Accession Number:

ADA508829

Title:

Performance Evaluation of CPCs Using Corrosion Sensors - Laboratory and Field Studies

Descriptive Note:

Briefing charts

Corporate Author:

SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s):

Report Date:

2009-02-04

Pagination or Media Count:

31.0

Abstract:

SUMMARY 1 It was determined that impedance based coating degradation sensors can be successfully used to detect coating failure and assess the performance of CPCs in coastal environments. 2 Laboratory tests showed that the changes associated with coating failure are more pronounced at lower measurement frequencies. 3 The sensitivity of the sensor was found to be dependent on the performance of the CPC better sensitivity was found in case of better performing CPCs. 4 The changes in impedance parameters measured during the wet part of the exposure cycle were found to correlate well with visual observations of surface corrosion. In some cases, recovery of the impedance values during the dry part of the cycle was observed.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE