| PROCESS/
(Metal) |
APPLICATION
SPECIFICATION |
NORMAL
COATING THICKNESS & COLOR |
REMARKS |
| BAKING
(all metals)
(Hydrogen embritflement
or stressrelidf)
|
Inaccordance
with applicable plating specification |
|
General
specifications may require this operation before and /or after processing
for hydrogen embrittlement relief, improved adhesion, or hardness,
slight staining may result. |
| BRASS
(on all metals)
|
NONE |
.0002-.0005
Matte to lustrous
|
Normally
preceded by bright nickle plate and post treated with a coat of clear
lecquer or baked enamel. |
| BRIGHT
DIPS (on aluminum,brass, copper) |
NONE |
Remove
Metal |
Clean
for welding, pressure test, or spotwelding improves appearance of
aluminium, brass and copper after processing. |
| CHROMIUM
(all metal) |
QQ-C-320
 |
CLASS
I - Decorative |
|
TYPE
I - Bright |
|
TYPE
II - Satin |
|
CLASS
1 - orative .00001 - .00005 (plus under plate)
CLASS 2 - Engineering .002
unless otherwise specified
|
Decorative
chrome is normally applied over copper and nickel plate. Hard chrome
is plated directly to the basis metal. Parts requiring heavy deposits
should be overplated and ground to the finished dimension. |
| CHROME
PICKLE (on magnesium) |
See
Dow #1 |
---- |
|
| CHROMIC
ACID Touch Up (on magnesium) |
See
Dow #19 |
---- |
|
| COPPER
(on all major metals) |
MIL-C-14550 |
|
CLASS
0 - .001- .005 |
|
CLASS
1 -.001 |
|
CLASS
2 -.0005 |
|
CLASS
3 - .0002 |
|
CLASS
4 - 0001 |
|
Stop
off for carburizing, shielding for brazing. As an undercoat for other
plating, increase electrical conductivity to prevent base metal migration
into tin (prevents poisoning solderability). |
| DEGREASING
(on all metals) |
TT-C-490 |
---- |
Although
degreasing will remove oils, grease, etc., it will not always remove
solids, additional cleaning may be necessary. |
| ELECTROLESS
NICKLE (on all types of metals) |
MIL-C-26074
|
CLASS
I-As coated no heat treat |
|
CLASS
II- Metals not adversly affected by heat treat |
|
CLASS
III- Aluminium not heat treatable and beryllium alloys |
|
CLASS
IV- Heat treatable aluminium alloys |
|
|
GRADE
A- .0001 min. |
|
GRADE
B- .0005 min. |
|
GRADE
C- .0015 |
|
100
percent uniformity of plate thickness on all accesible internal and
external areas. Exceptionally good for salvage purpose. Heat treatment
at 500'f for one hour, should result in coastings with a Vickers hardness
of 850 = 150 for class 2 applications. Note: class 2 coating should
be applied to those allcys which would be affected by this heat conditioning. |
| GOLD
on all types of metals |
MIL-G-45204
|
TYPE
I-99.7% gold |
|
TYPE
II-99.0% gold |
|
TYPE
III-00.9% gold |
|
|
CLASS
OO-.00002 |
|
CLASS
0-.00003 |
|
CLASS
1-.00005 |
|
CLASS
2-.0001 |
|
CLASS
3-.0002 |
|
CLASS
4-.0003 |
|
CLASS
5-.0005 |
|
CLASS
6-.0015 |
Matle to bright yellow ro
orange dependent on thickness and surface finish.
|
Good
solderability and corrosion resistence. Normally used over nickel
or silver base. Consult military specification for Proper class for
intended use. Improve tarnish resistance. |
| NICKLE
on all metals
(Electodeposited)
|
QQ-N-290
CLASS 1- Corrosion Protective
CLASS 2 - Engineering plating
to specified thickness and dimensions
(See sulfamate Nickle)
|
CLASS
1
|
GRADE
A .0016 |
|
GRADE
B .0012 |
|
GRADE
C .001 |
|
GRADE
D .0008 |
|
GRADE
E .0006 |
|
GRADE
F .0004 |
|
GRADE
G .0002 |
CLASS 2 as specified
|
There
is a nickle finish for almost any need. Nickle can be deposited soft
or hard, dull or bright. Corrosion resistance is related to thickness
applied. Low co-efficient or thermal expansion. Slightly magnetic.
Class 2 plating thickness will be .003 unless otherwise specified,
but may be controlled to fit any engineering application.
Note:Class I coating that
include copper undercoat are used for decorative chromium systems.
|
| PAINTING
on all metals |
As
specified (MIL-F-14072 may be consulted for references) |
Thickness
as specified Colors per FED-STD-595 |
Our
facilities include hammertone, wrinkles, enamels, epoxys, urethanes,
poly-vinyls, zinc chromate, etc. |
| POLISHING
on all metals
|
NONE |
Removes
metal.
Satin to bright
|
Decorative
applications. Removes surface imperfections. Bright or satin finishes. |
| RHODIUM
on all metals |
MIL-R-46085 |
|
CLASS
1 - .000002 min. |
|
CLASS
2 - .00001 min. |
|
CLASS
3 - .00002 min. |
|
CLASS
4 - .00010 min. |
|
CLASS
5 - .00025 min. |
|
Excellent
abrasion resistance. Good electrical concuctivity. Hard as chromium.
Will not tarnish. Excellent wear in contact areas. |
| SANDBLAST
on all metals
(Includes Vaporblast, Glass
Bead, Liquid Hone)
|
MIL-SL177726 |
Removes
metal |
For
removing scale and rust, etc., and blending imperfections. Amount
of metal removed will depend on media selected. May be used for decorative
and optical finishers. Provides uniform matle finish before decorative
processing. |
| *SILK
SCREEN PRINTING on all metals |
AS
SPECIFIED |
|
An
excellent mens to label parts for identification and information. |
| SILVER
on all metals |
QQ-5-365
|
TYPE
I - Matle |
|
TYPE
II - Semi-Bright |
|
TYPE
III - Bright |
GRADE A - With supplementary
tranish resistant treatment
GRADE B- Without supplementary
tranish resistant treatment
|
.0005
unless otherwise specified |
Excellent
conductivity. Application of light water dip lacquer or chromate treatment
per Grade A does not impair solderability. Greatly increases conductivity
of lesser metals. An attractive decorative finish, particularly when
base metal polished or satined. |
| SOLDER
PLATE on all metals |
MIL-P-81728 |
.0003
- .0005 unless otherwise specified |
60/40
tin-lead alloy plating. Excellent solderability. Should not be used
on part of irregular configuration or with deep recesses. This process
is also available for wire and strip. |
| TIN
(all metal) |
MIL-T-10727
|
Type
I -Electrodeposited |
|
Type
II- Hot dipped |
|
Type
I-No thickness is specified. Suggested thicknesses are:
|
.0001-.00025
for soldering. |
|
.0002-.0004
to prevent galling or seizing |
|
.0002-.0006
to prevent formation of case during nitriding. |
Type II- No thickness is
specified. Average will be approximately .0005 Gray to semi-bright
|
Excellent
solderability with fair corrosion resistance. Oxides on Type I must
be removed before soldering or parts must be protected by lacquer
or similar finish immediately after plating. Type I parts may be fused
but thickness will vary after treatment. A maximum of .0002 must be
maintained to permit satisfactory fusing. Fused tin is not covered
in this specification. This process is also available for wire and
strip. |
| TIN
- Bright (on all metals) |
MIL-T-10727 |
.0001-.0005 |
Also
known as acid tin plating. Good solderability. Excellent shelf life. |
| ZINC
(on all metals) |
QQ-Z-325
|
Type
I- without supplementary chromate treatment |
|
Type
II- with supplementary chromate treatment |
|
Type
III- with supplementary phosphate treatment |
|
CLASS
1-.001
CLASS 2- .0005
CLASS 3- .0002
|
Gives
galvanic protection to base metal. Untreated (Type I) zinc does not
maintain its bright surface for a very long period of time. Weather
exposure will change zinc to a dull gray. |
