Investigation of blister formed on coated mild steel using scanning Kelvin Probe
The degradation of a coated metal in term of the area underneath a blister has been studied after being immersed in 3% sodium chlorida and 3% ammonium chloride solution. Scanning Kelvin probe (SKP) was used to map electrochemical potentials, identifying anodic and cathodic regions underneath a blist...
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| Main Authors: | , |
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| Format: | Article |
| Published: |
Penerbit UTM Press
2011
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/45007/ |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | The degradation of a coated metal in term of the area underneath a blister has been studied after being immersed in 3% sodium chlorida and 3% ammonium chloride solution. Scanning Kelvin probe (SKP) was used to map electrochemical potentials, identifying anodic and cathodic regions underneath a blister and the surrounding coating. For blisters formed on coated panel immersed in sodium chlorida solution, SKP potential map reveals that the blister has formed at a cathode due to alkali but anodes form nearby (not remote). Meanwhile SKP potential map for blister formed on coated panel in 3% ammonium chloride reveals the presence of cathodic regions within the anodic areas. |
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