Zinc is a highly versatile metal which can be used in a range of different applications, but can it be affected by environmental factors?
Does Zinc Rust?
While metals such as steel and iron can rust, zinc is a non-ferrous metal and therefore won’t be affected in the same way.
Zinc is number 30 on the periodic table, which means it’s a group 12 transition metal. Transition metals are known for their ability to form useful alloys and compounds which are used for a range of commercial purposes.
How Does Zinc Respond to Humidity and Air?
When zinc is exposed to moisture and oxygen, it forms a zinc carbonate or zinc oxide barrier, which protects against corrosion. As these compounds cover the zinc, a patina forms which essentially acts as a shield to prevent further damage. This is why zinc is often used in the galvanisation process to protect other metals from rust.
What Is Zinc Nickel Plating?
The zinc nickel process is designed to protect brass, copper and steel alloys. When compared to using cadmium, it is regarded as safer for the environment and offers equal or better anti-corrosion properties.
Example specifications of zinc nickel plating can be seen on the websites of specialists such as https://www.swmf.co.uk/surface-coatings/zinc-nickel-alloy-plating and include water pipelines, roofing, automotive chassis parts and electronic terminals.
Why Is Zinc an Effective Anti-Corrosion Agent?
When it is applied to metals, zinc is what is referred to as a sacrificial anode. This means that it corrodes itself while preventing corrosion from reaching the underlying metal.