New for 2016: ECO is FFL (Federal Firearm Licensee)
ECO Finishing Company

Zinc Plating

Anodizing Aluminum

Nickel Plating

Electroless Nickel

Copper Plating


Black Oxide

Phosphate Coating

Hard Coat Anodization

Chemical Conversion Coatings

RoHS/REACH Compliance

Phosphate Coating at ECO Finishing

ECO Finishing provides zinc and manganese phosphate coating in Minneapolis that is compliant with DOD-P-16232 F and other standards. With over 60,000 sq ft of clean, well lit space, ECO Finishing has a streamlined process that complies with all EPA regulations regarding safety and waste treatment.

Phosphate coatings can be used on steel, cast iron, aluminum, zinc, cadmium and silver for the purposes of pretreatment prior to coating or painting, increasing corrosion resistance and improving friction properties. Phosphate Coating is a conversion coating, where a dilute solution of phosphoric acid and phosphate salts is applied and chemically reacts with the surface of the part being coated to form a layer of insoluble, crystalline phosphates.

ECO Finishing provides both Manganese and Zinc Phosphate coatings. Manganese phosphate coatings (type M) are used for corrosion protection, anti-galling and lubricity. Manganese phosphate coatings are the hardest and provide unbeatable corrosion and abrasion protection, and are often used as an oil retention coating. The manganese phosphate coating is known for two surface conditions; first: it is crystalline, second: this crystalline structure is crushable. Normally after the Manganese coating is applied, the part is dipped into an oil. The crystalline surface absorbs the oil and when the part is first used, the crystals crush and release the oil, lubricating the entire application. The size of the crystals can be altered through various processes, which in turn releases more or less oil depending on customer requirements. Common applications include bearings, fasteners, bushings and other industrial components.

Zinc phosphate coatings (type Z) are used primarily for rust proofing ferrous metals and as as a base material for subsequent painting. It will provide a smoother finish then manganese phosphate. During the zinc phosphating process the surface of the part is coated with zinc. Zinc is a sacrificial coating, meaning it is corroded before the steel will be corroded. This lends itself well for a paint base, since painters are often striving for extended corrosion resistance.

ECO Finishing provides phosphate coating services to a wide range of industries including automotive, aerospace, medical, military and manufacturers of industrial and consumer products. Our phosphating tank is 3 x 2.5 x 3 allowing us to coat both large and small parts.

ECO Finishing has the fastest lead time of any metal finishing company in Minnesota. We can process within hours, within a day or on your schedule. Our average turn time is two to three days. The goal is to support our customers as they grow their business by beating their competition.

Quality is at the heart of ECO Finishing. Each job is carefully monitored from its arrival through the entire plating process. Inspection of plated parts is enhanced by more than 100 foot candles of light throughout the entire plant. Zinc plated thickness measurements are verified with X-ray fluorescence and our quality system conforms to military specifications as outlined in MIL-Q-45208. ECO uses Statistical Process Control (SPC) to assure that our product meets exacting industry standards.

At ECO Finishing, we believe that our job is to make your life easier! We specialize in Just in Time (JIT) deliveries and fast turnaround orders. We are known by our customers for our commitment and dedication to quality. ECO has the history, experience and professionalism to be sure to make your job easier. Contact ECO Finishing today for phosphate coating services at (763) 574-1000.