Abstract
A high capacity versatile trailing platinum-clad anode has been developed and tested. When trailed behind the stern of a moving ship, a uniform polarization pattern was achieved at speeds up to nine knots. Uniform polarization also was achieved with the ship at rest and the anode in a remote position.
The current requirements for the ship polarized between —0.80 and —0.85 volt (to silver-silver chloride) ranged from 5 amperes at rest to 15 amperes at 9 knots. The current requirements under velocity conditions were higher for the unpolarized hull than for the hull pre-polarized at rest.
The driving voltage versus current output of the anode was determined for a range up to 47 amperes. The measured remote resistance of the anode to the hull (ground) was found to be in substantial agreement with calculated values.
The paper discusses the advantages of the trailing anode over existing hull-mounted anode systems, and speculates as to its future possibilities in the marine field. 8.9.5.
