As marine infrastructure and, particularly, petroleum production platforms and pipelines age, cathodic protection system retrofits become necessary in order that corrosion control might continue. An important aspect of such retrofitting is determining when such action should take place. The assessment of cathodic protection systems upon both space frame structures and pipelines is normally performed based upon potential measurements. As galvanic anodes waste, their size decreases; and this, in turn, causes a resistance increase and a corresponding decrease in polarization. In the present research, models have been constructed for the depolarization history that should occur in response to anode depletion for a fixed structure and for a pipeline. Critical issues for such depolarization are discussed with regard to foreseeing and projecting when retrofitting should be performed.
Issues associated with expiration of galvanic anodes on marine structures
Mit dem Ausfall von galvanischen Anoden an Seebauwerken verbundene Probleme
Corrosion, Houston ; 61 , 11 ; 1035-1040
2005
6 Seiten, 8 Bilder, 4 Tabellen, 14 Quellen
Article (Journal)
English
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