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Process Specs

Find here industry standards for various processes:

  • Baking
  • Degreasing
  • Sandblast
  • Brass
  • Electroless Nickel
  • Silver
  • Bright Dips
  • Gold
  • Solder Plate
  • Chromium
  • Nickel (Electrodeposited)
  • Sulfamate Nickel
  • Chrome Pickle
  • Painting
  • Tin
  • Chromic Acid
  • Polishing
  • Tin Bright
  • Copper
  • Rhodium
  • Zinc

 

Applicable Specifications:

PROCESS AND APPLICABLE SPECIFICATIONS

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.