Accession Number:

AD0843739

Title:

Water Vapor Diffusion Through Protective Coatings. Part I. A Method of Measuring Water Vapor Permeability of Coating Films by Radioisotope Tracer Technique and its Application

Descriptive Note:

Technical note

Corporate Author:

NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s):

• Matsui, E. S.

Report Date:

1968-10-01

Pagination or Media Count:

43.0

Abstract:

A method of measuring the permeability constant and the diffusion rate of water vapor through a polymer film by the radiochemical method is elaborated. It demonstrates that the radiochemical method, as compared to the ASTM Standard Method, is precise, sensitive and rapid. The radiochemical method is also useful in the investigation of other parameters which influence permeability of water vapor.

Descriptors:

• *PLASTIC COATINGS
• DIFFUSION
• FILMS
• MEASUREMENT
• NONDESTRUCTIVE TESTING
• PERMEABILITY
• POLYMERS
• RADIOACTIVE ISOTOPES
• TEST METHODS
• WATER VAPOR

Subject Categories:

• Physical Chemistry
• Coatings, Colorants and Finishes

Distribution Statement:

APPROVED FOR PUBLIC RELEASE