Paint Removal Using Cryogenic Processes
Abstract
The use of a high-pressure jet of cryogenic fluid (e.g., liquid nitrogen at -320 deg F) to remove paint and other protective coatings from Navy aircraft and ships was studied. The objective of the work was to explore the feasibility of developing a paint removal method that is less harmful to the environment than the chemical paint stripping methods presently in use. It was learned that only thick (t >0.020 inch) films of paint can be effectively removed by the mechanism of thermal shock. Aircraft paint is too thin and flexible to be removed by cryogenic methods. Cryogenic methods are not recommended for use on ships because of the danger of steel embrittlement by low temperatures. It was demonstrated that a jet of liquid nitrogen can effectively remove certain paints (regardless of thickness) by the mechanism of differential thermal contraction. The process may have application where control of paint waste is essential, for example, removal of thick films of lead base paint.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1992
- Accession Number
- ADA247668
Entities
People
- Philip L. Stone
- Richard E. Kirts
Organizations
- Naval Facilities Engineering Service Center