Self-lubricant Ni-CF (S) (Nickel-Graphite fluoride (S)) composite has been coated by electroplating from CF (S) particles suspended in nickel-watt electrolytes.
We studied fine CF (S) particle dispersion in the electrolyte and factors controlling the amount of deposited CF (S) in the composite coating.
CF (S) particles were dispersed in the electrolyte by adsorbing fluorocarbon cationic surfactants on to particles.
Maximum amount of about 4.3wt% CF (S) was deposited in the Ni-CF (S) composite coating at a dispersion concentration of 70g/L. The amount of CF (S) and overpotential decreased linearly with increased nickel ion concentration in that electrolyte and increased temperature.
The amount of CF (S) thus appears related to overpotential.