Coating Galvanized Steel
Abstract
An experiment was conducted to determine the factors that contribute to deterioration on coatings on galvanizing and how to obtain better coating performance. Variables included six surface treatments, two weathering variations, and five chemical compositions. Coating properties measured were initial bonding to galvanizing and salt fog resistance. Significant conclusions were: 1) was h (priming improved both bonding strength of coatings to unweathered galvanizing and salt fog resistance of coatings to both weathered and unweathered galvanizing (no other surface treatment was beneficial), 2) weathering of the galvanizing before coating generally reduced bonding but improved salt fog resistance, 3) the epoxy system performed best of all and did not require wash priming for good performance, and 4) the zinc chromate primer improved salt fog resistance of the alkyd system, but the zinc dust/zinc oxide primer did not.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1989
- Accession Number
- ADA211775
Entities
People
- Richard W. Drisko
Organizations
- Naval Facilities Engineering Service Center