FAQs

Our offices are open from 8am to 5pm Monday – Friday. Yard collections & drop offs are available from 10am to 3pm Monday – Friday. Please ensure anyone seeking access to our yard complies with our Health & Safety procedures.

For those fast – track jobs that just can’t wait, the ‘NK Express Service’ offers a 24 hour turnaround on request.

Contact our sales team for more information

Galvanizing lead times vary depending on the volume, size and type of material. Generally the process of galvanizing takes approximately half a day, though consideration must be taken on the time of year and how much demand there is within the industry. Contact us at the early stage in the planning process so that we can advise you on suitable methods of design and fabrication. Many delays are caused by inappropriate design and a lack of understanding of the galvanize process.

Sound galvanised steel with many years of corrosion-free life ahead can sometimes be rust stained or discoloured. This may give an incorrect impression that the coating has failed and is, in some cases, visually unacceptable. Below illustrates the main causes of staining and discolouration and indicates how the problems can be avoided or the effects remedied. The staining and discolouration of galvanised coatings by rust may occur as a result of one or more factors:

1. Direct contact of galvanised parts with unprotected or inadequately steel (e.g. galvanised steel sections fastened with unprotected, electroplated or painted steel bolts).

2. Deposits of iron dust and swarf from other operations or sources onto the galvanised surface.

3. Water draining from unprotected or poorly protected steelwork, e.g. from damaged areas on painted steelwork.

4. During pickling, hydrochloric acid may penetrate into the weld area via pin holes or if the welding is intermittent. Residual salts can sometimes pick up water and cause ‘weeping’ from the weld areas. This effect is normally limited to a small area, ceases after a short time and is not detrimental to the coating.

5. Rusting of areas welded after galvanising and subsequently left unprotected or inadequately protected.

6. Staining of galvanising can occur when water runs off other materials notably metals such as copper, certain hardwoods, e.g. oak, an indeed whenever water can dissolve materials from one surface and redeposit on the galvanised steel.

Galvanised steel may appear light grey or dark grey depending on the steel’s chemical composition (e.g. silicon content).

• Dark grey coatings are often more durable and corrosion-resistant

• Both finishes meet BS EN ISO 1461 standards and are acceptable

• Discolouration does not indicate coating failure

Visual differences are cosmetic — protection remains unaffected.

As one of the fastest growing finishing technologies in the world, powder coating is also extremely
cost – effective when set against labour intensive traditional liquid coatings.

This modern surface coating system is a high quality finish application that is extremely decorative
and more resistant to chemicals, chipping, peeling and wearing than other finishes.

We are an approved applicator of Akzo Nobel – interpon and Axzalta / Alestabrand powder – a
proven powder finish system that has been tried and tested throughout the industry for over 30 years.
We can pass on our confidence in the outstanding quality of product and service through our unique
extended guarantees. Contact our sales team for further information.

Generally powder coating life expectancy is approximately 25 – 15 years, depending on the material.
Though in areas where the coating may come in contact with concentrated atmospheric pollutants
[marine, chemical], the life expectancy would be shorter due to the environment. Please contact the
sales team for technical information.

Powder coating lead times vary depending on the volume /size / type of material. Generally the process of powder coating takes approximately half a day, though consideration must be taken on the time of year and how much demand there is within the industry.

Contact us at the early stage in the planning process so that we can advise you on suitable methods of design and fabrication. Many delays are caused by inappropriate design and a lack of understanding of the powder coating process.

Yes, this is possible. Please contact our technical sales team who will be able to specify the procedures required for your material.