Cemented tungsten carbide tool bits are widely used in cutting, oil and gas, tunneling, and mining industries there these materials exposed to extremely harsh environments that cause early stages of failure. Tungsten carbide hardmetals are suffering from tribocorrosion, which is a material degradation process that occurs due to the combined action of wear and corrosion. On the one hand, tungsten carbide materials composed of hard ceramics (WC grains) phase in a soft metal matrix binder (Co, Fe, and Ni) phase; hence, it leads to different tribological mechanisms. On the other hand, the different electrode potential of hard WC grains (act as a cathode) and soft binder phase (act as an anode) leads to the formation of the micro galvanic couples between these phases in many aqueous environments causing corrosion. Since tribocorrosion mechanisms are significantly influenced by the varying composition and microstructure of tungsten carbide hardmetals, the effect of size and morphology of the WC grains on tribocorrosion has also been reviewed. This review particularly highlighting the various tribological and electrochemical aspects and their possible degradation mechanisms that are generally encountered by the drill bits during operating conditions. Hence, the understanding of these mechanisms is, therefore, very essential for the selection, improvement, and development of high-performance hardmetals.

硬质合金碳化钨工具刀头广泛用于切割，石油和天然气，隧道和采矿业，这些材料暴露于极端恶劣的环境中，会导致早期故障。碳化钨硬质合金遭受摩擦腐蚀，这是由于磨损和腐蚀的共同作用而发生的材料降解过程。一方面，碳化钨材料由在软金属基体粘结剂（Co，Fe和Ni）相中的硬质陶瓷（WC晶粒）相组成；因此，它导致了不同的摩擦学机理。另一方面，硬质WC晶粒（用作阴极）和软质粘结剂相（用作阳极）的不同电极电势会导致在许多水性环境中这些相之间形成微电流电偶，从而引起腐蚀。由于碳化钨硬质合金的组成和微观结构的变化会显着影响摩擦腐蚀机理，因此，还对WC晶粒的尺寸和形态对摩擦腐蚀的影响进行了综述。这篇综述特别强调了各种摩擦学和电化学方面以及钻头在工作条件下通常会遇到的各种可能的降解机理。因此，对这些机理的理解对于高性能硬质合金的选择，改进和开发至关重要。这篇综述特别强调了各种摩擦学和电化学方面以及钻头在工作条件下通常会遇到的各种可能的降解机理。因此，对这些机理的理解对于高性能硬质合金的选择，改进和开发至关重要。这篇综述特别强调了各种摩擦学和电化学方面以及钻头在工作条件下通常会遇到的各种可能的降解机理。因此，对这些机理的理解对于高性能硬质合金的选择，改进和开发至关重要。