Omni Metal Finishing provides anodizing services for conventional Type I, IB and II anodic coatings that are intended to improve surface corrosion protection under severe service conditions or as a base for paints.
Anodizing processing include:
Aluminum Sulfuric Anodizing: Aluminum alloys are anodized to increase corrosion resistance, to increase surface hardness, and to allow dyeing (coloring), improved lubrication, or improved adhesion.
Phosphoric Acid for Aluminum Alloys: Anodizing can be carried out in phosphoric acid, usually as a surface preparation for adhesives. This is described in standard ASTM D3933
Titanium Anodizing: It generates an array of different colors without dyes, ...
Conversion coatings on aluminum are coatings for metals where the part surface is converted into the coating with a chemical or electro-chemical process. Examples include chromate conversion, phosphate conversion coatings and oxide coatings on steel and titanium. These processes are used for:
Corrosion protection
Increased surface hardness
Added decorative color
Good base for Primers and Paints
Conversion coatings may be very thin, on the order of 0.00001".
Fluoride Phosphate for Titanium: This process establishes the engineering requirements for producing chemical conversion coatings on titanium alloys and the properties of the coating. Flouride phosphate for titanium has been used ...
Omni Metal Finishing offers magnesium dichromate treatment for DOW #1, DOW #7, DOW #15, DOW #19 and conversion coatings on titanium alloys and zinc die cast. The magnesium dichromate treatments are applicable to all magnesium alloys and mainly used for protecting magnesium during shipment, storage and machining.
Common applications include:
Paint bases
When close tolerance parts (camera part, etc.) require optical properties (black)
Laboratory / Non-destructive tests (NDT): Those forms of testing that do not result in permanent damage or deformation to the part being tested, good to detect different defects such as cracking and corrosion. Typical examples are magnetic crack detection and Fluorescent Penetrant Inspection.
Magnetic Particle Inspection: An inspection method special for detection of cracks, seams, voids, pits, subsurface holes, and other surface, or slightly subsurface, discontinuities in ferro-magnetic materials.
Fluorescent Penetrant Inspection: The process of using a tool to find defects, flaws, and leaks in a material. A penetrant inspection will show the presence, location, size, and nature of the defects ...
Cadmium: The cadmium plating is smooth, adherent, uniform in appearance, free from blisters, pits, nodules, burning, and other defects when examined visually without magnification. Supplementary treatment for Type II can be golden, iridescent, amber, black, olive drab, or clear. Cadmium plating provides an enhanced corrosion resistance of the coating, especially with the Type II finish.
Copper Plating: This is a process in which a layer of copper is deposited on the item to be plated by using an electric current. With a higher current, hydrogen bubbles will form on the item to be plated, leaving surface imperfections. Often various other chemicals are added to improve plating uniformity and brightness. Without some ...
Prime: a preparation for top coat or paint. Some metals require a primer (such as un-treated aluminum) while others may not. A primer designed for metal is still highly recommended if a part is to be exposed to moisture. Once water seeps through to the bare metal, oxidation will begin (plain steel will simply rust). Metal primers may contain additional materials to protect against corrosion, such as sacrificial zinc.
Paint: a substance used as a coating to protect or decorate a surface (especially a mixture of pigment suspended in a liquid); dries to form a hard coating. Painting and gluing aluminum is especially important in the aircraft industry, which uses toxic zinc chromate primers and chromating to add the ...
Solid Film Lubrication is commonly used where components have to be removed repeatedly from inaccessible areas and in applications where extreme heat and cold can breakdown conventional lubricants, such as oil or grease. The dry film lubricants establish the requirements for three types of heat cured solid film lubricant that is intended to reduce wear and prevent galling, corrosion, and seizure of metals.
Unlike conventional lubricants, this coating does not attract foreign particles, such as dirt or metal, making it ideal for operations where cleanliness is a concern. In addition, dry film lubricants are used in high load applications where a permanent lubricant is required to reduce friction and wear.
Electroless nickel coatings are typically used to provide a uniform external and internal buildup on intricate shapes for improved resistance to wear and corrosion and enhancement of solderability on or for selected materials.
The electroless nickel coating can withstand service environments up to 1000 °F (540 °C), although the coating's effectiveness may degrade as service temperature increases. The coatings provide a good resistance to:
Omni Metal Finishing specializes in passivation for improved corrosion resistance of parts made from austenitic, ferritic and martensitic corrosion-resistant steels of the 200, 300 and 400 series and precipitation hardened corrosion-resistant steels; 440C grades may be exempt from passivation treatments at the discretion of the procuring activity.
The passivation process involves citric and nitric chemical treatments that remove iron or sulfuric contaminants and forms a uniform, protective chromium-oxide film. The thin, transparent film prevents oxidation of the material surface that may form in high humidity environments. Since material is not removed from the part, passivation maintains the dimensional integrity of close ...
Chemical Finish Black: A uniform black corrosion retardant for copper and copper alloys. The coatings have no abrasion resistance and are commonly used for:
Gloss reduction purposes on copper-alloys surfaces other than food service and water supply items
A base for subsequent coatings such as lacquer, varnish, oil, and wax
Black oxide coatings provide a uniform black coating for steel and stainless steel materials. The coatings have a very limited corrosion protection under mild corrosion conditions and should be used in low light reflection and decorative applications.
Black oxide coatings should normally be given a supplementary treatment such as oil displacement or protective treatments.
Omni Metal Finishing, Inc. 11665
Coley River Circle, Fountain Valley, CA
92708 • Tel:
888-268-5270 • Fax: 714.540.5635
