The tribocorrosion (resistance, mode, and mechanism) of ultrafine-grained cemented carbides of WC-Co, WC-(Co+Ni), and WC-(Co+Ni+Cr) was evaluated and compared critically under the typical conditions of use in highly-alkaline wet medium by means of detailed studies of wet-sliding wear at pH ~ 13.65, complemented by separate detailed studies of both corrosion at pH ~ 13.65 and dry-sliding wear. It is shown that: (i) WC-Co undergoes the most severe tribocorrosion, and separately the most intense corrosion and little mechanical wear; (ii) WC-(Co+Ni) undergoes moderate tribocorrosion, and separately modest corrosion and little mechanical wear; and (iii) WC-(Co+Ni+Cr) undergoes only slight tribocorrosion, and separately almost negligible corrosion and very little mechanical wear. These observations were explicable in the framework of a conceptual model based on the different severities of the leaching of the binder pools and weakening of the WC/binder interfaces induced by corrosion, followed by material pullout (of both individual WC grains and/or large chunks of WC grains and binder) caused by frictional mechanical contact. It was also demonstrated that any of these three cemented carbides would be very useful for tribological applications because, despite their differences in performance, they all undergo just mild tribocorrosion and very mild dry-sliding wear. Nonetheless, WC-(Co+Ni+Cr) is to be recommended over both WC-Co and WC-(Co+Ni) for tribological applications in dry conditions, and is doubtless the cemented carbide of choice for tribological applications in alkaline corrosive media.

在典型的使用条件下，对WC-Co，WC-（Co + Ni）和WC-（Co + Ni + Cr）的超细硬质合金的摩擦腐蚀性能（电阻，模式和机理）进行了评估并进行了严格比较。在高碱性湿介质中，通过对pH〜13.65的湿滑磨损的详细研究，以及对pH〜13.65的腐蚀和干滑磨损的单独详细研究的补充。结果表明：（i）WC-Co遭受最严重的摩擦腐蚀，并且分别经历最强烈的腐蚀和极少的机械磨损；（ii）WC-（Co + Ni）受到中等程度的摩擦腐蚀，且腐蚀程度适中，机械磨损极小；和（iii）WC-（Co + Ni + Cr）仅发生轻微的摩擦腐蚀，而腐蚀几乎可以忽略不计，机械磨损也很小。这些观察结果可在概念模型的框架中得到解释，该模型基于粘结剂池浸出的不同严重性以及由腐蚀引起的WC /粘结剂界面的削弱，然后是材料的拔出（单个WC晶粒和/或大块的）摩擦机械接触引起的WC颗粒和粘合剂的磨损）。还证明了这三种硬质合金中的任何一种对于摩擦学应用都是非常有用的，因为尽管它们的性能有所不同，但它们都只经受了轻微的摩擦腐蚀和非常轻微的干滑磨损。尽管如此，对于在干燥条件下的摩擦学应用，建议在WC-Co和WC-（Co + Ni）上均推荐使用WC-（Co + Ni + Cr）。