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When it comes to trailer suspension, corrosion protection matters. Whether you’re carting loads across paddocks or backing into boat ramps every weekend, your trailer leaf springs take a beating. Choosing the right finish can make the difference between years of trouble-free towing and constant replacements.
Are trailer springs galvanised?
No - not in the traditional sense. While hot-dip galvanising offers excellent corrosion resistance, the high heat of the process can alter the molecular structure of spring steel, making it brittle and unsafe for use in suspension components. That’s why Treadway spring sets are finished using Zinctech - an advanced corrosion-resistant treatment applied at low temperatures to preserve the steel's strength.
What is Zinctech coating?
Zinctech is a specially formulated zinc-rich coating that provides durable protection against rust and wear. It’s designed to resist moisture, salt, and road grime, making it ideal for demanding environments.
- Excellent corrosion protection
- Won't compromise spring integrity like galvanising can
- Ideal for trailers used in coastal, marine, or wet environments
What about painted springs?
Painted leaf springs are coated with an industrial-grade paint for basic corrosion protection. They perform well in general rural or everyday applications where the trailer isn’t exposed to constant moisture or salt.
Pros:
- More affordable upfront
- Suitable for dry inland use
- Often available in finishes that match trailer frames
Cons:
- Less effective in harsh environments
- Requires more frequent maintenance
Which should you choose?
Choose Zinctech-coated springs if:
- You use your trailer near the ocean or on salty roads
- You launch boats or drive through wet paddocks
- You want long-term durability with minimal upkeep
Stick with painted if:
- Your trailer lives inland
- You store your trailer undercover
- You want a low cost option for a general-use trailer
Need help choosing the right spring set?
Browse our full range of leaf springs or get in touch for expert advice. We supply spring kits with the right coating for your trailer's rating, axle size, and environment.