Accession Number:

ADA229012

Title:

Electrochemical Impedance of Organic Coated Steel; Final Report. Correlation of Impedance Parameters with Long-Term Coating Performance

Descriptive Note:

Research and development rept.

Corporate Author:

DAVID TAYLOR RESEARCH CENTER BETHESDA MD SHIP MATERIALS ENGINEERING DEPT

Personal Author(s):

Report Date:

1990-09-01

Pagination or Media Count:

46.0

Abstract:

This final report presents a general overview of the use of Electrochemical Impedance Spectroscopy EIS as it applies to the evaluation of organic coated steels exposed to aerated, artificial ASTM sea water. The testing was performed over roughly a 6-year span with some samples subjected to immersion testing for up to 4 years. Three project reports have been previously issued covering a the initial test efforts, b a summary style literature search on the use of EIS and coated metals, and c an experimental correlation of the EIS parameters with the first 550 days of sample exposure in ASTM sea water. The data from the latter report have been critically reviewed, supplemented with data from the continued testing of the same sample set and have been reanalyzed using a modified equivalent electrical circuit. JS

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE