Process Specs

INDUSTRY STANDARDS FOR METAL PLATING & POLISHING

PROCESS SPECIFICATION

FIND 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

PROCESS AND APPLICABLE SPECIFICATIONS

PROCESS/ (Metal)	APPLICATION SPECIFICATION	NORMAL COATING THICKNESS & COLOR	REMARKS
BAKING (all metals) (Hydrogen embritflement or stress relief)	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)		.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)		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)	As specified (MIL-F-14072 may be consulted for references)	Thickness as specified Colors per FED-STD-595 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 TType 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.