M&M PLATING INC.
TORONTO,ONTARIO.CANADA
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.
Zinc-Iron Plating:
Zinc-iron plating is one of several zinc-based alloy finishes that have gained in popularity in recent years—particularly in the automotive industry. It is an alloy plating consisting of 99+% zinc metal along with <1% iron. This alloy composition can produce corrosion protection results that are superior to traditional zinc plating. Zinc-iron plating is used solely for engineering and functional applications due to its less than desirable appearance. Its main use is to improve the corrosion resistance of steel parts. When applied, zinc-iron works as a sacrificial coating to prolong the life of the basis metal. The corrosion protection of zinc-iron plating can also be enhanced through a variety of chromate and seal post dip applications.
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
Cadmium :
Cadmium plating is still widely used in some applications such as aerospace fasteners and it remains in military and aviation specs.Cadmium plating (or "cad plating") offers a long list of technical advantages such as excellent corrosion resistance even at relatively low thickness and in salt atmospheres, softness and malleability, freedom from sticky and/or bulky corrosion products, galvanic compatibility with aluminum, freedom from stick-slip thus allowing reliable torquing of plated threads, can be dyed to many colors and clear, has good lubricity and solderability, and works well either as a final finish or as a paint base.[2][4] If environmental concerns matter, in most aspects cadmium plating can be directly replaced with gold plating as it shares most of the material properties - gold is more expensive and cannot serve as a paint base.
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.
Bright Dip On Brass :
Brass Bright Dipping is a two step immersion process used to remove surface corrosion or tarnishing from solid brass parts. The process is often used as a pretreatment to painting or followed by a clear coat in order to prevent future tarnishing.
The brass parts must first be thoroughly cleaned to remove all surface oils and grime that are present. Any oil present will cause the bright dipping process to be uneven.
The second step of the process involves a very strong acid dip to remove the corrosion and brighten the brass. The timing of this step is critical as too little will result in an uneven finish and too much will result in removal of too much brass metal from the parts.
100 BARBADOS BLVD. SCARBOROUGH,ONTARIO
M1J 1K9
TEL : 416-267-5811 FAX : 416-267-2461
TORONTO,ONTARIO.CANADA.