A STUDY OF THE EFFECT OF VELOCITY ON CORROSION OF GALVANIC COUPLES IN SEAWATER USING A CIRCLING-FOIL APPARATUS

A unique apparatus has been developed to study velocity effects on corrosion processes, and has been used initially to expose single metals and galvanic couples of some common marine structural materials in synthetic seawater electrolyte, under controlled hydrodynamic conditions at various relative velocities. The sample-holder in the apparatus has a standard foil profile, with a turbulence trip wire at the leading edge. Direct determinations of turbulence intensity, boundary layer thickness, and surface shear stress were made at various velocities, enabling correlations of hydrodynamic models with electrochemical data and other observations of corrosion behavior. The effects of velocity and potential distribution on average corrosion rates, and on the mode and distribution of corrosive attack and corrosion products, have been studied. (Author)

• Corporate Authors:

  Naval Postgraduate School

  1 University Circle
  Monterey, CA  United States  93943
• Authors:
  • Perkins, J
  • Graham, K J
  • Storm, G
  • LOCKE, J
  • Cummings, J R
• Publication Date: 1977-12

Media Info

• Pagination: 36 p.

Subject/Index Terms

• TRT Terms: Alloys; Carbon steel; Copper alloys; Corrosion; Corrosion tests; Electrochemistry; Electrolytes; Equipment tests; Galvanic corrosion; Hydrodynamics; Nickel alloys; Seawater; Shear stress; Ship structural components; Testing equipment; Turbulence; Velocity
• Uncontrolled Terms: Laboratory equipment
• Old TRIS Terms: Alloy corrosion behavior; Test equipment; Velocity effects (Corrosion)
• Subject Areas: Hydraulics and Hydrology; Marine Transportation;

Filing Info

• Accession Number: 00174769
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NPS-69PS-77-004 Tech Rpt.
• Files: TRIS
• Created Date: Apr 26 1978 12:00AM