultrafine-to-fine WC grain size low-to-medium binder content. We assessed impact composition anodic by means linear-sweep voltammetry chronopotentiometry as well properties. The application under electrochemical control carried out an in-house modified ASTM B611 apparatus, equipped three-electrode system, enabling investigation synergy damaging conditions. Increased environments without added chloride—both absence abrasion—was observed all Co- Ni-based which growing quantities Cr were added. Moreover, doping ruthenium (Ru) further enhances resistance. Regarding addition Ru increases ability regenerating film. optimized compositions been highlighted open up attractive opportunities improved deployment new applications.