Ni–Cr enrichment on stainless steel SS316 L resulting from chemical activation enabled the deposition of carbon by spraying a stable suspension of carbon nanoparticles; trace Ag was deposited in situ to prepare a thin continuous Ag-doped carbon film on a porous carbon-coated SS316 L substrate. The corrosion resistance of this film in 0.5 mol·L~(-1) H_2SO_4 solution containing 5 ppm F- at 80°C was investigated using polarization tests. The results showed that the surface treatment of the SS316 L strongly affected the adhesion of the carbon coating to the stainless steel. Compared to the bare SS316 L, the Ag-doped carbon-coated SS316 L bipolar plate was remarkably more stable in both the anode and cathode environments of proton exchange membrane fuel cell(PEMFC) and the interface contact resistance between the specimen and Toray 060 carbon paper was reduced from 333.0 m?·cm~2 to 21.6 m?·cm~2 at a compaction pressure of 1.2 MPa. Ni-Cr enrichment on stainless steel SS316 L resulting from chemical activation enabled by the deposition of carbon by spraying a stable suspension of carbon nanoparticles; trace Ag was deposited in situ to prepare a thin continuous Ag-doped carbon film on a porous carbon-coated SS316 L substrate. The corrosion resistance of this film in 0.5 mol·L -1 H_2SO_4 solution containing 5 ppm F-at 80 ° C was investigated using polarization tests. The results showed that the surface treatment of the SS316 L strongly affected the Compared to the bare SS316 L, the Ag-doped carbon-coated SS316 L bipolar plate was remarkably more stable in both the anode and cathode environments of proton exchange membrane fuel cell (PEMFC) and the interface contact resistance between the specimen and Toray 060 carbon paper was reduced from 333.0 m · cm -2 to 21.6 m · cm -2 at a compaction pressure of 1.2 MPa.