MIL-PRF-23236D
b. For one panel, remove all previously applied coatings (and corrosion products) at the "X" scribe mark by
power tool cleaning to bare metal to achieve a SSPC SP-11 surface and feather the interface edges between the bare
metal and intact paint. Create an area of at least 12 square inches. This is intended to simulate repair of a damaged
area in a bilge coating.
c. For the remaining panel, clean, degrease, remove any rust spots, lightly abrade with 100-grit sandpaper to
break any remaining gloss, and finally solvent clean the panel. Again, create a test area of at least 12 square inches.
d. Apply to the prepared areas of the test panels the proposed bilge coating in the number of coats and with
the procedure recommended by the coating manufacturer.
e. Reimmerse the two panels thus prepared into the desired test medium for twelve test cycles or until prior
failure.
f. Following the twelve test cycles, remove the two panels from the immersion test and examine for
compliance with 3.20. Bilge coating systems exhibiting delamination, blisters larger than 1.5 millimeters, rust
breakthrough, or any other coating failure compromising the substrate shall be considered a failure.
4.5.19 Single coat systems. Class 18 single coat systems shall be tested to the requirements of Class 5, 6, 7, 8,
9, 10, and 12 as requested in the manufacturer's application for qualification testing. The difference shall be in
panel preparation. Class 12 coatings shall be applied in a single coat in accordance with the manufacturer's
instructions.
4.5.20 Well deck overhead coating systems (Class19). The evaluation procedure for well deck overhead
coating systems shall consist of the following steps:
a. Two panels prepared as specified in 4.5.2 shall be coated with the well deck overhead coating system and
cured for 30 days at an outdoor exposure site where the minimum ambient daytime temperature is 70 °F and
minimum relative humidity is 50 percent.
b. Each panel shall be exposed to a burn test where the panel is mounted at a 45-degree angle and a butane
torch (or equal) heats the panel backside, which is uncoated. Temperature is measured on the bare uncoated
backside (at the flame contact point) and on the front in the same general area as the flame contact on the back. The
temperature at which the coating ignites is recorded. At that time the torch is removed and the coating is allowed to
burn out. The time and temperature when the coating self extinguishes is recorded.
c. The heating sequence shall be for two hours at each of the temperatures in 50 °F increments from 150 to
500 °F inclusive.
d. Adhesion values in pounds per square inch shall be determined and recorded before and after the heat
resistance test.
e.
Check for compliance with 3.23.
4.5.21 Service life. NAVSEA will coordinate application of Class 7 and Class 19 coatings based upon
available Navy personnel to observe application and ship availabilities. Test coatings must be applied in
accordance with current published Navy process instructions and any unique manufacturer's instructions. After
one year service arrange for Navy inspection and check for compliance with 3.24.
4.6 Toxicity. The contractor shall have the formulations and associated toxicological information available for
review by the Navy Environmental Health Center (NEHC) as directed by the qualifying activity.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When actual packaging of materiel is to be performed by DoD personnel, these personnel need to
contact the responsible packaging activity to ascertain requisite packaging requirements. Packaging requirements
are maintained by the Inventory Control Point's packaging activity within the Military Department or Defense
Agency, or within the Military Department's System Command. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
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