Effect of substrate temperature and nitrogen concentration during sputtering on corrosion behaviour of AlN coatings. (2nd September 2016)

• Record Type: Journal Article
• Authors: Choudhary, R. K.; Mishra, P.; Roychowdhury, S.; Kain, V.
• Is Part Of: Transactions of the Institute of Metal Finishing. Volume 94:Number 5(2016:Sep.)
• Page Start: 250
• Page End: 253
• Publication Date: 2016-09-02
• Subjects: Aluminium nitride -- Coating -- Sputtering -- Corrosion; Metals -- Finishing -- Periodicals; Metals -- Surfaces -- Periodicals; Metallurgy -- Periodicals; 671.705
• DOI: 10.1080/00202967.2016.1208384
• Languages: English
• ISSNs: 0020-2967

Abstract

Abstract : Aluminium nitride coatings were formed on stainless steel substrate by DC-reactive balanced magnetron sputtering at various nitrogen concentrations in the sputtering gas mixture, and different substrate temperatures. The electrochemical corrosion behaviour of the coatings obtained was studied in 0.5 M H2 SO4 . Continuous improvement in corrosion resistance of the coatings was observed with increasing coating deposition temperature up to 500 °C. The corrosion potential shifted from −0.66 VSCE at 100 °C to −0.33 VSCE at 500 °C. Accordingly, the corrosion current density decreased significantly with increase in the deposition temperature. However, no major difference in corrosion behaviour could be noticed for the coatings formed at various nitrogen concentrations.