Scanning Kelvin Probe assessment of steel corrosion protection by marine paints containing Zn-rich primer
Autor: | Dominique Thierry, Nathalie Le Bozec, Andrej Nazarov |
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Rok vydání: | 2018 |
Předmět: |
Kelvin probe force microscope
Materials science Scanning electron microscope 020209 energy General Chemical Engineering Organic Chemistry Metallurgy chemistry.chemical_element 02 engineering and technology Substrate (electronics) Zinc 021001 nanoscience & nanotechnology Surfaces Coatings and Films Cathodic protection Corrosion Total thickness chemistry 0202 electrical engineering electronic engineering information engineering Materials Chemistry Degradation (geology) 0210 nano-technology |
Zdroj: | Progress in Organic Coatings. 125:61-72 |
ISSN: | 0300-9440 |
Popis: | Zinc rich primers provide corrosion protection of steel constructions under heavy corrosive conditions such as offshore environments. In general, the paint contains different polymeric layers including the zinc-rich primer with a total thickness larger than 00 μm that significantly delays the degradation of the paint and the observation of corrosion failures. For prediction of corrosion failure and a quick ranking of paint systems, a new sensitive and non-invasive method for assessment has to be developed. Two commercial coatings with different corrosion protection ability were selected for the study. Scanning Kelvin Probe (SKP) was used to determine the sacrificial protection of steel by multilayer paint systems containing zinc rich primer during exposure to accelerated corrosion tests under atmospheric or under immersed conditions. Scanning Electron Microscopy - Energy Dispersive X-Ray Spectrometer (SEM-EDX) techniques were applied to analyse the cross sections after exposure. It is shown that SKP could quickly access the level of cathodic protection of the steel substrate underneath of industrial thick marine paints. |
Databáze: | OpenAIRE |
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