Improvement of diamond-like carbon electrochemical corrosion resistance by addition of nanocrystalline diamond.
Nanocrystalline diamond (NCD) particles were incorporated into diamond-like carbon (DLC) films in order to investigate NCD-DLC electrochemical corrosion resistance. The films were grown over 304 stainless steel using plasma-enhanced chemical vapor deposition. NCD particles were incorporated into DLC during the deposition process. The investigation of NCD-DLC electrochemical corrosion behavior was performed using potentiodynamic polarization against NaCl. NCD-DLC films presented more negative corrosion potential and lower anodic and cathodic current densities. The electrochemical analysis indicated that NCD-DLC films present superior impedance and polarization resistance compared to the pure DLC, which indicate that they are promising corrosion protective coatings in aggressive solutions.
Marciano
F R
FR
Instituto Nacional de Pesquisas Espaciais, São José dos Campos/SP, 12227-010, Brazil. fernanda@las.inpe.br
Almeida
E C
EC
Bonetti
L F
LF
Corat
E J
EJ
Trava-Airoldi
V J
VJ