A-A-002544
April 23, 1987
COMMERCIAL ITEM DESCRIPTION
COATING, RUST PREVENTATIVE FOR INACTIVE FLEET SHIPS
This interim commercial item description was developed by NAVSEA 070R (C.P.E.C- Norfolk Naval Shipyard, Portsmouth, VA), based on currently available technical information. It is recommended that Federal Agencies use it in procurement and forward recommendations for change to the preparing activity at the address shown above.
This coating covered by this purchase description is intended for use on inactive fleet ships and boats in marine environments.
SALIENT CHARACTERISTICS:
General. The coating shall be readily dispersible by hand stirring to uniform condition and shall be compatible with odorless mineral spirits. The coating shall brush and spray easily when thinned nor more than 15% by volume with mineral spirits thinner and shall be capable of being applied at a wet film thickness of 10 mils. The dried film shall be free of brush marks, sags, runs, pinholes and other defects when applied to a dry thickness of 1.5 mm (0.006 in). The film shall dry smooth and have a uniform appearance.
Color. The color shall be an approximate match to FED-STD-595 color number 27880 or 26270 as specified (ASTM D 1729).
Adhesion. The coating shall tightly adhere to aged alkyd coatings and aged rust preventative coatings when the surface has been prepared by water blast cleaning and/or detergent washing. The coating shall dry to a soft non-brittle film.
Water resistance. The enamel shall show no blistering or wrinkling after 24 hours immersion in distilled water (ASTM D 1308). Twenty-four hours after removal, the test film shall be equal in hardness, adhesion, general appearance to the unexposed panel, and shall retain a minimum of 90 percent of the initial 60o gloss (ASTM D 523).
Accelerated Weathering. After weathering 500 hours using fluorescent UV-condensation accelerated weathering apparatus (ASTM G 53) and an exposure cycle of 240 minutes light at 60oC followed by 240 minutes condensation without light at 50oC, the test film shall meet the following requirements:
|
Requirement |
Limits |
Test Method |
|
Chalking |
Slight |
ASTM D 659 |
|
60O gloss, percent of original retained |
25 min. |
ASTM D 523 |
Salt Spray (Fog) Testing. After 1000 hours (ASTM B 1417) the sample shall show no rusting or undercutting when evaluated in accordance with ASTM D 610.
Non-volatile Vehicle. The nonvolatile vehicle shall be a phenolic resin modified with an inorganic corrosion inhibitor.
Pigment. The pigment shall be titanium dioxide, type IV, ASTM D 476, and suitable color pigments for gray color. The Coating shall contain no aluminum materials.
Volatile. The volatile shall not be photochemically reactive as defined in Rule 102 of SCAQMD.
|
QUANTITIVE REQUIREMENTS |
LIMITS |
ASTM TEST METHOD |
|
|
|
Min |
Max |
|
|
60o gloss (5 Mil Dry Film- 72 hour dry) |
--- |
10 |
D 523 |
|
Consistency, K.U |
100 |
120 |
D 562 |
|
Fineness of grind (Hegman) |
2 |
--- |
D 1210 |
|
Dry time, set-to-touch, hours (5 mil dry film) |
--- |
2 |
D 1640 |
|
Dry time, dry-hard, hours (5 mil dry film) |
--- |
24 |
D 1640 |
|
Sag resistance |
10 |
--- |
D 4400 |
|
Density, Weight per gallon, lbs |
10.0 |
--- |
D 1475 |
|
Volatile Content, percent by weight |
22 |
30 |
D 2369 |
|
Nonvolatile, percent by volume |
59 |
--- |
D 2697 |
|
Flash point, oF |
100 |
--- |
D 3278 |
|
Contrast ratio (at 5 mil dry film thickness) |
1.00 |
--- |
D 2805 |
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