ELECTRICAL PROPERTIES OF COATINGS AS RELATED TO PERFORMANCE. II. EXPERIMENTS WITH SEVEN ADDITIONAL IMMERSED COATING SYSTEMS
Abstract
Seven coating systems on steel panels were immersed in salt water for up to nearly two years. AC and DC electrical properties of the coatings were determined and were compared with the performance of the coatings in the laboratory, in shallow water, and in the deep ocean. Four of the systems showed comparatively little deterioration, and these coatings maintained high AC and DC resistances. Two systems which showed greater deterioration in exposure to sea water had high resistances initially, but subsequently developed lower AC and DC resistances. One system, consisting only of inorganic coatings was very conductive and its electrical properties thus could not be related to performance. Long term performance data for correlation with electrical measurements are not yet available. No definite relationship between dissipation factors of the coating systems and performance could be established, nor could a relationship between water permeability and performance be established.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 10, 1967
- Accession Number
- AD0816474
Entities
People
- Peter J. Hearst
Organizations
- Naval Facilities Engineering Service Center