IMPRESSED CURRENT CATHODIC PROTECTION OF ALUMINUM-HULLED CRAFT

Overprotection is a major problem accompanying cathodic protection of aluminumhulled craft. Investigations were conducted concerning the protection and overprotection of aluminum under various conditions of galvanic coupling, seawater velocities and dilutions, dielectric shield materials, lengths of exposure and influence of seawater location. Overprotection was found to occur above 1500 mv, the exact value depending on seawater velocity and other conditions. The corrosion resulting from overprotection was severe, making imperative a protection system design which eliminates the possibility of accidental overprotection. Data is presented which can aid in the design of a reliable protection system.

• Supplemental Notes:
  • Presented at AIAA/SNAME/USN Advanced Marine Vehicles Meeting, Annapolis, Maryland, July 17-19, 1972
• Corporate Authors:

  American Institute of Aeronautics and Astronautics

  1290 Avenue of the Americas
  New York, NY  United States  10019
• Authors:
  • MILLER, B E
  • Hack, H P
• Publication Date: 1972-7

Media Info

• Features: Figures; References; Tables;
• Pagination: 6 p.

Subject/Index Terms

• TRT Terms: Cathodic protection; Corrosion; Corrosion protection; Hulls
• Old TRIS Terms: Hull corrosion
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00035177
• Record Type: Publication
• Source Agency: American Institute of Aeronautics and Astronautics
• Report/Paper Numbers: 72-593
• Files: TRIS
• Created Date: Oct 27 1972 12:00AM