Study on the effect of graphene/Fe3O4 film on friction and wear performance under water lubrication

Abstract

In this paper, the corrosion film of Sodium Dodecyl Sulfate (SDS) and graphene aqueous solution has been studied. The results showed that the corrosion film is a kind of graphene/Fe 3 O 4 film, representing the positive effect of tribological performance under water lubrication. Under the protection of graphene/Fe 3 O 4 film, the friction coefficient of steel decreases from 0.41 to 0.17, and the wear scar depth falls from 2.57 μ m to 0.98 μ m at load of 2 N . Graphene/Fe 3 O 4 film exhibits excellent tribological properties under water lubrication due to three reasons. Graphene and Fe 3 O 4 are both antifriction materials, effectively reducing the friction coefficient and wear rate under water lubrication. The hydrophilicity of graphene/Fe 3 O 4 film is significantly improved, making graphene enter the gap between friction pairs easily. As a result, the pitting in the corroded surface can continuously collect and release the Fe 3 O 4 and graphene. These antifriction materials can work longer. Under the synergistic effect of the above three aspects, graphene/Fe 3 O 4 film had excellent friction reducing and anti-wear effect under water lubrication. • Graphene/Fe 3 O 4 film can be prepared on the AISI-52100 steel surface as Fe 3 O 4 can adsorb graphene. • Graphene/Fe 3 O 4 film improves the tribological properties of AISI-52100, reducing the friction coefficient by 59 % and the wear scar depth by 61 %. • The graphene/Fe 3 O 4 film can play a role in reducing friction and wear mainly due to the following three points: antifriction of graphene and Fe 3 O 4 , the increase of wettability of the graphene/Fe 3 O 4 film, the collection and release mechanism of graphene and Fe 3 O 4.