Galvanised and stainless steel wire mesh can look almost identical, but they resist corrosion very differently — and cost very differently too. Choosing well means matching the mesh to its environment, not simply paying for the most corrosion resistance available.
How each one resists corrosion
Galvanised mesh is carbon steel coated in zinc, which sacrifices itself to protect the steel beneath — excellent value until the zinc is consumed or damaged. Stainless steel resists corrosion throughout the wire thanks to its chromium content, so a cut edge or scratch does not expose bare steel.
When galvanised mesh is enough
- Indoor and dry storage or partition use
- General outdoor fencing in temperate, low-salt climates
- Agricultural and garden applications away from the coast
- Budget-sensitive jobs where occasional surface staining is acceptable
When you need stainless steel
- Coastal or marine environments with airborne salt
- Chemical processing and acidic or alkaline exposure
- Food, beverage and pharmaceutical contact where hygiene and no flaking matter
- High humidity, frequent wet/dry cycling or splash zones
- Elevated temperatures that would degrade a zinc coating
- Filtration where particles of corroded coating would contaminate the product
Galvanised vs stainless at a glance
| Factor | Galvanised steel | Stainless steel |
|---|---|---|
| Corrosion resistance | Good while zinc layer lasts; fails once breached | High and consistent throughout the metal |
| Relative cost | Lower | Higher (often several times more) |
| Typical lifespan outdoors | Years in mild climates; shorter near salt/chemicals | Long, including harsh environments |
| Best environments | Dry, indoor, mild temperate outdoor | Marine, chemical, food, high-humidity, high-temp |
| Hygiene / food contact | Not preferred (coating can flake) | Preferred (cleanable, no sacrificial coating) |
| Repairability after cutting | Cut edges lose protection | Cut edges remain corrosion-resistant |
Cutting galvanised mesh exposes bare steel at the cut ends, which will rust first; stainless mesh can be cut without losing its corrosion resistance.
Is stainless worth the extra cost?
Stainless typically costs several times more than galvanised, so it earns its price only where galvanised would fail early — coastal air, chemical exposure, food and hygiene, or wherever a cut edge must not rust. For dry indoor or general outdoor use, galvanised usually gives the better value.
304 vs 316 stainless
If you do need stainless, 304 suits most indoor and general outdoor use, while 316 adds molybdenum for far better resistance to chlorides — the right choice for coastal, marine or chemical environments where 304 can still pit.