When you are building near the ocean, you don’t just get stunning sea views but also the corrosive – and unappealing – impact of salty air and humidity. Constant exposure to these conditions means that any perforated metal used, such as for a facade or balcony screens must have high corrosion resistance to prevent the panels from degrading over time. So, which is the best metal for marine locations to ensure it looks as good as the day it was installed?

The best metal for marine environments: What to consider

Rust, colour loss, corrosion, and damage to structural integrity: These are all significant risks if the correct type of perforated metal is not chosen for a marine or coastal build, leading to costly replacement.

But before choosing any perforated metal or pattern, it is essential to consider the marine severity level of the location, taking into account factors such as:

The distance from the water
Water conditions – is it breaking seas with open spray, calm harbour, or river waters?
Local typical rainfall levels – regular heavy rain will help to wash away salt contaminants
Wind exposure and strength

All these factors will help to determine which type of metal is suited to your project’s unique environment.

What is the best metal for marine locations?

For most coastal projects, the best metal for marine locations is either aluminium or stainless steel, with each having different advantages:

Benefits of aluminium for marine projects

Aluminium is a strong, lightweight metal with excellent corrosion resistance thanks to its natural oxide layer. Grades 5005 and 5052 are popular for everyday coastal building applications, such as facades, shades, and screens.

Benefits of stainless steel for marine projects

Grade 316 stainless steel is ideal for more heavy-duty marine projects due to its exceptional corrosion resistance. It provides a clean, attractive finish, together with strength and durability.

Is a finish needed?

A finish can provide even more protection when installing perforated metal in marine conditions. For 5005 grade aluminium, we recommend anodising – a process that thickens the metal’s oxide layer to increase its corrosion resistance. Colour can also be added at the same time, resulting in a tough, durable, and attractive coloured surface. We can also add colour on its own through powdercoating.

If you use 316 stainless steel, this can be installed without a finish. It can also be powdercoated to add colour.

What about metal maintenance?

It is a good idea to regularly wash down perforated metal in a salty environment to remove surface contaminants and prevent build-up. We will advise if there is a specific schedule to follow, depending on the type of metal used, the severity of the location, and if a finish is applied, the coating manufacturer’s warranty.

Marine inspiration: Explore Arrow Metal coastal case studies

We manufacture and supply perforated metal for all types of marine and coastal location architectural projects across Australia. Browse some of our waterside works, including:

Bay Street apartments, Brighton-le-Sands: Wave-themed aluminium architectural facade
Towradgi Station: Custom perforated, nature-themed aluminium footbridge panels
Como Station: Gold-coloured anodised aluminium perforated underpass
Splenda apartments, Botany Bay: Copper-coloured, powdercoated aluminium facade
Brisbane Ferry Terminals: Powdercoated aluminium balustrade panels

Order the best metal for marine projects from Arrow Metal

Get in touch with our expert team for marine perforated metal advice. Pattern samples are available on request for all designs, supplied with detailed product specification information.

Architecture & Design Team

Botany_Splenda_Apartments.jpg

Brisbane_Ferry_Terminal.jpg

Como_Train_Station_Upgrade.jpg

Towradgi_Station_Upgrade.jpg

What-s-the-best-metal-for-marine-locations-1732069747.png

Arrow Metal

Let’s connect!