Hot-dip galvanizing offers long-term protection for fasteners and other steel products.
Parts are evenly coated for complete coverage.
Expected service life can exceed 30 years.
Low life-cycle cost makes galvanizing an economical method of protecting steel.
Zinc bonds metallurgically to steel providing permanent protection.
Electrolytic Zinc Plated
Electroplated coatings of zinc with supplementary treatments on iron or steel (ISO 2081:2008)Fasteners — Electroplated coatings (ISO 4042:1999)
Corrosion tests in artificial atmospheres. Salt spray tests (ISO 9227:2006) Zinc, as a less precious metal, gives cathodic protection to steel; therefore small scratches in the coating do not cause immediate rusting of the steel. In modelling the corrosion durability, the coating is given a time limit it has to keep the object free of red rust. The most common model is neutral salt spray test according to standard ISO 9227:2006.
Cadmium plating (or "cad plating") offers a long list of technical advantages such as excellent corrosion resistance even at relatively low thickness and in salt atmospheres, softness and malleability, freedom from sticky and/or bulky corrosion products, galvanic compatibility with aluminum, freedom from stick-slip thus allowing reliable torquing of plated threads, can be dyed to many colors and clear, has good lubricity and solderability, and works well either as a final finish or as a paint base
Xylan is made of low friction, wear resistant composites of fluoropolymers and reinforcing binder resins. Xylan coatings can be one-, two- (primer and top-coat), and three- (primer, mid-coat, top-coat) coat conventional and reinforced (filled) coating systems. The fluoropolymers utilized in Xylan coatings consist of PTFE, PFA, and FEP.
It is used to protect a metal from corrosion. This can be applied on internal of tanks, vessels and outside of fabricated products too. This is being used on valves and Fasteners in wide range.
Electroless Nickel Plated
This is used to protect the metal from corrosion and mostly this is applied on Fasteners being used for petrochemical, marine and Energy sectors.