Abstract

CHIPATECUA GODOY, Yuri Lizbeth; MARULANDA CARDONA, Diana Maritza  and  OLAYA FLOREZ, Jhon Jairo. Evaluating the corrosion resistance of UBM-deposited Cr/CrN multilayers. Ing. Investig. [online]. 2011, vol.31, n.1, pp.16-25. ISSN 0120-5609.

This work was aimed at evaluating the corrosion resistance of multilayer Cr/CrN coatings deposited by the unbalanced magnetron sputtering (UBM) technique. Coatings were produced at room temperature using 400 mA discharge current, 9 sccm argon flow and 3 sccm nitrogen flow. The total thickness of coatings deposited on AISI 304 stainless steel and silicon (100) varied between 0.2 a 3 μm as bilayer period varied between 20 and 200 nm. Coating microstructure and chemical composition was studied through scanning electron microscopy (SEM) and texture and crystalline phases were analysed by X-ray diffraction (XRD) before and after corrosion tests which were carried out by potentiodynamic polarisation using 0.5 M H₂SO₄ + 0.05M KSCN s

Keywords : Unbalanced magnetron sputtering; potentiodynamic polarisation; thin film; corrosion resistance; Cr/CrN.

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