Adaptive capacities of chromium doped graphite-like carbon films in aggressive solutions with variable pH

The corrosive behaviors and tribological performances were investigated for chromium doped graphite-like carbon films in variable pH solutions. Results showed that the as-deposited films could present good corrosion resistances in aggressive solutions that might be attributed to the effect of chromium and chromic oxide. Also, it could exhibit a great pH-dependence for the tribological behaviors of films when sliding against Si3N4 balls in aggressive solutions. The tribo-chemical reactions should play significant roles in superior tribological performances for as-deposited films in aggressive solutions. However, the poor wettability could result in a high friction coefficient for tribopair in pH=14 solution.