CONTINUOUS WET VS CYCLIC WET-DRY SALT IMMERSION RESULTS FOR SCRIBED COATED STEEL PANELS

Most accelerated aging tests for coatings subject coated panels to either a continuous wet or a cyclic wet-dry exposure. Proponents of cyclic exposures have long argued that cyclic exposures provide more realistic results, in that they better simulate outdoor weathering conditions and produce failure modes which closely resemble those observed outdoors. To test out this premise, two sets of nominally identical oil-alkyd coated steel panels containing a prominent defect were exposed to either continuous wet or cyclic wet-dry immersion in a 5% NaCl solution. It was concluded that, for the experimental coating system, continuous wet immersion was a more severe exposure than cyclic wet-dry immersion and that the failure mechanisms underlying degradation in both exposures appear to be identical.

• Supplemental Notes:
  • J. Coatings Technology, 61 (1989), p.39 (May) [10 pp., 43 ref., 3 tab., 8 fig.]
• Authors:
  • Martin, J W
  • McKnight, M E
• Publication Date: 1989

Language

• English

Subject/Index Terms

• TRT Terms: Coatings; Tests
• Uncontrolled Terms: Marine environment
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00695565
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM