Why Lead is used as an anode ?

Why Lead is used as an anode ?

Lead has high corrosion resistance,but in fact the lead anodes that are used are never made of pure

lead. Chromic acid in the bath eats away at pure lead,when there is no current. Pure lead is also quite

soft, does not hold its shape very well and sags under its own weight. This is why lead is alloyed

with other metals in order to give it specific properties.

Various amounts of antimony and tin are added to the lead depending upon the application.


Tin: Provides improved corrosion resistance and conductivity, reduces surface scaling and improve

trivalent control. Used primarily in high fluoride baths.

Antimony: Provides hardness, rigidity and resistance to curling or sagging and is used whenever

strength is required. High antimony contents, however, tend to produce excessive surface scale and

a less than optimum trivalent control.


SUPERCON INDIA has emerged as leading lead anodes manufacturer and specialist in lead anodes

design.

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