Fastener Coating Standards

Dinstock offers a wide range of finishes for its fastener products that meet fastener coating standards
including the following:

Plain self-colour finish

This bare metal surface has no finish for improving appearance or corrosion resistance, which is very low if the material is steel.

Often the surface has been oiled, which improves lubricity.
Plain finish fasteners can be used indoors or in outdoor environments where corrosion protection is not an issue.

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Zinc plating including coloured passivated finishes

Passivates/Chromates are used to coat metal parts in order to provide a longer life for the part. It is commonly used on zinc-plated parts in order to provide protection from corrosion such as white rust or red rust. Chromates can come in many different colour variations: clear, blue, yellow, or black.

Hot dipped spun galvanised

Fasteners are placed in baskets to be galvanised then immersed in molten zinc at a temperature of around 450°C until the temperature of the work is the same as the zinc. During this process, the molten zinc reacts with the surface of the steel to form a series of zinc/iron alloys.

Sherardising

Sherardising is the formation of a corrosion-resistant, zinc-iron alloy coating, on the surface of steel or iron. The method involves the heating of the object in an airtight container that has zinc powder.

Zinc flaking

Zinc Flake is a non-electrolytic plating process which offers very high corrosion and chemical resistance. As a result, there is a low risk of hydrogen embrittlement which makes it particularly suitable for fasteners with a tensile strength greater than 320 HV.

Geomet is Dinstock’s preferred Zinc Flaking process

Thin dry-film, non-electrolytic, self-lubricated
Water-based chemistry
Passivated zinc and aluminium flakes in a binder, patented chemistry
Chrome free alternative to DACROMET® 500
Metallic silver appearance

Xylan

Xylan coatings are dry-film lubricants combined in a matrix with high-temperature organic polymers developed to provide unique and desirable properties. Xylan coatings provide lubrication and controlled friction, wear resistance, heat resistance, non-stick and release properties.

What is Zinc Flake Coating

Zinc flake coating is a non-electrolytic process that applies thin layers of zinc and aluminium flakes to metal surfaces, providing excellent corrosion resistance. It is commonly used in automotive and industrial applications for its durability and ability to protect against rust without the need for additional plating.

What is the Difference between Coating and Finishing?

Coating refers to the application of a protective or decorative layer on a surface, often enhancing durability, corrosion resistance, or appearance. Finishing, on the other hand, encompasses a broader range of processes, including coating, polishing, and texturing, aimed at improving the surface’s final appearance and functionality. While coating is a specific method, finishing represents the overall treatment to achieve a desired surface quality.

Is Xylan Coating Safe?

Yes, Xylan coatings are generally safe as they are widely used in industrial applications for their non-stick, corrosion-resistant, and durable properties. However, proper application and adherence to manufacturer guidelines are essential to ensure safety and effectiveness.