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MIL-STD-171E.018877.pdf
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MIL-STD-171E.018877.pdf
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I
NOTE The docutnentidentifiersnd headinghas
changed on thispage toreflectthatthisisa
maimfacturingprocessstandard.There sreno
other
(
changes to this
document.The doeurnentidentifier
on subsequentpages hssnot been changed,butwill
be changed thenexttime thisdoeurnentisrevised
E&&Y-J
MIL-STD-171E
23JUNE 1989
SUPERSEDING
MIL-STD-171D
29 FEBRUARY 1980
DEPARTMENT OF DEFENSE
MANUFACTURING PROCESS
STANDARD
FINISHING OF METAL AND WOOD
SURFACES
I
I
(
AMSC N/A
AREA MFFP
I
DISTRIBUTION STATEMENT A. Approved for public release; distribution is urtlisnited.
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MIL-STD-171E
B
-.~
DEPASTHENT OP DEFENSE
..
Washington, DC 20301
)
Finishing
of netal and Wood Surfacea
HIL-STD-171E
1.
Tlris Military Standard is approved for use by all Departments and
Agencies of the Department of Defense.
2. Beneficial comments (recommendations, additiona, deletions ) and any
pertinent data which may be of use in improving this document should be
addressed to:
Director, U.S. Army Laboratory Command, Waterials Technology
Laboratory, ATTN:
SLCt4T-t4EE,Watertown, MA 02172-0001 by using the
Standardization Document Improvement Proposal (DD Form 1426) appearing at the
end of this document or by letter.
“1
ii
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FIIL-sTD-171E
FORSWORD
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The purpose of this standard is to establish finish system codes which
link or cross reference specific specification information for finishing and
otherwise treating metal and wood surfacea.
It also serves aa a general guide
to the selection of suitable finishing materiala, procedures, and systems. It
covers both organic (paint, varnish, and the like) and inorganic (metal plate,
phosphatized metal, and the like) c0atin9s.
Specialized systems peculiar to
individual agencies are covered by drawings, apecif ications and standards
published by those organizations and supplement this standard. Such
procurement documents should make direct reference to the applicable
specification. For example, FIIL-STD-194 covers painting and other finishing
of fire-control materiel.
Finish system code numbers in the tables shall not
be changed in future revisions
of this standard, inaamuch as those code
numbers should be referenced on drawings, in contracts and in end item
specifications. where a system in a previous edition of MIL-sTD-171 has been
deleted from the revision, the system to be used as a substitute is noted in
the tables.
For convenience in referencing, all procedures, whether they merely clean
a
surface, deposit a film, or perform some other desirable function, are
cataloged as “finishes”.
As an example of how to use this standard, aasume a part is to be
finished with chromated zinc plate 0.001 inch (25 um) thick.
Turning to table
II, Inorganic Finishes, Plating, we find the designation for this finish to be
1.9.2.1. Hence, the instructions on the drawing would be:
Finish 1.9.2.1 of HIL-sTD-171.
In this particular case, it is unnecessary to mention any preliminary steps
such as cleaning, because ASTM B633, Coatings of Zinc on Iron and Steel Zinc
Plating Elect redeposited referenced in finish 1.9.2.1, provides for this step
in these words “It (the basis metal) shall be subjected to such cleaning,
pickling, and plating procedures aa are necessary to yield deposits as
hereinafter specified”.
Again, assume the hood of a truck is to be finished with olive drab
lustreless lacquer. According to table XIII, this finish is SyateM 20.4.
Assume the preparation for painting to be phosphating (finish 5.1.1). The
primer would be one conforming to MIL-P-11414 or TT-P-664.
The finishing coat
would be a lacquer conforming to MIL-L-11195. Sence the instructions on the
drawing would be:
Finish 5.1.1 plus 20.4 of MIL-STD-171, Olive Drab No. 34087.
If circumstances make it desirable that parts of an assembly be primed
separately and be given final coats after assembly, the instructions might be:
i
I
Finish 5.1.1 plus 20.4 of MIL-STD-171, Olive Drab No. 340S7
primed before assembly.
iii
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MIL-STD-171E
The subject matter of this standard is arranged in sections as prescribed
in MIL-STD-962 as follows:
)
..
1.
Scope; 2.
Referenced Documents; 3.
Definitions; 4.
General
Requirements; 5.
Detail Requirements: and an additional section
6.
Sotes on Inspection.
Section 6 on inspection presumes that the peints have been laboratory
tested against the appropriate products specification prior to application.
However,, inspection to assure that the painting operations are carried out
properly is as important as the quality of the paint itself.
For exemple,
inspection of surface preparation prior to painting is
of major importance.
M excellent paint on an improperly prepared surface may fail prematurely.
Again, the thickness of a paint coat has a direct bearing on its durability.
Thus, tbe correct thickness
of the dry film of “wash primer” (DOD-P-1532S ) as
given in this standard ia very important.
In addition to these two factors,
proper mixing and thinning of the paint, suitable weather at time of painting,
uniform application, suitable drying time between coata, and proper handling
of painted surfaces, must be carefully observed.
Admittedly this type of
inspection requires sound judgment derived from long experience.
Compliance with this standard will promote uniformity in the painting and
other finishing of military equipment, and will lessen the chances of error
and confusion in times of emergency.
The net result
protection of military meteriel from, deterioration.
should be improvsd
..
.)
iv
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MIL-STD-171E
(
PM/AGRAPH
1.
1.1
1.2
1.3
2.
2.1
2.2
3.
4.
4.1
4.1.1
4.2
4.3
4.3.1
4.4
4.5
4.6
4.7
4.7.1
4.7.1.1
4.8
4.9
4.10
4.11
4.12
5.
5.1
5.1.1
5.1.1.1
5.1.1.2
5.1.2
5.1.3
5.1.4
5.1.4.1
5.1.4 .1.1
5.1.4.2
5.1.4.3
5.1.4.4
5.1.4.5
5.1.4.6
5.1.4.7
5.1.4.8
5.1.4.9
CONTENTS
PAGE
SCOPE
............................... .............. ..........
Scope .....................................................
Selection of finishin9 system ....... .............. ........
Conflicts
.................................................
REFERENCED DOCUMENTS ........................................
Government documents ......................................
Non-Government publications ............................. ..
DEFINITIONS (Not applicable )
..................................
GENERAL REQUIREMENTS
........................................
Materials .................................................
Applicable documents ......................................
Substitution for specified finishes, processes, or
materials .............................................
Preparation and cleaning of surfaces ......................
Castings ............ ............. .........................
Drainage of processing solutions frOm paKtS
...............
Holes and recesses ........................................
Rivets, lock bolts, blind rivets and threaded fasteners ...
Compatibility of dissimilar metal couplings
...............
Reduction of corrosion at intermetallic contact points ....
Vinyl tape ....................... ......... ................
Organic vapor, acid or alkaline environment
...............
Surfaces not to be painted ................................
Dressing operations .......................................
Use of steel wool .........................................
Welding, soldering and brazing ............................
DETAIL REQUIREMENTS ........
Inorganic finishes .......
Metallic coatings ........
Stress relief of ferrous a:
Embrittlement relief .....
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
loy
............................
.............. ..................
Conversion coatings .......................................
Black oxide finishes ......................................
Metal treatments, other than metal deposition or
black oxide ...................................... .....
Steel, noncorrosion resistant .............................
Surface treatments for noncorrosion resistant steel .......
Steel, corrosion resistant
................................
Zinc and cadmium ..........................................
Aluminum and aluminum allOy ...............................
Flagnesium alloy ...........................................
Copper and copper alloy
.............. ................... ..
Terneplate ....................... ............. ............
Tin .......................................................
Titanium and titanium alloy .......... ............... ......
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