M&M PLATING INC.

OUR FINISHES :

Zinc-Nickel Alloy Plating :

 High corrosion protection without topcoats or organic finishes makes it ideal for parts where thread and recess fill are a concern. Around four times the hardness and therefore wear resistance of standard Zinc plating. Many of these features make Zinc-Nickel and environmentally friendly alternative for Cadmium Plating Cadmium plating Provides Superior Corrosion Resistance – protects the base metal for over 1000 hours to red rust. Withstands High Temperatures – can be used for automotive components that are exposed to higher temperatures Economical – provides much better corrosion resistance for any steel part intended for exterior use than comparably-priced conventional zinc.

Zinc electroplating :

Is a soft, ductile, decorative, corrosion-resistant finish. Unlike most other commonly plated metals, zinc protects the substrate. The protection is accomplished by sacrificing itself. The zinc corrodes before the base metal thereby protecting the base metal. For additional corrosion protection, chromates are applied over the zinc. Chromates used in the zinc electroplating process become a component of the coating. Chromate films are typically very thin, and the chromate coating provides no measurable thickness to the overall coating.

 Passivation :

Is the chemical treatment of a stainless steel surface with a mild oxidant such as a nitric acid or citric acid solution. This is typically done to remove any foreign material from the surface of the metal which enhances the corrosion resistance of the stainless steel surface and accelerates the re-formation of the passive layer. Used with orthodontic, orthopedic and surgical equipment as well as by industrial, marine and aircraft manufacturers. Additional passivation applications include high purity water storage tanks, manifolds and pipe spools.

Pickling (Chemical Descaling) :

 Is typically used to remove oxide layers resulting from welding, heat-treating, and other high temperature operations. All of these oxide layers are generally referred to as "scale" and must be removed prior to Electropolishing or Passivating. Pickling is sometimes referred to as "Acid Washing" or "White Acid Pickling".

Black Oxide : 

The coating is a dark aluminum-oxide layer that can adhere tightly to metal. This coating is used for a variety of practical and decorative purposes.
Screws, nuts and bolts are often given a black oxide coating to increase their abrasion resistance and give them a darker appearance.
Black oxide coating can be used to finish mechanical components because it provides a high temperature resistance and doesn't chip or flake easily. It also does not increase the thickness of the parts, allowing them to function properly 

 Phosphate coatings :

Are often used to provide corrosion resistance, however, phosphate coatings on their own do not provide this because the coating is porous. Therefore, oil or other sealers are used to achieve corrosion resistance. This coating is called a phosphate and oil (P&O) coating. Zinc and manganese coatings are used to help break in components subject to wear and help prevent galling.

Most phosphate coatings serve as a surface preparation for further coating and/or painting, a function it performs effectively with excellent adhesion and electric isolation. The porosity allows the additional materials to seep into the phosphate coating and become mechanically interlocked after drying. The dielectric nature will electrically isolate anodic and cathodic areas on the surface of the part, minimizing underfilm corrosion that sometimes occurs at the interface of the paint/coating and the substrate.

Electroless Nickel :

Electroless nickel plating is an auto-catalytic reaction used to deposit a coating of nickel on a substrate. Unlike electroplating, it is not necessary to pass an electric current through the solution to form a deposit. This plating technique is to prevent corrosion and wear. EN techniques can also be used to manufacture composite coatings by suspending powder in the bath.

Electroless nickel plating has several advantages versus electroplating. Free from flux-density and power supply issues, it provides an even deposit regardless of workpiece geometry, and with the proper pre-plate catalyst, can deposit on non-conductive surfaces.