16 - Tribochemistry of abrasive machining

Abstract

Chapter 16 describes tribochemical reaction processes and wear processes involved in abrasive machining. Tribochemical wear is the most complex type of wear involving chemical processes, due to active agents in the process fluid and/or the surrounding atmosphere, and mechanical action due to the removal process under the action of the applied forces. Chemical action results from the active substances in the environment and in the process fluid. Corrosion wear is manifested by formation of reaction products as a result of chemical interactions between the elements of a tribosystem by tribological action. The prefix tribo is used to denote the special nature of a mechanical, physical, and chemical process when subject to intense surface deformation, friction, and micro-cutting in abrasive contact. For better understanding of tribochemical processes in the contact between abrasive and work-material, it is necessary to consider the nature of the components of an abrasive and the nature of the work-material. Other elements involved are the abrasive bond, the process fluid and the environment. Each of these is considered and their roles reviewed in terms of such characteristics as chemical composition and affinity. This is a substantial chapter analyzing complex effects and selection aspects of great importance. Simple conclusions are achieved for preferred corrosion types. References are provided to previous work on tribochemistry of abrasive machining processes.