Diamond like carbon (DLC) films are deposited on AISI 304 SS using Plasma Enhanced Chemical Vapour Deposition (PECVD) method and their corrosion behaviour is studied. Corrosion resistance of DLC-coated AISI 304 SS has been found to increase in presence of corrosive solution (3.5% NaCl) as DLC functions physical barrier and restrain it from anodizing. DLC film is deposited using acetylene. Corrosion behaviour of the coated samples is tested by potentio-dynamic method. Surface morphology of the samples before and after corrosion tests is observed using high-resolution optical microscope as well as AFM. (c) 2007 Elsevier B.V. All rights reserved.