An approach to design of sacrificial anode cathodic protection (CP) systems for marine steel structures was proposed based upon the slope associated with the linear relationship between potential and current density that arises as each of these parameters decays with time. CP design according to the proposed procedure was compared to the current recommended practice, and advantages of the former relative to the latter were reviewed. The new procedure relates to past and present CP design practice, but the proposed technique is first principle-based rather than empirical. The procedure inherently accommodates the rapid polarization approach, which promotes formation of a particulary protective calcareous deposit and establishment of a low-maintenance current density. Calculation of the slope of the linear potential-current density relationship, which characterizes polarization, in conjunction with potential survey data was shown to provide the basis of an improved protocol for defining effectiveness of an existing CP system.
Sacrificial anode cathodic polarization of steel in seawater: Part 2 - Design and data analysis
Kathodische Polarisation von Stahl in Meerwasser durch Opferanoden: Teil 2 - Auslegung und Datenanalyse
Corrosion, Houston ; 54 , 4 ; 317-322
1998
6 Seiten, 8 Bilder, 1 Tabelle, 18 Quellen
Article (Journal)
English
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