TORONTO AEROSPACE FINISHING INC.

Hard Chrome                    Zinc                                       Tin

Zinc-Nickel                        Electroless Nickel                  Alodine

Cadminum                        Zinc Phosphate                     Chemical Conversion Coating

Black Oxide                      Bright Dipping                       Pickling

Passivation                       Baking                                   Nickel Sulfamate

Chromic Anodizing           Hard Anodizing                     Clear Sulphuric Anodizing

Phosphate                         Salt Spray Test                     Bright Chrome   

Hard chrome plating offers increased life and superior resistance to wear, friction and corrosion because of its excellent lubricity properties. Typically used as an industrial process, hard chrome is an electrolytic plating process used to deposit chrome onto alloys. Hard chrome can either be deposited as a finished product to print, or part of a repair to be ground to a finished size.
Hydraulics, molds, valves, bearings, pumps, cylinders and moving parts found in OEM equipment manufacturing and production use hard chrome to repair, retrofit and extend equipment life. The aircraft, medical, mining, agricultural and chemical industries rely on hard chrome to maximize their investments.


Electroless Nickel is a high corrosion resistance process designed to produce semi-bright deposits for engineering applications where uniformity of coating is important. Additional functions include rust prevention, electrical contact and decorative looks. This process features excellent stability and produces nickel deposits which are smooth with no buildup on the edges or ends. Suitable for use on many different substrates including steel, stainless steel, cast iron, copper and copper alloys, titanium, beryllium, nickel alloys and aluminum.
The Electroless Nickel process is most often used with complex shapes and large size components.

                             

Sulfamate nickel is an extremely useful plating that possesses many beneficial properties. Deposited electrolitically, sulfamate nickel is a uniform dense coating of pure nickel. It provides excellent corrosion resistance, high ductility and strength, and good thermal and electrical conductivity. It can be plated on a wide variety of substrates including chilled irons, various steel alloys, stainless steels, aluminum alloys, copper and brass.
Sulfamate nickel is used in engineering applications as a low cost, machinable build-up coating for size restoration resurfacing defective shells. It is also used as a sealer coating in the Chemical and Food processing industries to prevent iron or other metal contamination.



Black Oxide provides enhanced corrosion protection and aesthetic appeal. It is a chemical process used as a rust inhibitor with steel, stainless steel, iron, copper and brass. There is no increase in dimensions during application and the result is a nice, dark black finish.

                                                                          

Type I Chromic Anodizing Film produced is solid, thinner (0.02-0.05 MIL), darker in color, and is harder than sulfuric acid films of the same thickness.
50% penetration in the substrate / 50% growth over original dimension of part
Favored if there is a possibility of solution entrapment in joints, recesses, and/or weldments.
Chromic Acid leaves no corrosive residue

Type II Sulphuric Anodizing Favored for applications where hardness & resistance to erosion is required
Film produced are of greater thickness (0.1-1.0 MIL)
67% penetration in substrate / 33% growth over original dimension of parts
Its permeable nature prior to sealing is used in the production of color surface finishes on aluminum & its alloys.
Porous aluminum oxide absorbs dyes well & sealing helps prevent color loss in service, although color-fast, they tend to bleach under continued direct sunlight.
Colors offered are: Black , Red , Blue , Green, Yellow (Gold)

 
Type III Hard-anodizing is used for technical purposes: against corrosion and wear, for electrical insulation, and, by impregnating the surfaces with teflon particles, for achieving low friction. This oxide coating can be harder than case hardened steel and provide excellent abrasion resistance; it is protective to the aluminum part and can be very durable.
The thickness of the hard anodize piece can be very closely controlled and be applied to a wide variety of parts to suit applications from many industries. Secondary treatments such as colored dyes are available.

Tin Plating Provides: Bright Tin plating gives a bright 'white' metallic finish with excellent conductivity, and its main use is in the electrical sector. It's other key properties are that is it solderable, ductile, and has a natural lubricity. It is also non-toxic which makes it suitable for human contact and food industry applications.

                                 

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".