Metal Finishing

MIL offers numerous metal finishing processes. These methods improve the surface finish of a material. After finishing, parts may have improved performance in specific environments, abrasion resistance, color dyes, etc.

Anodizing

Chromic, Sulfuric, Boric, Hardcoat
Colors available: Blue, Red, Green, Black, Yellow, Orange, Purple
Materials: 2024, 7075, 6061, A356, MIL-A-8625, AMS 2468, AMS 2469, AMS 2470, AMS 2471, AMS 2472

Chromic Types I, IB, IC
Sulfuric Types II, IIB
Thin Film Surfuric
Hardcoat Type III
Class 2 Multiple Dye Colors

Metal Finishing improves the material’s surface finish.

Cadmium Plating, Rack and Barrel

Used to protect various steel substrates from corrosion
Natural lubricity, electrical conductivity, low contact resistance, good solder ability, and ductility
Thickness ranges are 0.0001” to 0.0006” per surface

Shot Peening

Chromic, Sulfuric, Boric, Hardcoat
Colors available: Blue, Red, Green, Black, Yellow, Orange, Purple
Materials: 2024, 7075, 6061, A356, MIL-A-8625, AMS 2468, AMS 2469, AMS 2470, AMS 2471, AMS 2472

Chromate Conversion Coatings

Clear/Yellow (please specify)
ROHS compliant is available
AMS 2473, MIL-DTL-554L, CIA and CC3

Class 1A and 3
Rohs

Chemical Milling

The chemical removal of base material to a desired size
Removal of decarb (steel), alphacase (Ti), recast layer (EDM surface)
Materials: carbon steels, titanium

Phosphate Zn and Mn

Zinc (TT-C-490), Manganese (DOD-P-16232 Tym)
Surface conditions may require blasting. Surface hardness 39 RC or greater may require stress relief and embrittlement relief bake

Electro Polish

Surface Finish Improvement of microfinish
Materials: all staineless steels

Pickle / Etch

Aggressive surface cleaning and surface preparation

Titanium Cleaning

EDM Recast Layer Removal

Stress / Embrittlement Relief Baking

Passivation

400 Series, PH & 300 Series, and Ti
24-hour humidity testing, Copper Sulfate testing
AMS 2700, AMSQQ – P -35

300 / 400 / PH / High Ni Alloys

Black Oxide

Materials: Carbon Steels (need hardness for bake requirments, some staineless steel)
MIL-DTL-13924 Ty1 & Ty4, AMS 2485

Prepenetrant Etch

Materials: titanium, aluminum, stainless steel
Removal of base material for Fluorescent Penetrant Inspection

Vapor Degreasing

Chemical cleaning process used to remove heavy oils and grease from work pieces.

Abrasive Blasting – Automatic / Manual

Glass Bead
Aluminum Oxide

Ultrasonic Cleaning

Parts may require paint, tape, and plugs to mask areas before processing

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