MCLEOD PLATING
Gold Passivate commonly referred to as yellow or zinc plated.
A yellow plated zinc finish that provides a protective layer, providing a good level of corrosion prevention, as well as further protection due to the passivate addition which provides a yellow or gold finish.
Yellow Zinc (Gold Passivate) is the most common type of zinc plating used in automotive parts finishing. Gold is its colour only - it does not contain actual gold. Of all the zinc types it retains good average level of corrosion resistance
Blue or Clear Zinc (Silver Passivate) has no colour.
It is often referred to as blue as it can result in a blue-ish hue. The passivation of silver is a technical application for freshly silver plated surfaces. It is often achieved by tri-valent based processes which are more environmentally friendly than the hex-valent versions but offers lower corrosion resistant properties.
Black Zinc Plating
Black Zinc Plating refers to the color of the chromate that is applied during the post plating process. It includes a layer of zinc applied to a parts surface followed by black chromate applied over the zinc. Black Zinc is commonly specified for its dark appearance and protective properties.
Zinc phosphate are mainly used for rust proofing on ferrous metals and is a chemical treatment applied to steel parts creating a thin adhering layer of iron.
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Barrel plating is a form of electroplating used for plating a high volume of smaller metal objects. It consists of a non-conductive barrel-shaped cage in which the items are placed before being subjected to the chemical bath in which they become plated. Items include small components such as screws, nuts, bolts and washers. The barrel rotates slowly in the plating solution and offers a cost effective means of plating high volume parts.
Rack plating is a method used to electroplate large and complex parts that are difficult to plate using other processes. The parts are mounted to a fixture or jig known as a "rack" then immersed in a plating solution bath. This method is better for contours and intricate shapes and delicate parts that might not be able to withstand the tumbling action produced by barrel plating. The cost for this process is higher due to the increased labour requirements.