GALVANIC CORROSION OF CUNI-SHEATHED STEEL PILINGS IN SEAWATER

This paper presents the results of a study conducted to determine the extent of galvanic corrosion that would be caused by copper-nickel sheathing of offshore steel platforms. The study investigated the effects of selected steel-to-CuNi area ratios on the magnitude and distribution of the galvanic current. One year seawater exposure tests utilising segmented CuNi-steel pilings were carried out near Ocean City, New Jersey. The results of the study suggest that, for piling configurations and lengths of copper-nickel sheathing similar to those included in the study, the maximum galvanic corrosion rate of the steel will be between 0.2 and 0.3 mm/y, immediately next to the sheathing. The galvanic attach will be confined primarily to the first few meters of piling near to the sheathing. Beyond this, the intensity of galvanic attach will decline markedly.

• Supplemental Notes:
  • OTC 91, 23rd Annual Offshore Technology Conf; 6-9 May 1991; Houston, Tx, USA. Procs. Vol 2, Ppr OTC 6589, p 253 [8 p, 2 tab, 7 fig]
• Authors:
  • Ellor, J A
  • Gehring, G A
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Copper; Copper alloys; Corrosion; Galvanic corrosion; Nickel alloys; Seawater; Sheathing; Steel structures
• Candidate Terms: Seawater corrosion
• Subject Areas: Bridges and other structures; Marine Transportation;

Filing Info

• Accession Number: 00701345
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM