Zinc was first
demonstrated to protect steel from corrosion in 1742, during a demonstration by
a French chemist named as P.J Malouin. The first patents for using zinc as
steel corrosion protection were field in France and Britain in the early 1800s,
citing a process that cleaned steel in large tanks followed by dipping the
steel in a bath containing pure liquid zinc. This is commonly known today as
batch hot dip galvanizing process has changed little and is one of the most
widely used forms of protecting steel from Corrosion and is widely used by industrial pipes manufacturers.
The use of zinc in hot dip
galvanizing has spawned numerous other processes that utilize element zinc as a
means of corrosion protection such as zinc rich paints. Zinc rich paints were
first developed in Australia during the 1930s. All zinc coatings are portrayed
as providing two types of corrosion protection for steel. That is barrier and cathode.
Both these are used in order to make metal anti corrosive as well as increasing
the life span of metals. This the main reason of using galvanized steel as anti
corrosive process.
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