A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings
The aim of the study was to exemplify the benefits of using electrochemical impedance spectroscopy (EIS) for quantification of coating quality during accelerated corrosion testing before the appearance of visual changes on the surface of the coating. The study included an innovative application of t...
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| Format: | Article |
| Language: | English |
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Slovenian Chemical Society
2019-12-01
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| Series: | Acta Chimica Slovenica |
| Subjects: | |
| Online Access: | https://journals.matheo.si/index.php/ACSi/article/view/5113 |
| _version_ | 1818081754785775616 |
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| author | Marina Mrda Lalic Sanja Martinez |
| author_facet | Marina Mrda Lalic Sanja Martinez |
| author_sort | Marina Mrda Lalic |
| collection | DOAJ |
| description | The aim of the study was to exemplify the benefits of using electrochemical impedance spectroscopy (EIS) for quantification of coating quality during accelerated corrosion testing before the appearance of visual changes on the surface of the coating. The study included an innovative application of the commercial flexible gel electrodes in a two-electrode setup for following the impedance of the two high-durability offshore coating systems exposed to 1440 h of neutral salt spray (NSS) according to EN ISO 9227. The results were compared to those of the EIS measurements during 8000 h long exposure to a liquid electrolyte in a press-on cell according to the established EN ISO 16773 method. Complementary methods of differential scanning calorimetry, Fourier transform infrared spectroscopy and thermogravimetric analysis have been used for surface, interface and depth profiling of coating characteristics that were commented with respect to the EIS results.
The technique was applied on high-durability coatings Zn (R) + EP + EP or PUR intended for the protection in the coastal and offshore areas corresponding to C5- (H) and CX corrosivity categories in accordance with EN ISO 12944. EIS has been found to give sound quantitative results for coating impedance and a good estimation of long term coating behaviour within the first 100 h of accelerated exposure. It can be considered a promising tool for the early detection of coating damage during weathering tests. |
| first_indexed | 2024-12-10T19:11:14Z |
| format | Article |
| id | doaj.art-4b6b51a92484427cae1e803914f9e938 |
| institution | Directory Open Access Journal |
| issn | 1318-0207 1580-3155 |
| language | English |
| last_indexed | 2024-12-10T19:11:14Z |
| publishDate | 2019-12-01 |
| publisher | Slovenian Chemical Society |
| record_format | Article |
| series | Acta Chimica Slovenica |
| spelling | doaj.art-4b6b51a92484427cae1e803914f9e9382022-12-22T01:36:44ZengSlovenian Chemical SocietyActa Chimica Slovenica1318-02071580-31552019-12-0166491392210.17344/acsi.2019.5113740A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability CoatingsMarina Mrda Lalic0Sanja Martinez1Koncar Power Transformers Ltd, A Joint Venture of Siemens and Koncar d.d., Josipa Mokrovica 12 , 10000 Zagreb, CroatiaUniversity of Zagreb, Faculty of Chemical Engineering and Technology, Department of Electrochemistry, Savska cesta 16/I, 10000 Zagreb, CroatiaThe aim of the study was to exemplify the benefits of using electrochemical impedance spectroscopy (EIS) for quantification of coating quality during accelerated corrosion testing before the appearance of visual changes on the surface of the coating. The study included an innovative application of the commercial flexible gel electrodes in a two-electrode setup for following the impedance of the two high-durability offshore coating systems exposed to 1440 h of neutral salt spray (NSS) according to EN ISO 9227. The results were compared to those of the EIS measurements during 8000 h long exposure to a liquid electrolyte in a press-on cell according to the established EN ISO 16773 method. Complementary methods of differential scanning calorimetry, Fourier transform infrared spectroscopy and thermogravimetric analysis have been used for surface, interface and depth profiling of coating characteristics that were commented with respect to the EIS results. The technique was applied on high-durability coatings Zn (R) + EP + EP or PUR intended for the protection in the coastal and offshore areas corresponding to C5- (H) and CX corrosivity categories in accordance with EN ISO 12944. EIS has been found to give sound quantitative results for coating impedance and a good estimation of long term coating behaviour within the first 100 h of accelerated exposure. It can be considered a promising tool for the early detection of coating damage during weathering tests.https://journals.matheo.si/index.php/ACSi/article/view/5113durability of coatingseissalt spray chamberorganic coatings degradation |
| spellingShingle | Marina Mrda Lalic Sanja Martinez A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings Acta Chimica Slovenica durability of coatings eis salt spray chamber organic coatings degradation |
| title | A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings |
| title_full | A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings |
| title_fullStr | A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings |
| title_full_unstemmed | A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings |
| title_short | A Novel Application of EIS for Quantitative Coating Quality Assessment During Neutral Salt Spray Testing of High-Durability Coatings |
| title_sort | novel application of eis for quantitative coating quality assessment during neutral salt spray testing of high durability coatings |
| topic | durability of coatings eis salt spray chamber organic coatings degradation |
| url | https://journals.matheo.si/index.php/ACSi/article/view/5113 |
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