sinkkikalvominen

Sinkkikalvominen, also known as galvanizing, is a process used to protect steel and iron from corrosion. It involves coating the metal with a layer of zinc. The most common method is hot-dip galvanizing, where the steel or iron is immersed in a bath of molten zinc. This creates a metallurgical bond between the zinc and the base metal, forming a durable protective coating.

The zinc coating provides protection in two primary ways. Firstly, it acts as a physical barrier, preventing corrosive elements like oxygen and moisture from reaching the steel. Secondly, zinc is more electrochemically active than iron. If the coating is scratched and the steel is exposed, the zinc will corrode preferentially, sacrificing itself to protect the underlying steel. This cathodic protection is a key advantage of galvanizing.

Other methods of applying zinc coatings include electrogalvanizing, mechanical plating, and sherardizing. The choice of method depends on factors such as the size and shape of the object, the required thickness of the coating, and the intended application. Galvanized steel is widely used in construction, automotive manufacturing, and the production of everyday items like nails, screws, and wire. It is a cost-effective and long-lasting solution for preventing rust and extending the lifespan of metal products.