The Performance of Selected Marine Coatings Exposed to High Velocity Seawater.

Abstract

A study was undertaken to investigate seawater velocity thresholds and failure modes for three selected marine coatings under non-cavitating, parallel flow ranging from 3 to 30 m/s. The study was accomplished in a flow channel using natural seawater. The results indicate: (1) the velocity threshold for two of the three coatings investigated might exceed 30 m/s (2) blister formation appears to be the critical part of the damage process leading to gross failure (3) under the given set of experimental conditions, hydromechanical wear is negligible (4) electrical impedance measurements enable non-destructive detection of impending coating failure (5) parallel flow is not as damaging as impinging or cavitating flow in the velocity range between 15 and 30 m/s. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1979
Accession Number
ADA069160

Entities

People

  • G. A. Gehring Jr.

Tags

Communities of Interest

  • Advanced Electronics
  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Acquisition
  • Chemistry
  • Data Acquisition
  • Detection
  • Electrical Impedance
  • Electrical Resistance
  • Failure Mode And Effect Analysis
  • Impedance
  • Materials
  • Measurement
  • Ships
  • Stresses
  • Surface Effect Ships
  • Tars
  • Tensile Strength
  • Tensile Stress
  • Two Dimensional

Readers

  • Combustion and Flow Dynamics.
  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.