| Download | - View final version: Distribution of steady-state cathodic currents underneath a disbonded coating (PDF, 898 KiB)
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| Author | Search for: Brousseau, R. J.1; Search for: Qian, S. Y.2 |
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| Affiliation | - National Research Council of Canada
- National Research Council of Canada. NRC Institute for Research in Construction
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| Format | Text, Article |
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| Subject | Buildings |
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| Abstract | Pipeline corrosion frequently persists underneath disbanded coatings on pipelines that appear to be well protected cathodically. Application of higher cathodic potentials for improved protection may produce hydrogen gas (H2) bubbles that block current flow underneath a disbanded coating. A project was undertaken to determine whether an increase in applied potential results in higher polarization levels on the crevice should increase. Steady-state cathodic protection experiments were performed at three applied potentials in an electrochemical cell simulating the crevice steel under a disbanded coating. The recorded profiles showed that higher levels of protection underneath a disbanded coating could be achieved by applying higher cathodic potentials. Penetration of the cathodic currents underneath a disbanded coating also was more difficult in higher resistivity solutions. |
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| Publication date | 1994-12-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | IRC-P-3158 |
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| NRC number | NRCC 35525
NRC-IRC-3859 |
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| NPARC number | 20375425 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 6de8d471-a94c-4980-bf7d-7f4b5f83c97e |
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| Record created | 2012-07-23 |
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| Record modified | 2020-06-06 |
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