Plating for Electronics, Inc.

PFE Services > Metal Finishing / Laser Marking

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Abrasive Blasting:
Aluminum Oxide and Glass Bead blasting available.

Standard Type II MIL-A-8625, ASTM B 580. Anodizing is an electrolytic process for producing controlled aluminum oxide films on aluminum parts. The aluminum piece is made anodic in a sulfuric acid electrolyte. The resulting anodic coating is much harder, more uniform and far denser than the naturally occurring oxide layer. The finish can be used clear or dyed in a variety of colors including black, optical black, blue, red, gold, orange, green, olive brown (tan) and purple. Custom colors are available. Upon request the parts can then be sealed with hot water or hot nickel acetate solution. Steris resistant seal available upon request.

Type III MIL-A-8625, ASTM B 580. Hardcoat Anodizing is produced in a bath that is much colder and contains organic additives that slow the dissolution of aluminum in relation to the oxide buildup, resulting in a finish that is much harder and denser than standard Type II. Hardcoat is a darker, smoother surface that is even more wear and corrosion resistant than standard anodize. The finish can be used clear or dyed in a variety of colors including black, optical black, blue, red, gold, orange, green, olive brown (tan) and purple. Custom colors are available. Dyed colors also tend to have a darker appearance due to the deeper gray of the layer. Increased corrosion resistance can be obtained by sealing in a 5% sodium dichromate solution.

Masking is the process in which selected areas of a part can be protected from finish. Common areas to mask are threaded or precision holes, electrical or thermal contact points, or any tight tolerance feature. Plating for electronics specializes in parts that require masking. Our experience in this area has enabled us to produce innovative and cost effective masking solutions on the most difficult jobs in our field. Bring us your masking requirements and we will design a custom solution for you.

Black Ebonol:
MIL-F-495. Ebonol is a black oxide finish on copper and copper alloys. Used to increase corrosion resistance, for decorative uses and for inner layer surface bonding in printed circuit board lamination and other bonding applications. Often used in optical applications where a non-reflective surface is required.

Black Oxide/Black Passivate:
MIL-C-13924 Class I. On steel, Black Oxide is a conversion coat provided by a chemical reaction with the iron in the metal to form an integral protective surface. Mostly used for abrasion resistance and decorative purposes.

MIL-C-13924 Class IV. On stainless steel, Black Oxide or Black Passivate provides a uniform black passive layer that is decorative and also enhances its characteristic corrosion resistance.

Bright Dip:
To clean, as well as enhance the appearance of parts made from copper or brass.

MIL-DTL-5541-F ASTM B 449 (formerly MIL-C-5541). Iridite 14-2, Alodine 1200s. Chromic Acid is used to provide a conversion coating on aluminum which offers electrical conductivity, increased corrosion resistance, and a good bonding surface for paint, lacquer, and organic finishes. Available in both clear and yellow.

Trivalent Conversion Coat (formerly MIL-C-5541). Complies with RoHS, WEEE, ELVD. MIL-DTL-81706 B, MIL-DTL-5541 TYPE II. A trivalent chromium conversion treatment for aluminum that provides the comparable benefits of the hexavalent coating but is designed for use where hexavalent chrome is prohibited. Available in clear only.

MIL-C-14550, ASTM B 734. Second only to silver for electrical conductivity, primarily used as an underplate for subsequent deposits as well as a base for black ebonol.

Copper in color, semi-bright to bright finish. Good corrosion resistance when used as an undercoat. A number of copper processes are available, each designed for a specific purpose.

  1. Brightness (decorative).
  2. Fine Grain (for heavy buildup for electroforming, and as a mask for case hardening).

Dow Finishes:
Dow #1, MIL-M-3171-C, Type I: A chrome pickle treatment for magnesium. Color can vary from matte gray to yellow-red. Fair corrosion resistance. Used mainly for protecting magnesium during shipment, storage, and machining. Can be used as a paint base.

Dow #19, MIL-M-3171-C, Type VI: A Dilute Chromic Acid treatment that provides moderate corrosion protection, it's an excellent base for painting. The color varies from a light Brassy color to dark Brown.

Dow #7, MIL-M-3171-C, Type III: A dichromate treatment for magnesium. Color varies from light brown to dark brown to gray depending on the alloy. Good paint base and protective qualities for most magnesium alloys.

ASTM B912. Electropolishing electrolytically removes or diminishes scratches, burrs and unwanted sharp edges from stainless steel. The resulting chrome rich surface is passive and hygienically clean, with superior corrosion resistance. Uses include medical, surgical, marine and aerospace applications.

MIL-G-45204-C, ASTM B 488.

Grade C: Hard, bright gold, purity is 99.7-99.9 %; hardness is 120-200 Knoop. Has high electrical conductivity and low contact resistance. Excellent tarnish and corrosion resistance and good solderability.

Grade A: Soft, pure gold., Purity is 99.7-99.9 %; hardness is 90 Knoop maximum. Increased solderability and conductivity.
Yellow to orange color depending on proprietary process used. Will range from matte to bright finish depending on base metal and finish. Good corrosion resistance and high tarnish resistance. Provides low contact resistance, and is an excellent conductor. Has excellent solderability.

Iridite 8P:
Protective chromate for copper and copper alloys.

Laser Marking:
Plating for Electronics provides high quality in house laser marking services on virtually any material. Laser marking has become the leading choice for part marking due to its economical cost, durability and quick turn around time.

Save valuable production time and added shipping costs by combining laser marking with one of our finishing processes.

Common laser marking includes:
  • Part #
  • Serial #
  • Date Codes
  • Logos
  • Scales
  • Barcodes

Contact us for more info or to request a quote:

Bright Nickel QQ-N-290-A, ASTM B 733. Contains organic components that provide brightness and leveling to the deposit. Excellent resistance to corrosion, strong and durable. Used as an underplate for precious metals, chrome and other deposits as well as for decorative purposes.

Sulfamate Nickel MIL-P-27418, ASTM 2424. Low stress electrolytic deposition with good electrical properties; very ductile. A pure deposit that allows soldering and brazing during assembly. An excellent barrier coat between copper alloys and precious metals.

There is a nickel finish for almost every need. Nickel can be deposited soft or hard-dull or bright, depending on process and conditions used in plating. Hardness ranges from 150-500 Vickers. Can be dull grey or light grey color. Corrosion resistance is a function of thickness. It has a low coefficient of thermal expansion and is magnetic.

Nickel, Electroless:
MIL-C-26074, ASTMB 733.
Medium Phosphorous: 5.0 – 7.0%
Lead and Cadmium Free: RoHS and WEEE compliant, phosphorous 7.5 – 9.0%

Due to the fact that the electroless process is autocatalytic and does not use applied current to produce the deposit, EN deposits are uniform in thickness across various part configurations that might normally be high or low current areas in an electrolytic process. The plater controls thickness precisely by simply monitoring plating time. Electroless nickel finishes provide good lubricity, weldability and solderability with good conductivity and electrical properties. It offers excellent wear resistance, with hardness characteristics varying with phosphorous content. Similar to stainless steel in color. Good corrosion resistance. Medium phosphorous finish is offered, as well as a RoHS compliant process that is lead and cadmium free. Teflon impregnation is available.

AMS QQ-P-35, ASTM A 967, ASTM A 380.
300 and 400 series stainless; Nitric acid and Nitric/Dichromate.
In chemical passivation, free iron and other contaminants are removed from the surface of stainless steel, enhancing its anti-corrosion properties by enabling the formation of a chromium rich, corrosion resistant layer.

In ideal conditions, a protective oxide film forms naturally on the surface of stainless steel. In the machining process, iron from cutting tools as well as shop dirt, grease and lubricants interfere with the formation of this layer. Cleaning and passivation removes these contaminants and maximizes the essential corrosion resistance of stainless steel.

Passivate, Titanium:
ASTM–F-86 is a process that removes imbedded particles and cleans the surface of Titanium.

MIL-R-46085, ASTM B 634. Used over nickel, silver, gold or platinum. Used on silver for tarnish resistance. Excellent corrosion and abrasion resistance. Stable contact resistance and high melting point make it useful in electronic applications. Almost as hard as chromium. Has high reflectivity.

Silver, Bright:
QQS-365, ASTM B 700.

Grade A: Chromate conversion to prevent tarnish.

Grade B: No chromate.

In addition to decorative uses, silver is used in electrical applications due to its superior conductivity and ability to withstand higher current, for electrical connectors and contacts, in telecom, and semiconductor semi-bright to bright appearance. Good corrosion resistance, depending on base metal, but will tarnish easily. Hardness varies from about 90 Brinnell to 135 Brinnell depending on process and plating conditions. Solderability is excellent, but decreases with age. Best electrical conductor. Has an excellent lubricity and smear characteristic for anti-galling uses on seals, bushings, etc.

MIL-T-10727 C, ASTM B 545.

Bright Acid Tin
Matte Tin (RoHS Compliant)

Excellent solderability and ductility, good corrosion resistance. A good electrical conductor used in the electronics industry for connectors, contacts, semi-conductors components, etc.

Tin-Lead, 90/10:
MIL-P-81728 B, ASTM B 579.

Matte finish

Tin is alloyed with lead to prevent tin whiskering. 90/10 alloy provides greater wear resistance than 60/40 alloy and a higher softening temperature to prevent unwanted reflow. Good oxidation resistance.

Vapor Degreasing:

QQ-Z-325-B, ASTM B 633. Bright Zinc plate closely resembles the appearance of bright chromium. Zinc coated steel will not rust even when exposed by scratches because of the galvanic protection of zinc.

The primary use of chromate finishes on zinc is to retard or prevent formation of white corrosion products on zinc surfaces. Chromates offered are yellow, blue-bright (RoHS) or black.

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Plating for Electronics, Inc.
94 Calvary St.
Waltham, MA 02453

781.893.2368 - Phone
781.893.8273 - Fax - Email

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Plating for Electronics has been setting the standard for expertise, technical support and on-time delivery in metal finishing for over 50 years