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.
 

Anodizing is an electrolytic process for producing controlled aluminum oxide films on aluminum.  Oxide forms naturally on untreated aluminum but the anodizing process produces a coating which is uniform, much harder, and more dense than natural oxidation. 

NICKEL PLATING AMS 2403

(NICKEL SULPHOMATE)

The platings precipitated from nickel sulphomate solutions are characterized by low residual stresses. Nickel platings are several millimeters thick, can be easily machined and are predominantly used for repair purposes.

Nickel plating (Ni) is used for decoration and corrosion protection of steel, copper, aluminium and magnesium, for smoothing out surfaces, for black coatings, and for renewing worn machines components. Mostly applied prior to chromium plating.
 

Cadmium platings are used to protect components in non-stainless steels against corrosion. In electrochemically unfavorable material combinations the nobler material is frequently cadmium-plated to prevent contact corrosion.

The process produces a hard, ductile, and uniform deposit that is smooth and free of nodules, blisters. Also our another process about silver is

SILVER PLATING ON ALUMINIUM

Manganese Phosphate is applied chiefly to ferrous parts (Internal combustion engine parts for example) for break-in and to prevent galling and are mostly used as an oil base.

Gold is not only a very good conductor but has excellent corrosion resistance.

Bright, ductile, easily buffed, conductivity (only exceeded by silver), easily machined.

ZINC Plating is widely employed for providing sacrificial protection to steel.  Being electronegative to iron, meaning that the zinc will corrode preferentially to the underlying metal, zinc plating gives excellent corrosion resistance to iron and steel components, particularly in industrial and urban environments.

ZINC Plating provides an attractive finish with a relatively uniform thickness, which does not tend to fill up slots and screws holes or obliterate threads and other fine details of work.  The coating can subsequently be passivated or dyed to further improve corrosion resistance or for part identification.

Our Zinc alloys:
ZINC COBALT PLATING (Zn-Co)

ZINC NICKEL PLATING (Zn-Ni)

ZINC ALKALINE

ZINC IRON PLATING (Zn-Fe)

TIN PLATING (ELECTROLESS AND ELECTROLYTIC ),
COPPER PLATING, CHEMICAL BLACKING ON METALS, CLEANING AND PASSIVATION, PROCESS FOR STAINLESS STEEL, ALODINE
( ALUMINIUM CHROMATE CONVERSION ), ELECTROLESS NICKEL PLATING, TITANIUM CLEANING.