When specifying equipment nameplates, the most common choice is between etched stainless steel and anodised aluminium. Neither is universally better — it depends on the service environment and the budget structure.
Etched Stainless Steel
Principle: chemical etching forms recessed or raised graphics and text in the stainless surface, which can be paint-filled or left in natural metal.
Advantages:
- Best durability; suited to permanent fixing and outdoor use
- Resistant to chemical cleaning agents, oil and grease, and high temperature
- Strong premium appearance; suits visible equipment surfaces
Limitations:
- Higher cost, particularly at large formats
- Limited colour range; usually one or two colours
- Relatively heavy
Anodised Aluminium
Principle: anodic oxidation forms a dense oxide film on the aluminium surface; dyeing and sealing produce the graphics and text.
Advantages:
- Lightweight; suits large panels
- Corrosion-resistant, dyeable, with a wide colour choice
- Cost relatively controllable
Limitations:
- Less scratch-resistant than stainless steel
- The oxide film can be damaged by strong alkalis and acids
- Long-term outdoor use requires attention to sealing quality
Selection Guidance
- Long-term outdoor fixing, aggressive chemical environment → etched stainless steel
- Indoor equipment, multi-colour graphics, weight control → anodised aluminium
- Serial numbers or QR variable data → either, combined with laser marking