title: Microtensile strain on the corrosion performance of diamond-like carbon coating.
abstract: Hydrogenated diamond-like carbon films (a-C:H DLC) were deposited on STS 304 substrates for the fabrication of vascular stents by means of the r.f. plasma-assisted chemical vapor deposition technique. This study provides reliable and quantitative data for the assessment of the effect of strain on the corrosion performance of DLC-coated systems in the simulated body fluid obtained through electrochemical techniques (potentiodynamic polarization test and electrochemical impedance spectroscopy) and surface analysis (scanning electron microscopy). The electrolyte used in this test was 0.89% NaCl solution at pH 7.4 and 37 degrees C. It was found that the corrosion resistance of the plastically deformed DLC coating was insufficient for use as a protective film in a corrosive body environment. This is due to the increase in the delamination area and degradation of the substrate's corrosion properties with increasing tensile deformation.
authors: Department of Advanced Materials Engineering, Sungkyunkwan University, 300 Chunchun-Dong, Jangan-Gu, Suwon 440-746, Korea.
authors: Seung-Hwan
authors: SH
authors: Lee
authors: Jung-Gu
authors: JG
authors: Kim
authors: Heon-Woong
authors: HW
authors: Choi
authors: Kwang-Ryeol
authors: KR
authors: Lee
mesh_terms: D002244:Carbon; D020099:Coated Materials, Biocompatible; D003343:Corrosion; D018130:Diamond; D008422:Materials Testing; D008954:Models, Biological; D015607:Stents; D013718:Tensile Strength
chemical_list: D020099:Coated Materials, Biocompatible; D002244:Carbon; D018130:Diamond