ENCAPSULATION OF CORROSION INHIBITING TWO COMPONENT CURABLE SEALANT.
Abstract
The purpose of this program was to demonstrate the feasibility and merit of encapsulating two component curable sealants, and coating the capsules on fasteners as a means of applying a corrosion inhibiting treatment to the faying areas of fastener holes using standard automatic and hand operated riveting equipment. Liquid polysulfide resins and BaCrO4 pigmented liquid polysulfide resins capsules have been formed possessing 80-88% internal phase and a capsule size range of 105 to 250 microns. Coating techniques and materials were developed for adhering the sealant capsules to the surface of fasteners. A topcoating of acrylic resin was applied to the surface of the adhered capsules to improve their handling characteristics. Dry state permeability tests on capsules indicate excellent shelf-life under varying exposure conditions. A complete environmental, structural movement, thermal, communications and production compatibility testing program has proven that encapsulated polysulfide formulations coated rivets were equal to or superior to ''wet dipped'' zinc chromate primer in all tests. In addition to the polysulfide sealant system, numerous elastomeric epoxy, urethane, and silicone sealant formulations have been screened and evaluated in regards to their encapsulation potential and functionality. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1966
- Accession Number
- AD0480723
Entities
People
- Carl K. Schaab
- James E. Price
- John F. Hanny
- Nicola Marinelli
Organizations
- NCR Corporation