ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
Corrosion resistance of zinc electrodeposited from acidic and alkaline electrolytes using pulse current
Institute of Inorganic Chemistry, Technology, and Materials, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, 812 37 Bratislava, Slovakia
Received: 14 October 2008 Revised: 5 March 2009 Accepted: 16 March 2009
Abstract: Corrosion resistance of zinc coatings was investigated in an accelerated corrosion test in a condensation chamber. Zinc was
electrodeposited from alkaline and acidic electrolytes using direct current (DC) or pulse current (PC). The zinc coating was
subsequently protected against corrosion with a chrome (III) layer. Morphology and structure of the coatings was investigated
using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction analysis (XRD)
before and after the corrosion test. Corrosion resistance of alkaline zinc coatings electrodeposited with DC and PC under
test conditions was found to be comparable. The corrosion resistance of zinc coatings deposited from acidic electrolytes by
PC was lower in comparison with corrosion resistance of zinc coatings deposited using DC.
Keywords: zinc coating - pulse current - direct current - corrosion resistance
Full paper is available at www.springerlink.com.
Chemical Papers 63 (5) 574–578 (2009)