The most common fastener coatings
There are various things based on which the performance of the fasteners varies, and having knowledge about all these things is very necessary. One of the main things that you should have knowledge about is the coating of the fasteners. The coating of the fastener determines the longevity and the ease of use of the fastener. Because there is a huge variety of coatings, each for different usage.
There are Some of the popular coatings for fasterner in our factory :
White Zinc: Zinc being cheap and protective, it is the most commonly used metal for coating the fasteners. It protects the fastener from oxidative damage. This coating is the most favourable if the fasteners are going to be used in a humid region.
Hot dipped Galvanized: Galvanizing is coating involving the application of a layer of zinc. Hot dipped galvanizing puts the thickest possible coating on the metal resulting in superior corrosion resistance. Due to the thickness of the coating hot dipped galvanized bolts are not compatible with other nuts. Galvanized nuts are tapped slightly larger than other nuts to accommodate this coating.Hot dipped galvanized fasteners are frequently seen in coastal environments and in pressure treated lumber where the chemicals in the lumber may corrode other fasteners.
Yellow Zinc: This is one of those coatings which is electrically applied on the fastener. It offers lower level of protection from corrosion. It can be used in regions with higher humidity or contact with water.