A physical scale modelling technique (DACS) has been used to examine the protection of enclosed marine systems, as illustrated by a flooded tube holding an aluminium alloy torpedo. Two experimental tri-metallic systems were employed: a 1/10 linear-scale model and a cell with the correct electrolyte volume/ (cathodic surface area ratio. Three electrolytes were examined; sea water (undiluted and diluted to 1/10 conductivity) and NaCl solution. Decreases in pH are discussed in relation to volume/area ratios and anodic/cathodic reactions but are attributed primarily to the formation of chalking deposits in sea water electrolytes. The DACS technique can be used to study enclosed ICCF configurations by employing a sea water reservoir for flowing systems or NaCl solutions under static conditions. The behaviour of protected materials should be examined in cells which provide the correct volume/area ratio and contain undiluted electrolyte.
Modelling the impressed current cathodic protection of enclosed marine systems
Modellierung des stromführenden Kathodenschutzes von geschlossenen Unterwassersystemen
1989
8 Seiten, 3 Bilder, 2 Tabellen, 5 Quellen
Conference paper
English