Comparative Tribological Properties of Modified Magnesium Silicate Hydroxide and Serpentine Powder as Lubricant Additives

摘要

The species of lubricant additives expanded along with the development of technology, extending from natural minerals to synthetic compounds Advancements in technologies and production capabilities have allowed for size controlled differentiation from a large micron scale to nanoparticles. Meanwhile, the performance improves with finer particles, especially for anti-wear properties. With the encouragement of clean and environmentally friendly additives, ZDDP and other anti-wear agents are constantly being replaced because of its environmental hazards, the researchers turn to the environment-friendly and more efficient anti-wear additives. Serpentine, as a natural mineral, has been widely studied since it was found to be used as lubricant additives. However, the complex composition of natural minerals brings difficulties to explain its specific anti-wear mechanism. As the main component of serpentine, magnesium silicate hydrate was synthesized and added into the base oil for better tribological properties In this work we prepare modified magnesium silicate hydroxide (MSH) and compare the tribological performances as lubricant additives between synthetic MSH and serpentine mineral under different experiment conditions, such as load, speed.