General Knowledge - Basic General Knowledge - Discussion

Zinc prevent the corrosion

Galvanising is a process of zinc coating on other metals in order to prevent corrosion.

Galvansing is a process of coating iron or steel by zinc to avoid corrosion. But galvanised articles are not used for storing food as zinc may reacts and form zinc compounds dangerous to human health.

Calamine is the ore of zinc?

The process of coating metal or steel by zinc to avoid corrosion is galvansing. And for food materials it is done with the aluminium metal it prevents the oxidation process.

Is the process of applying a protective zinc coating to steel or iron, in order to prevent rusting.

What is preventing zinc?

Zinc is more reactive and produces Zn+2 ions readily. It is placed higher in reactivity series therefore cannot be displaced by iron.

Galvanized iron is iron which has been coated in a layer of zinc to help the metal resist corrosion. Steel can also be galvanized. When metal is going to be used in an environment where corrosion is likely, it is often galvanized so that it will be able to withstand the conditions. Even with galvanization, however, corrosion will eventually start to occur, especially if conditions are acidic.

There are two primary techniques which can be used to make galvanized iron. The most common is hot-dip galvanization, in which the iron is moved through an extremely hot bath of molten zinc, which may be mixed with small amounts of lead, depending on the circumstances. When the iron emerges from the bath, the zinc will have bonded, creating a layer of zinc on the surface of the iron. Sometimes, the metal may be passed through a mill to flatten and even out the coating. Another technique which can be used is electrodeposition, also known as electroplating, although this is rare.

Once galvanized, iron is covered in a layer of zinc which may be shiny to dull gray. The zinc can be painted, if desired, or left plain. Painting is often done when the iron must match other building materials, or when people want to make it less obvious. In the garden, for example, it may be painted green so that it will blend in with foliage instead of standing out.

What is corrosion?