Volume 5, Issue 17 (10-2015)
مهندسی خوردگی 2015, 5(17): 0-0 |
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Early detection of epoxy coated St-37 underlying corrosion by fluorescent indicator. مهندسی خوردگی 2015; 5 (17)
URL: http://journal.ica.ir/article-1-151-en.html
URL: http://journal.ica.ir/article-1-151-en.html
Abstract: (300 Views)
In the present work, the application of 8-hydroxyquinoline (8-HQ) as a ferric ion sensitive indicator, in epoxypolyamine coating was investigated. Having turn-on mechanism and showing no prematurely fluorescence when mixed with the coating precursors make 8HQ useful for detecting undercoating corrosion of St-37 which is covered by epoxy coating. The effect of different concentrations of 8HQ(0.05,0.1,0.5,1w.t%) in epoxy coating, on corrosion detection, optical, electrochemical and adhesion properties of applied coating were studied respectively by fluorescence microscopy, UV- Visible spectroscopy, electrochemical impedance spectroscopy and Pull-off methods. In the process, the sample with 0.1w.t% of 8HQ not only, showed acceptable corrosion detection performance, but also was good in optical, electrochemical and adhesion properties.
Keywords: 8-hydroxyquinoline, Corrosion indicator, Epoxy coating, Fluorescence microscope, Electrochemical Impedance Spectroscopy
Type of Study: Research |
Subject:
General
Received: 2022/11/26 | Accepted: 2015/10/2 | Published: 2015/10/2
Received: 2022/11/26 | Accepted: 2015/10/2 | Published: 2015/10/2
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