MIL-PRF-23236D
3.4.7 Immersion resistance(Class 9). When tested in accordance with 4.5.2.3, the total coating system shall
show no pinhole rusting, cracking, or loss of adhesion either between coats or to the substrate. There shall be no
blisters rated in excess of ASTM D714, blister size number 4, Few. There shall be no surface imperfections
(including peeling) larger than 1.5 millimeters (0.0625 inch) and any blisters shall be unbroken. Type VII coating
system shall have no edge rusting. Blisters and surface imperfections smaller than 1.5 millimeters (0.0625 inch) that
do not increase in size after the tenth cycle and do not exceed 3 percent of the test panel surface area shall not be
considered failures. At the completion of the test, adhesion of the recoat to the original coating shall be at least 50
percent of the original coating area of the test panel to itself. Type VII edge rusting shall not exceed 0.1 percent of
total edge length. Physical damage caused by handling shall be identified and may be ignored in the post-test
condition evaluation.
3.5 Cathodic protection (CP) compatibility (all types, all classes except 14, all grades). When tested as
specified in accordance with 4.5.16, the coating system shall not peel, flake, blister, dissolve, or otherwise fail.
Undercutting or peeling shall not exceed 4 percent of the area of the test panel and all undercutting and peeling shall
be located within ½ inch of the holiday.
3.6 Drying or curing time (all types, all classes, all grades). When tested in accordance with the procedures of
table V, each individual coating of the coating system shall require not greater than 23 hours between coats for
recoating and shall be ready for service within 7 days after the application of the last coat. Application and cure
shall be at the temperature specified by the manufacturer. In the absence of manufacturer's guidance, the
temperature selected shall be at the low end of the temperature range.
3.7 Flash point (all types except VIII and VIIIa, all classes, all grades). When tested in accordance with the
procedures of table V, each individual coating of the coating system mixed for use shall not flash at temperatures
lower than 38 C (100 F).
3.8 Application characteristics (all types except VIII and VIIIa, all classes, all grades). When tested as
specified in 4.5.7 and 4.5.8, each individual coating of the coating system shall be readily applied by brushing (touch
up areas only), rolling, and spraying, using commercially available equipment specified by the manufacturer's data
sheet. The coatings shall exhibit leveling without sagging when applied at the film thickness recommended by the
manufacturer. Manufacturer's product data sheets shall state at which temperature it will be necessary to use plural
component spray equipment in order to achieve an acceptable surface appearance. Apply Types VIII and VIIIa in
accordance with manufacturer's instructions.
3.8.1 Edge coverage retention (Type VII, all classes, all grades). When tested as specified in 4.5.9, the retained
percent dry film thickness (DFT) of coating on any single 90-degree outside edge test specimen shall not be less
than 50 percent of the paint DFT on flat areas. The average coating (percent) retained on a 90-degree outside edge
of no less than three specimens shall be an average minimum of 70 percent of the measured dry film thickness on
the flat areas of the test specimen. There shall be no pin holes, cracks, or other defects along the edge that extend
more than 10 percent into the thickness of the coating on the edge. No defect shall extend completely to the metal of
the test specimen. The edge coverage retention applies to the topcoat only and not to the primer.
3.8.2 Sag resistance (all types, all classes, all grades). When tested in accordance with the ASTM Test Method
cited in table V, sag resistance shall comply with the value submitted by the manufacturer (see 3.12).
3.9 Immersion resistance (all types, all grades). Any coating system failure prior to the completion of all class
specific immersion cycles (see 4.5.2) shall constitute failure of the coating system to meet the requirements of this
specification.
3.9.1 Class 5 (fuel and seawater). When tested as specified in 4.5.2.1, the total coating system shall show no
pinhole rusting, cracking, or loss of adhesion either between coats or to the substrate. There shall be no blisters
rated in excess of ASTM D714, blister size number 4, Few. There shall be no surface imperfections (including
peeling) larger than 1.5 millimeters (0.0625 inch) and any blisters shall be unbroken. Type VII coating system shall
have no edge rusting. Blisters and surface imperfections smaller than 1.5 millimeters (0.0625 inch), which do not
increase in size after the tenth cycle and that do not exceed 3 percent of the test panel surface area, shall not be
considered failures. At the completion of the test, adhesion of the recoat to the original coating shall be at least 50
percent of the original coating area of the test panel to itself. Physical damage caused by handling shall be identified
and may be ignored in the post-test condition evaluation.
12
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business