INCH-POUND
YT-c:49&
AMENDMENT 2
June 29 19%
SUPERSEDING
This amendment,
dated March 18.
AMENDMENT1
30 June 19S7
FEDERAL SPECIFICATION’4
CLEANINGMETHODS FOR FDRROUS SURFACES
AND PRETREATNZNTSFOR ORGANIC COATINGS
which forms a part of Federal SpecificationTT-C-450C,
1985 is aDDrovedby the Commissioner,FederalSupply
Services,General-Service~-Adminis~ration,for the use‘ofall ‘-
Federal agenciea.
PAGE 1
Paragraph1.2.2 - delete entire paragraphcnd rewriteit aa follows:
“l.2.2 Chemicalconversionand pretreatmentcoatingsshall be of the
following types a9 specifiedbelow (eee 6.4).
Type I -
Zinc phosphate epray application (150 mg/sq ft min - 500 ng/eq
ft max)
Zinc
phosphate immersion or dip application(300 mg/sq ft rain-
500 ng/eq ft max)
Type II
- Aqueous iron phosphate(35 mg/aq ft m.in)
Type III -
Organic pretreatmentcoating (wash pretreatment,unless
otherwisespecified)
Type IV -
Non-aqueous iron phosphate (35
mG/Bq ft rein]
Type V - Zinc phosphate (5Kl mg/aq ft rein)”
Add the followingnew paragraph:
“1,2.2.1 Method of application.
New design d0cument8,engineering
drawingaand orderingdata ehall indicate the t e of coating requiredand
Y“
method of applicationwhen applicable(see 6.17 .
AMSC N/#. laf6
ARE4 MFFP
DISTRIBUTIONSTATEMENTA Approvedfor public releaae;distributionunlimited.
Downloaded from http://www.everyspec.com
