Journal
CORROSION SCIENCE
Volume 51, Issue 1, Pages 197-202Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2008.10.005
Keywords
Metal coatings; Mild steel; Electrochemical impedance spectroscopy (EIS); Corrosion rate
Funding
- SERC [SR/S3/ME/047/2005]
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A comparison was made between the electrochemical corrosion behaviors of chromium deposited from hexavalent [Cr(VI)] and trivalent [Cr(III)] chromium baths using direct current (DCD) and pulse electro deposited (PED) techniques. Chromium coatings were deposited on mild-steel (MS) substrate. The corrosion behavior of both DCD and PED chromium from Cr(VI) and Cr(III)-baths in 3.5%NaCl solution was studied using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results indicated that PED chromium from Cr(VI) and Cr(III)-baths have higher charge-transfer resistance R-ct and very low I-corr than that of DCD chromium on mild-steel substrate. (c) 2008 Elsevier Ltd. All rights reserved.
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