Improvement of diamond-like carbon electrochemical corrosion resistance by addition of nanocrystalline diamond

F R Marciano; E C Almeida; L F Bonetti; E J Corat; V J Trava-Airoldi

doi:10.1016/j.jcis.2009.11.023

Improvement of diamond-like carbon electrochemical corrosion resistance by addition of nanocrystalline diamond

J Colloid Interface Sci. 2010 Feb 15;342(2):636-7. doi: 10.1016/j.jcis.2009.11.023. Epub 2009 Nov 14.

Authors

F R Marciano¹, E C Almeida, L F Bonetti, E J Corat, V J Trava-Airoldi

Affiliation

¹ Instituto Nacional de Pesquisas Espaciais, São José dos Campos/SP, 12227-010, Brazil. fernanda@las.inpe.br

PMID: 20018289
DOI: 10.1016/j.jcis.2009.11.023

Abstract

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.