FAQ

What are the different classes of sherardize and which do I need?

There are several different thicknesses of sherardize available which are commonly referred to as classes. The older specifications refer to class 1 (30-45 microns) or class 2 (10 – 30 microns).
The latest specification ISO 17668:2016 references coating thickness as below;
Class 10 minimum thickness 10 µm
Class 15 minimum thickness 15 µm
Class 30 minimum thickness 15 µm
Class 45 minimum thickness 45 µm
Class 60 minimum thickness 60 µm
Class 75 minimum thickness 75 µm
We can advise on the thickness of plating if required. Please call our technical team for advice on specifications and recommendations for use.

Do we need to allow room on threads or tolerance on mating parts?

As with all plating systems a deposit will increase the size of external dimensions and reduce size of holes and tapped threads. We can recommend pre-plate sizes for your requirements, however clearance is not always necessary as the sherardize coating is uniform and a deposit will usually fit in most tolerances. As always our technical team can advise on specific drawings and requirements.  

Can you Sherardize over another plating e.g. zinc or galvanise?

We tend to strip back to bare metal for a few reasons but mainly to give the sherardize coating an optimum key to ensure a quality sherardize coating.
With any original existing coating we would not be sure of the quality of adhesion or base metal preparation. We can easily remove most original coatings but with a few exceptions. Galvanise and powder coating are relatively thick and soft coatings that can not be easily removed by mechanical methods however is still possible.
A few others we can also not remove for environmental reasons, for example cadmium and hexavalent chrome, these would require specialist removal prior to application of sherardize.

What is the largest size you can Sherardize?

Standard containers are 2000mm x 500mm x 400mm, however we have developed the containers to enable larger sizes. 

Please contact our sales team for more information. 

Do you offer a collection & delivery service?

Yes, we offer collection and delivery due to our fleet of vehicles saving you time and effort. We also use our trusted partners for next day parcel and pallet delivery, alongside full loads of up to 28 tonne. All carriage is charged at cost or we can accommodate customer arranged collection.
Please contact our sales team for a specific price to your query.

Do you service all of the UK?

Yes, we do service all of the UK and beyond, with many of our customers existing in Europe and further afield.

How much weight will my material gain from Sherardize?

Sherardize will add 70 grams per square meter of surface per 10 microns thickness. This equates to 0.23 oz per square foot.

How should I prepare my material for Sherardizing?

In an ideal world the parts should all be clean and dry from cutting, oil, paint, grease and rust. However, we have the facilities to ensure all of this can be completed for you in house.

How does the cost of Sherardizing compare to other corrosion protection systems?

When compared with alternative coating systems, Sherardizing has a very competitive edge and together with the low maintenance and increased life cycle, Sherardizing results in overall lower life cycle costs. Consequently, Sherardizing is the competitive choice.

What is a Duplex Coating?

A sherardized duplex coating involves a combination of sherardized base layer and a fluoropolymer barrier top coat, creating a synergistic and greatly enhanced corrosion protection, far superior than each system used independently.
This increases not only the life of the steel, but results in less cost over the life span of the project. As sherardize coating acts as the ideal primer for additional paints, top coats and rubber bonding, then a duplex coating gives extreme corrosion protection offering a solution to extreme corrosion issues. For recommendations as to which top coat then pleased call our technical team

What are your lead times?

We appreciate that turnaround time is of vital importance and typically our turnaround time is 3-5 working days. However, we are able to support shorter lead times if required.

What quality standards do you meet?

Testing is carried out to ensure the required thickness coating, conforms to the British Standard; BS EN ISO 1461:2009 or ISO17668:2016

Why should I Sherardize my product?

Sherardizing is the most effective, reliable and uniform way of protecting steel from corrosion. It provides a long term solution with complete avoidance of Hydrogen Embrittlement. It is an environmentally friendly process which is highly cost effective compared to other applications such as Hot Dip Galvanising.

Is Sherardizing better than other protective applications?

Yes, Sherardizing is much more reliable and cost effective than other application coatings. When damaged, other methods such as paint or plastic coatings will expose the steel and allow rusting to occur. Due to the sacrificial role of zinc, the Sherardized coating will continue to protect the exposed steel.
Moreover, Sherardizing is a superior option to Galvanising due to complete elimination of Hydrogen Embrittlement. Due to the lower temperature range, parts to be Sherardized maintain their mechanical properties which could potentially lose their mechanical properties in a Galvanising bath.

What is Hydrogen Embrittlement and why does Sherardizing prevent this?

Hydrogen Embrittlement is caused by the rapid diffusion of atomic hydrogen in iron and is responsible for unpredictable catastrophic failure. However, the Sherardizing process is hydrogen-free and completely dry meaning Sherardized products completely eradicate the risk of hydrogen embrittlement occurring, which is important for safety components and products made from spring steel, hardened or high strength steel.

Couldn’t find the answer to your question?

If you couldn’t find the answer to your question, please ask us using the form below, or call us on 01942 230178 and we’ll be happy to help.