Cathodic protection is one of the primary methods considered by designers and operators to protect internal surfaces within the immersed portion of offshore monopile foundations. There is an industry need to better understand the use of cathodic protection inside offshore monopile foundations.

A laboratory study was conducted to explore several aspects related to internal corrosion and cathodic protection of offshore monopile steel structures. Electrochemical and immersion corrosion tests were performed on structural steel in ASTM D1141 simulated seawater and a variety of temperature, aeration, and pH conditions in order to establish fundamental trends. The effect of these parameters on free corrosion rates, cathodic protection, acidification, and hydrogen gas generation were measured. The impacts of slight chromium additions and different sacrificial anode compositions were also explored.

Subject
Test methods, Water, Materials, Galvanic anodes, Composition, Cathodic protection, Corrosion rate, Zinc anodes, Hydrogen gas, Acidification, Acidity, Steel, Immersion
Keywords:
Monopile, Cathodic Protection, Offshore, Corrosion, pH, Seawater, Sacrificial Anode, Wind Energy
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2023
Association for Materials Protection and Performance (AMPP)
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