all offshore wind turbines are founded on steel structures, each typically
weighting around 1000t. These structures are severely subjected to fatigue loading
and since fatigue resistance is highly reduced by corrosion the structures are
protected against corrosion and the main corrosion protection of these
structures is cathodic protection. Usually cathodic protection was provided by
galvanic anodes (GACP) but due to cost reduction, restrictions to design and
pollution from emission of metal ions cathodic protection is now increasingly
being established from impressed current systems (ICCP).
methods for design of especially ICCP systems for offshore Wind structures are
poorly documented leading to overly conservative designs or to not-calculable
risk of protection failure which makes corrosion protection by cathodic
protection and especially ICCP systems more expensive and less attractive.
Thereby cost for offshore wind energy increases and reduced possibility for
reducing pollution from metal ions released by sacrificial anodes. By establishing
satisfactory design methods for offshore cathodic protection systems offshore
wind energy will become more attractive which will reduce global impact from
power production and be beneficial to the large Danish offshore industry.
In the pdf-file four detailed project
descriptions are presented.
In collaboration withRamboll, Consulting company
DTU Courses 11561 and 11562