Corrosion of organosilane coated Mg4Y alloy in sodium chloride solution evaluated by impedance spectroscopy and pH changes

Electrochemical impedance spectroscopy (EIS), open circuit potential and pH changes were used to examine the corrosion of magnesium 4% yttrium alloy (Mg4Y) with and without a silane-epoxy-coating (SEC) in a stirred 0.154M NaCl solution at 37°C. For a good quality SEC we find a relatively low non-Far...

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Bibliographic Details
Published in:Electrochimica acta Vol. 70; pp. 165 - 170
Main Authors: Doepke, Amos, Xue, Dingchuan, Yun, Yeoheung, Vanooij, William J., Brian Halsall, H., Heineman, William R.
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 30.05.2012
Elsevier
Subjects:
Applied sciences
Corrosion
Corrosion mechanisms
Corrosion tests
EIS
Electrochemical impedance spectroscopy
Exact sciences and technology
Magnesium
Magnesium base alloys
Metals. Metallurgy
Open circuit potential
Yttrium base alloys
Corrosion
EIS
Magnesium
Silicon Organic compounds
Organic silane
Alkaline earth metal
Coated material
Magnesium alloy
pH
Yttrium alloy
Binary alloy
Sodium Chlorides
Electrochemical impedance spectroscopy
ISSN:0013-4686, 1873-3859
Online Access:Get full text
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Summary:Electrochemical impedance spectroscopy (EIS), open circuit potential and pH changes were used to examine the corrosion of magnesium 4% yttrium alloy (Mg4Y) with and without a silane-epoxy-coating (SEC) in a stirred 0.154M NaCl solution at 37°C. For a good quality SEC we find a relatively low non-Faradaic resistance of 266Ωcm2. The quality of the SEC was affected by the curing temperature. In this article we compare the electrochemical measurements taken during corrosion of bare Mg4Y, Mg4Y with a SEC that remained intact, and a SEC that did not protect the Mg from corrosion.
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ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.03.040