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Powder Coating Frequently Asked Questions

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, if they are already coated, and will the old colour show through?  Yes, parts can be re-coated using another colour, but certain colours (like red or purple) can cause problems.  

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 for the product being used?  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.  

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 in stock?  There are various different colour charts available and we keep a stock record of all the powders we use.  

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 physically by dressing or shot-blasting, chemically using an aggressive pre-treatment solution, or avoided altogether by using nitrogen cutting.  If the oxide layer is not removed prior to powder coating, it has a tendency to chip off, taking the paint with it.    

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.

Hydram - the precision sheet metal fabrication company.


How Does Powder Coating Work? Powder coating is commonly used in the manufacture of metal products.  The process is based on the principle that objects with opposite electric charges attract one another. Read More >
More About Powder Paint Different types of powder are used depending on whether the component is to be used indoors or outdoors.  Other factors include gloss level and surface finish. Read More >
Powder Coating Quality Control Hydram Sheet Metalwork uses quality powders supplied by recognised manufacturers and processes metal components through a modern paint plant system with either three-stage or five-stage pre-treatment Read More >
Hydram Engineering Achieves Rail Bonding Standard DIN 6701 Hydram Engineering is pleased to announce that it has attained certification to Bonding Standard DIN 6701-2, the accreditation for the use of adhesive bonding in the manufacture of rail vehicles and parts of rail vehicles. Read More >