TS-631 COATINGS EVALUATION AND MAINTENANCE Flashcards
__________ - Exterior coatings normally gather dirt and become increasingly soiled.
(Types of deterioration and failure)
Soiling
Where is the TS-631 Coatings Evaluation and Maintenance Manual located?
SFLC page - quick links - SFLC Directives Library - Technical Standards - TS-631.
________- glossy paints lose their gloss and eventually turn flat with age. This is a sign of initial breakdown of the vehicle at the surface of the paint.
(Types of deterioration and failure)
Flatting
_________- is the result of weathering of the paint at the surface of the coating. The vehicle is broken down by sunlight and other destructive influences, leaving loose, powdery pigment at the surface that can easily be rubbed off with the fingers.
(Types of deterioration and failures)
Chalking
________________- describes breaks in the paint film, formed as the paint becomes hard and brittle.
(Types of deterioration and failure)
Checking and Cracking
______________- described as tiny breaks that take place only in the upper coat or coats of the paint film without penetrating to the substrate.
Checking
___________- Describes larger and longer breaks that extend through to the substrate.
(Types of deterioration and failure)
Cracking
____________- appears in the paint film when the topcoats lift from the base, leaving the prime coat intact. The condition is most frequently the result of moisture being absorbed by wood.
(Types of deterioration and failure)
Blistering
____________- water-soluble salts which dissolve in moisture carried through the substrate and then crystallize on the exposed surface. (Atmospheric salt residues)
(Types of deterioration and failure)
Efflorescence
What tool is used for removing tight rust, mill scale, and heavy paint coats?
Chipping hammer
_______ and _______ scalers are used for removing rust, mill scale, and oil paint from large metallic and Masonry areas?
Rotary and needle scalers
What is used to remove loose mill scale, old paint, weld flux, slag, and dirt deposits?
Wire brush
_______ and _______ are used for complete removal of old paint, rust or mill scale on small surfaces and for smoothing rush services.
Grinders and sanders
Low pressure water cleaning is performed at pressures less than __________ psi, and is used prior to, or after other surface preparation, cleaning methods to help her move salt and contaminants from the service.
5,000 psi
High pressure water cleaning is performed at pressures from __________ to ___________ psi and is used to remove surface, contaminants, light, marine, fowling, loose, paint, and mild chalking or dusting.
5,000 to 10,000 psi
High-pressure water jetting is performed at pressures __________ to ___________ psi, and is used to remove loose paint, loose rest, and mil scale.
10,000 to 30,000 psi
The use of water at pressures less than 10,000 psi is referred to as water _________.
Cleaning