Effect of Relative Humidity on the Tribological Properties of Self-Lubricating H₃BO₃ Films Formed on the Surface of Steel Suitable for Biomedical Applications

Table 4

Solid materials with self-lubricating properties.

Material	Sliding condition	RH (%)	Friction coefficient	Reference
H3BO3 on VB2	440C; Pin-on-disk	40–50	0.1–0.05	[5]
H3BO3 on B4C	Zirconia; Pin-on-disk	38–84	0.04	[6]
B2O3 on C/C	Ni60-friction and wear tester	—	0.06–0.08	[13]
H3BO3 on AISI 316 steel	WC; Pin-on-disk	60	0.02	Present study