Clear Zinc Coating

Zinc plus clear trivalent chromate plus sealant lubricant part suffix lz.

Clear zinc coating. The chromate coating acts as paint does protecting the zinc from white corrosion thus making the part considerably more durable depending on the chromate layer s thickness. Zinc plating in general can be broken into two primary steps. Crc clear zinc is an easy to use long lasting high performance protective clear coating that can be applied to almost any surface. Zinc coating is usually thin ranging up to 1 mil 25 µm.

The normal zinc plated coating is dull gray in color with a matte finish. Clear zinc plating essentially does mean colorless or transparent and is essentially a color choice which shows the natural metallic color of the zinc coating. I am trying to persuade our engineering department to allow us to make the switch to have our hardware clear zinc plated. Citation needed the protective effect of chromate coatings on zinc is indicated by color progressing from clear blue to yellow gold olive drab and black.

Steel parts requiring embrittlement relief after plating are baked according to industry. Yellow zinc plating vs. Thus hardness can range from 150 1500 vickers. What is clear zinc plating.

The dilemma clear zinc silver zinc or yellow zinc plating. The first step is to add the zinc plating through the use of electrical current. Astm b633 sc1 type iii plus a lubricated topcoat scope this specification covers electrodeposited zinc coatings as applied to steel copper brass and bronze parts to protect them from corrosion. Zincsexcellent corrosion resistance in most environments accounts for its successful use as a protective coating on a variety of products and in many exposure conditions.

Coating for steel copper copper alloys zinc and zinc alloys. Nickel can be deposited soft or hard dull or bright depending upon process used and conditions employed in plating. The coating is entirely pure zinc which has a hardness about one third to one half that of most steels. This generally restricts zinc plated parts to very mild exposures.

Crc clear zinc s advanced protective coating technology protects surfaces from chemical environmental and ultraviolet damage preventing rust oxidation corrosion staining and fading for up to 27 months. Zinc a natural healthy and abundant element was first used in construction in 79 ad zinc metal has a number of characteristics that make it a well suited corrosion protective coating for iron and steel products. The reason for the high hardness of zinc diffusion coatings is not clear. Zinc coatings are usually made passive after plating with a conversion coating to enhance the corrosion protection of a newly formed coating against the formation of white rust which is a loose layer of zinc hydroxide and carbonate.

When we were deciding what color zinc coating to use for our non powdercoated steel parts that are going to see moisture and salt we were asked whether we wanted to use silver clear zinc or yellow zinc.