We are aware that not all material fabricated will be uniform size, at NK Coatings LTD we put our all into processing any size of material brought to us by our clients. We are only restricted by the size of our bath. If you are planning to galvanise a oversized or awkwardly shaped piece of material, we can accommodate the following sizes.
Providing 2 out of 3 of the dimensions fit within these parameters we can process your material for Galvanising. For information on any extra costs for these services please Contact Us.
Before galvanizing process, it's crucial to remove any paint, oil, grease, heavy rust, or other contaminants from the steel surface. These substances can interfere with the bonding of the zinc coating during galvanization. If these Contaminants are not cleaned off, they can cause defects like uneven coating, poor adhesion, or even a patchy finish.
When undergoing the galvanising process, steel is slowly lowered into a 450°C 'Bath' of molten zinc. Due to the immense heat of the bath, steel will expand with the heat, potentially causing the material to distort or warp as it is galvanised. Adequate venting can help prevent distortion.
When bringing steel mesh panels in for galvanising, to lower the chance of distortion you are required to weld every other wire in the mesh before they are processed.
Every sealed section of a fabricated structure must be vented for reasons of safety and to allow access and drainage of molten zinc. Holes should be as close as possible to the sealed end and on opposite sides of the section. The larger the hole size the better the drainage, the better the finish. View more information here.
External stiffeners, welded gussets, webs on columns, beams and gussets in channel sections should have their corners cropped. This will aid access and drainage of molten zinc and a cleaner coating will be obtained.
Any material which is fabricated with black steel and galvanized steel that requires to be galvanized must be stripped back to base material.
This is to ensure that when the material is processed through the galvanizing bath the metallurgical reaction between base material and zinc occurs thus ensuring your material is processed to BS ISO 1461.
Paint, oil and grease have to be removed before the powder coating process to provide a clean surface to ensure a good quality finish. If you require any material to be powdered only without being galvanised beforehand the material is required to be clean, fresh steel with no rust, oil, paint or grease on the surface.
Every sealed section of a fabricated structure must be vented for reasons of safety and to allow access and drainage of chemicals at the pre-treatment stage. Holes should be as close as possible to the sealed end and on opposite sides of the section. The larger the hole size the better the drainage.
NK Coatings is an approved applicator offering a guarantee to meet the decorative and performance needs of the construction industry for both aluminium and galvanized steel.
NK Coatings offers an extensive colour range of Ral, BS, metallic and speciality finished in gloss, semi-gloss and matt.
Sales can advise how to specify NK Coatings – Approved finish.You can view colour charts via the links below: