Accession Number:

AD0915753

Title:

Zinc-Rich Coatings for Aluminum in Seawater

Descriptive Note:

Technical note

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

Report Date:

1973-08-01

Pagination or Media Count:

60.0

Abstract:

Aluminum 6061-T6 coated test panels were prepared for exposure in the harbor water at Port Hueneme, California. Surface preparation of most of the panels was by a light sandblast before application of selected coatings but one series was merely washed clean with water and then with mineral spirits, and another was treated with Alodine 1200S before the coatings were applied. Zinc- rich primers of various types were used, topcoated with epoxy vinyl or coal-tar epoxy systems. After three years of exposure coatings over the Alodine 1200S gave good to excellent protection comparable to that over the zinc inorganic silicates. The topcoated zinc-rich organic primers were slightly inferior to the zinc inorganic silicates. Several coating systems gave excellent protection during the three years of harbor exposure and indicated a protective potential for several years more.

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE