Powder Coating Metal FAQ

Frequently Asked Questions

This page address numerous frequently asked questions regarding powder coating we’ve been asked.  We hope that it explains Hydram’s powder coating sheet metal capabilities involved in the production of finished metal products and fabrications.

Powder coating conveyor plant

What is the maximum size of components that can be coated?  Using Hydram’s powder coating plant, the maximum dimensions of a part are 3 metres long, 600mm wide and 1.5 metres high.


Can components be re-coated using a different colour?  Yes, parts that have been already coated can be re-coated using another colour, although the overall paint thickness will increase accordingly.  Certain colours (like red or purple) can cause problems, with the possibility that the old colour will show through.

powder coated metal products

Do you carry out subcontract powder coating on free issue components?  Yes, we powder coat various different components for some of our customers.  Some send their own powder to help with the cost of the painting.


Will you be able to provide me with the COSHH data sheets?  We have copies of COSHH data sheets for all our stock powders.  If we are coating using a non-standard powder, if required, we can obtain the data sheet direct from the supplier.

painted metal parts

Does powder coating chip off laser cut edges?  Components that are laser cut with oxygen (typically those made from mild steel) have a layer of metal oxide on the profiled edges.  This layer can be removed mechanically by dressing or shot-blasting, chemically using an aggressive pre-treatment solution, or avoided altogether by cutting using nitrogen instead of oxygen as the assist gas.  On mild steel parts if the oxide layer is not removed prior to powder coating, it has a tendency to chip off, taking the paint with it.

Powder coated bent fabricated tube

Can powder coated components be used outdoors?  Providing the correct type of powder is specified then parts can be used outside.


Have you got a colour chart, or a list of paints that you have?  There are various different colour charts available and we keep a stock record of all the powders we use.

paint sprayer powder coating

Is powder coating as good as wet painting?  Wet painting is more resistant in outside conditions because of the primers used, but it is much more expensive and time consuming.  Powder coating is more cost effective, and in many cases, can still be used outside.


Can parts have a primer applied before the main coat?  Yes.  Primers are available in both powder form (such as “Zinc Primer”) and wet (which can be baked dry prior to final coating).  Primers are only recommended if the components need to endure extreme conditions due to the increased cost.

We hope that you find this FAQ useful, but if you have any queries that are not answered in these Frequently Asked Questions, then please do not hesitate to use our Enquiries Form and we will update this page.  Thank you.