Abstract
Corrosion-induced delamination of an epoxy coating on the AISI/SAE 1045 carbon steel was studied under a humid atmospheric condition (temperature of 25 °C, one standard atmospheric pressure, and relative humidity of 90 %) by the technique of scanning Kelvin probe force microscopy (SKPFM). Surface-polished 1045 samples were first cold coated with the epoxy and then subject to the atmospheric corrosion under the humid atmospheric condition. At specified time intervals, surface Volta potential of the samples was measured using the SKPFM over the dry surface of epoxy coating. The map of Volta potentials demonstrated high contrasts among three characteristic zones: intact steel-epoxy interface, delaminated interface, and interface with active corrosion, which based on a rigorous calibration procedure were then linked to the actual corrosion potential of the steel (measured using a potentiostat w.r.t. a saturated calomel electrode). The SKPFM was found to be able to provide a mean of direct and nondestructive detection of early active corrosion and coating delamination of steels at a submicroscopic resolution, which outperformed the conventional electrochemical techniques for such purposes.
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The article "Investigation of coating delamination on steels by surface topography and Volta potential difference", published in Journal of Solid State Electrochemistry 17 (2013) 1109-1115, DOI 10.1007/s10008-012-1972-4, is retracted upon request of the authors, as the article had been simultaneously submitted to and published in another journal (Pan T, "Delamination of organic coating on carbon steel studied by scanning Kelvin probe force microscopy", Surface and Interface Analysis 45 (2013) 978-984, DOI 10.1002/sia.5194).
An erratum to this article can be found online at http://dx.doi.org/10.1007/s10008-014-2685-7.
An erratum to this article is available at http://dx.doi.org/10.1007/s10008-014-2685-7.
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Pan, T., Wang, Z. RETRACTED ARTICLE: Investigation of coating delamination on steels by surface topography and Volta potential difference. J Solid State Electrochem 17, 1109–1115 (2013). https://doi.org/10.1007/s10008-012-1972-4
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DOI: https://doi.org/10.1007/s10008-012-1972-4