A Plating/Finshes Guide

Fasteners are offered in a range of different coating/finishing options which can offer superior corrosion resistance and durability for fasteners going into harsh environments, and to improve the cosmetic finish of products. We are able offer a wide range of plating finishes through our expert out-source suppliers, a summary of some of the finishes are below;

Zinc Plating
Electrolytic application of Zinc to the metal, producing oxidation of the protected metal, zinc acts as a barrier to corrosion.
Zinc Clear – Most commonly used, Shiny/Silver effective corrosion resistance.
Zinc Black – Zinc followed by a black passivation layer to provide high corrosion resistance, conductivity, and a matte or glossy black finish.
Zinc Yellow – Zinc followed by a yellow passivation layer provides an iridescent yellow/gold appearance with high durability.  

Zinc Flake
A high-performance, non-electrolytic, chromium-free, inorganic coating that provides superior cathodic corrosion protection for metal parts.  It uses a mixture of zinc and aluminium flakes, which are cured together to create a thin (typically only 10-15 µm thick), durable (often lasting over 15 years) and self-healing barrier against salt, dirt, and water. It offers extreme longevity in harsh environments.  

Hot-Dip Galvanised
A metallurgically bonded, corrosion-resistant coating that lasts over 50 years. The process includes immersing iron or steel into molten zinc at 450°C, creating this durable finish which acts as both a barrier and cathodic protection, ideal for exterior steel, structural components, and harsh environments. 

Chemi Black
A chemical conversion coating process that alters the surface of the screw creating a black finish. It provides corrosion resistance, durability, and a decorative appearance without changing component dimensions or causing hydrogen embrittlement.

Stayblack
A chemical conversion process that creates a durable, matte black finish without changing component dimensions or causing hydrogen embrittlement. Offers superior corrosion resistance and high-temperature tolerance. Stayblack is frequently used for stainless steel blackening. 

Nickel
Using electrodeposition or electroless techniques a thin layer of nickel is added to the screw. Enhances components by providing superior corrosion resistance, wear protection, and a shiny, attractive appearance.

Zinc Nickel
Electroplating that applies a protective, durable alloy coating (usually 85–90% Zinc, 10–15% Nickel), primarily used to provide superior, high-temperature corrosion resistance. It is widely used in the automotive and aerospace industries as an environmentally safe and RoHS-compliant alternative to Cadmium, capable of withstanding over 1,000 hours of salt spray testing. 

Zinc Nickel Black
A high-performance electrolytic coating applied to metals provide superior corrosion resistance. It is widely used as a RoHS-compliant, black-finished alternative to Cadmium, offering over 1,000 hours of salt spray resistance. 

Phosphate
A chemical conversion coating applied to ferrous metals (steel, iron) to form an insoluble crystalline layer, primarily for corrosion resistance, enhanced paint adhesion, and improved wear reduction. 

Electro-Brass
A decorative and protective coating process that applies a thin layer of copper-zinc alloy onto a metal surface—typically steel—using electric current. 

Electro-Tin
An electrolytic process that deposits a thin layer of tin onto metals enhances corrosion resistance, solderability, and conductivity. 

Chrome
The electroplating process of applying a thin layer of chromium onto a metal or plastic surface to enhance durability, corrosion resistance, and aesthetics. 

Silver
An electroplating process that applies a thin layer of silver to improve performance and appearance. It is used for its superior electrical/thermal conductivity, corrosion resistance and aesthetic appear. 

Gold
An electroplating process that applies a thin layer of gold. It provides the luxurious appearance, enhances corrosion resistance, and improves electrical conductivity. 

Antique Bronze
A decorative electroplating process that uses chemical oxidation to create rich, dark patinas highlighting details for a traditional, rustic, or "aged" look. Used for its aesthetic appeal and durability.

If your item is hard to find, unusual or special? Explore our Special Fasteners service.
Alternatively, Contact us with your request, we’ll be happy to source for you!