In physics, the Rehbinder effect is the reduction in the hardness and ductility of a material, particularly metals, by a surfactant film. The effect is named for Soviet scientist Piotr Aleksandrovich Rehbinder, who first described the effect in 1928. A proposed explanation for this effect is the disruption of surface oxide films, and the reduction of surface energy by surfactants. The effect is of particular importance in machining, as lubricants reduce cutting forces.
References
Further reading Andrade, E. N. D. C.; Randall, R. F. Y. (1949). "The Rehbinder Effect". Nature. 164 (4183): 1127. Bibcode:1949Natur.164.1127A. doi:10.1038/1641127a0. Malkin, A. I. (2012). "Regularities and mechanisms of the Rehbinder's effect". Colloid Journal. 74 (2): 223–238. doi:10.1134/S1061933X12020068. S2CID 97754613. Biletskyi, V. (2014). "Application aspects of adsorption opening effect of solids pore space surface". In Volodymyr Bondarenko; Iryna Kovalevs'ka; Kostiantyn Ganushevych (eds.). Progressive Technologies of Coal, Coalbed Methane, and Ores Mining. CRC Press. pp. 121–122. doi:10.1201/b17547-22. ISBN 978-1-138-02699-5.