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A study of performance of corrosion prevention compounds on AA2024-T3 with electrochemical impedance spectroscopy

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Title: A study of performance of corrosion prevention compounds on AA2024-T3 with electrochemical impedance spectroscopy
Authors: Gui, F.1, Kelly, R.G. rgk6y@virginia.edu
Source: Electrochimica Acta. Jan2006, Vol. 51 Issue 8/9, p1797-1805. 9p.
Subjects: Corrosion & anti-corrosives, Impedance spectroscopy, Electrochemical analysis, Interfaces (Physical sciences), Electric double layer, Surface coatings
Abstract: Abstract: The performance of corrosion prevention compounds (CPC) on AA2024-T3 was assessed with electrochemical impedance spectroscopy (EIS). The good correlation between the protection performance of CPC and both the interfacial impedance and double layer capacitance allowed two assessment criteria to be defined; as found for AA7075-T6, excellent protection was exhibited by CPC-coated surfaces with interfacial impedances above 0.1MΩcm2 or double layer capacitances below 7.6×10−8 F/cm2. A correlation between double layer capacitance (C dl) and corroded area was also obtained. This latter correlation offers an alternative to evaluation of CPC performance via the corroded area calculated from C dl. In addition, a prediction method was demonstrated based on impedance parameters that showed the feasibility of using data from 30 days to predict the performance of CPC after 180 days exposure. It was found that the CPC failure can be greatly accelerated without changing the relative ranking among the CPC used by introducing intentional scratches on CPC-coated specimens. In particular, the minimum time needed to rank various CPC was reduced to 8 days for scratched specimens from several months for unscratched ones. [Copyright &y& Elsevier]
Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 19468326
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  Data: A study of performance of corrosion prevention compounds on AA2024-T3 with electrochemical impedance spectroscopy
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  Data: <searchLink fieldCode="AR" term="%22Gui%2C+F%2E%22">Gui, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kelly%2C+R%2EG%2E%22">Kelly, R.G.</searchLink><i> rgk6y@virginia.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Electrochimica+Acta%22">Electrochimica Acta</searchLink>. Jan2006, Vol. 51 Issue 8/9, p1797-1805. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Corrosion+%26+anti-corrosives%22">Corrosion & anti-corrosives</searchLink><br /><searchLink fieldCode="DE" term="%22Impedance+spectroscopy%22">Impedance spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+analysis%22">Electrochemical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Interfaces+%28Physical+sciences%29%22">Interfaces (Physical sciences)</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+double+layer%22">Electric double layer</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+coatings%22">Surface coatings</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: The performance of corrosion prevention compounds (CPC) on AA2024-T3 was assessed with electrochemical impedance spectroscopy (EIS). The good correlation between the protection performance of CPC and both the interfacial impedance and double layer capacitance allowed two assessment criteria to be defined; as found for AA7075-T6, excellent protection was exhibited by CPC-coated surfaces with interfacial impedances above 0.1MΩcm2 or double layer capacitances below 7.6×10−8 F/cm2. A correlation between double layer capacitance (C dl) and corroded area was also obtained. This latter correlation offers an alternative to evaluation of CPC performance via the corroded area calculated from C dl. In addition, a prediction method was demonstrated based on impedance parameters that showed the feasibility of using data from 30 days to predict the performance of CPC after 180 days exposure. It was found that the CPC failure can be greatly accelerated without changing the relative ranking among the CPC used by introducing intentional scratches on CPC-coated specimens. In particular, the minimum time needed to rank various CPC was reduced to 8 days for scratched specimens from several months for unscratched ones. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Electrochimica Acta is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.electacta.2005.02.141
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      – Code: eng
        Text: English
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        PageCount: 9
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      – SubjectFull: Impedance spectroscopy
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      – SubjectFull: Electrochemical analysis
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      – SubjectFull: Interfaces (Physical sciences)
        Type: general
      – SubjectFull: Electric double layer
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      – SubjectFull: Surface coatings
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              Text: Jan2006
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