A coating composition comprising an effective corrosion-inhibiting amount
of a carbon pigment is provided. In one embodiment, the
corrosion-inhibiting carbon pigment is further comprising other
components such as extenders, including neutral to slightly acidic
generating extenders and acidic generating extenders, are earth
compounds, amino acids and amino acid derivatives, gelatin and gelatin
derivatives, organic-based exchange resins, and combinations thereof, to
enhance the corrosion resistance of the resultant coating film. In one
embodiment, the carbon pigment is a surface-modified carbon pigment. The
coating compositions have good adhesion to substrates such as metals,
including aluminum and aluminum alloys.