ABSTRACT
Abstract .................................................................................................................. 149 7.1Introduction: Colloidal Categories of Water-Based Lubricants ................... 150 7.2Water-Lubricant Oil-Surfactant (Emulsi”er) System ................................. 151
7.2.1Emulsi”cation Mechanism in Colloid Formation............................. 153 7.2.2Self-Aggregation and Solubilization ................................................. 156 7.2.3 Thermodynamic Considerations of Water-Lubricant
Oil-Surfactant Systems .................................................................... 159 7.3Importance of Colloidal Processes in Key Properties of Lubricant
Emulsions...................................................................................................... 161 7.3.1Effects of Colloids on Lubrication at Molecular Level .................... 161 7.3.2 In‘uence of Colloidal Transformations on Lubricant
Appearance and Storage ................................................................... 162 7.3.3Colloidal Processes during Surface Wetting .................................... 165 7.3.4Key Surfactants for Surface Wetting Control ................................... 167
7.4Conclusions ................................................................................................... 169 Acknowledgments .................................................................................................. 169 References .............................................................................................................. 170
droplets, and other colloidal structures. Molecular mechanisms are suggested to explain the aging processes of lubricant concentrates and emulsions as well as lubricant ”lm formation both on the open surface, as in wetting, and between the moving surfaces. Attention is also given to the chemical structures of surfactants, used to control wetting of metal surfaces by water-based lubricants.
