General:
Enclosures and fittings shall be prepared
for finishing, utilizing a five stage dip
process and the coating shall be
electrostatically applied powder in
accordance with the following
specifications.
Factory Painted Finish:
The paint coating shall be dry powder,
electrostatically applied to
produce a finish of 3 to 5 mils thickness.
The coated metal shall then be baked. The coating shall be commercially smooth,
substantially free of flow lines, paint washout, streaks, blisters and other defects that
would impair serviceability or detract from general appearance.
Tests and Certification:
The finish shall be in accordance with following:
Salt Spray Resistance
The undercutting of the film of the coating shall not exceed
1/8" average, from lines scored diagonally and deep enough to expose the base
metal, after 2500 hours exposure in a salt spray cabinet in accordance with ASTM
Designation: B 117.
Adherence - There shall be no coating loss when tested by California Test 645.
Compliance of the coating system to the above requirements may be determined by
the application of the coating, to 4" X 8" X 0.024" test specimens of the same
material as the cabinets, in the same manner as applied to the cabinet. Testing shall
include tape pull and mandrel bend testing in compliance with California Test
Method 645.
A fade and chalk test which shall result in a maximum of 10% deviation from an
original finish measurement when checked by weatherometer and fadeometer.
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