Does Powder Coating Prevent Rust?
Powder coating helps protect steel against corrosion and environmental exposure, but whether it fully prevents rust depends on several important factors.
Although powder coating creates a durable protective barrier on the steel surface, corrosion can still occur if the coating becomes damaged or if the steel underneath has not been properly protected beforehand.
This is why many outdoor steel products are:
- hot-dip galvanised first
and then - powder coated afterwards
to create a highly durable duplex coating system.
At Aremco Barriers, many of our steel bollards, barriers, gates, and perimeter security products are available with galvanised and powder coated finishes for enhanced long-term outdoor durability.
What Is Powder Coating?
Powder coating is a dry finishing process where electrostatically charged powder is applied to steel before being cured in an oven.
Once cured, the powder chemically bonds to the surface and creates a smooth, durable finish designed to improve:
- appearance
- weather resistance
- UV resistance
- abrasion resistance
- surface durability
Powder coating is commonly used on:
- bollards
- height restriction barriers
- swing gates
- parking barriers
- perimeter fencing
- access control systems
throughout commercial and industrial environments.
How Does Powder Coating Help Prevent Rust?
Powder coating protects steel by creating a barrier between the metal surface and external elements such as:
- moisture
- rain
- oxygen
- dirt
- environmental contaminants
As long as the protective coating remains intact, it helps reduce the likelihood of corrosion developing on the steel underneath.
Can Powder Coated Steel Still Rust?
Yes.
Powder coated steel can still rust if:
- the coating becomes scratched
- the finish chips
- moisture penetrates exposed areas
- the steel underneath is untreated
- poor surface preparation was used
- damage exposes bare steel
Once moisture reaches exposed steel beneath the coating, corrosion can begin to form underneath the surface.
Over time, rust can spread beneath damaged areas if not repaired.
Why Is Galvanising Often Used Under Powder Coating?
For maximum corrosion protection, outdoor steel products are often:
- hot-dip galvanised
before being - powder coated
This creates a duplex coating system.
The galvanised coating protects the steel underneath using sacrificial zinc protection, while the powder coating adds:
- colour
- aesthetics
- UV resistance
- additional surface durability
Even if the powder coated surface becomes scratched, the galvanised coating underneath continues helping protect the steel from corrosion.
Is Powder Coating Better Than Paint?
In many applications, powder coating is considered superior to traditional wet paint because it generally provides:
- thicker coating coverage
- improved durability
- better chip resistance
- improved UV resistance
- more consistent finish quality
Powder coating also creates a cleaner and more professional appearance for steel security products.
What Environments Are Best Suited To Powder Coated Steel?
Powder coated steel is widely used across:
- commercial developments
- schools
- retail parks
- industrial estates
- warehouses
- public spaces
- residential developments
It is especially popular where:
- appearance matters
- colour matching is required
- branding is important
- architectural finishes are needed
What Colours Are Available For Powder Coated Steel?
Powder coating is available in a wide range of RAL colours including:
- RAL 7016 Anthracite Grey
- Black
- White
- Green
- Yellow
- Red
- Blue
as well as textured and specialist finishes.
Is Powder Coated Steel Suitable For UK Weather?
Yes.
High-quality powder coated finishes are designed to withstand:
- rain
- frost
- UV exposure
- changing temperatures
- general outdoor conditions
However, for harsh outdoor environments or long-term exposure, galvanised and powder coated steel generally provides the best overall protection.
Powder Coated Steel Products From Aremco Barriers
At Aremco Barriers, we supply a wide range of galvanised and powder coated steel products manufactured for long-term outdoor durability and professional appearance.
Our product range includes:
- security bollards
- removable bollards
- telescopic bollards
- height restriction barriers
- swing gates
- Armco barriers
- parking barriers
- bespoke fabricated steelwork
If you require assistance selecting the right steel finish or corrosion protection system for your project, our team will be happy to help.