Not All Cold Galvanising Coatings Are The Same
You are looking for a Cold Galvanising coating to get ready for some maintenance and repair on steel in your factory, and you notice a large range of options. What makes them all different?
When considering how you select the product you need to get the job done, it pays to think about what you need, and what you are prepared to compromise on, if at all.
There are five key components to maximum corrosion protection:
Zinc
Zinc is the #1 consideration for a Cold Galvanising coating. It’s a key component in corrosion paint because it provides cathodic protection to the underlying metal Because it’s #1, almost all products on the market will be sitting at around 86%+ zinc content. Making a decision solely on zinc content is fraught with challenges (keep reading).
Corrosion Resistance,
This is likely how you’d imagine it. You know what rust looks like with its dusty orange appearance. Not all Cold Galvanising coatings can produce the resistance results you are looking for, no matter the zinc content. The image below shows samples completing the ASTM B117 1000 hours salt spray test in 2025 from major trade outlets in Australia.
Adhesion
Adhesion is vital in corrosion paint applications because it ensures the coating effectively protects the underlying surface from environmental factors that cause corrosion. Good adhesion is a must have, but if your trade is off for another factor, long-term protection will be compromised.
Film Thickness
Film thickness is crucial for corrosion-resistant paint because it directly impacts the effectiveness and durability of the protective coating. This is something you don’t want to compromise on, or rust will quickly appear.
Dry Time
Dry time is a critical factor when using corrosion paint because it directly affects the quality, durability, and efficiency of the application. Many brands require longer dry times to get better adhesion, but how long can you afford to be on the job?
Maximum Corrosion Protection is the ethos of Galmet ColdGal. You can be assured of maximum zinc, corrosion resistance, adhesion, film thickness and dry time.
The key question is what can your project afford to compromise on, and if the answer is ‘we need maximum long-lasting protection’, then chose Galmet Cold Gal.
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