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Within a few weeks in a 2012 cathodic protection (CP) trial for monopiled windturbine structures in the North Sea, the seawater pH inside the monopile dropped from 8 to 5 and toxic gas (H2S and CO) alarms were energised. This paper explains why.
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Seawater pH inside an offshore wind turbine monopole had changed from pH 8 to less than pH 5. And toxic gas alarms were energised. This paper discusses a theory why the pHdropped and solutions to overcome the low pH with the use of aluminium anodes.