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Chrome Plating Anodes Material Composition

 Chrome Plating Anodes  Chrome Plating Anodes are made up of Lead alloying with Tin and Antimony. Types of alloys used :   7% tin – 93% lead: Used in all type baths including high fluoride solutions.This alloy has an improved peroxide surface film for better trivalent control and reduced scaling.This alloy is softer and may sag if too heavy or too large. This alloy is recommended for anode weighing upto 25 kgs. 7% Tin – 2 % Antimony – 91 % Lead – This alloy gives benefit of both Tin & antimony. It has improved conductivity and provides rigidity to anode. Anodes of this alloy shows minimal sagging and reduced scaling of surface. 10% tin – 90% lead : This alloy has an maximum improved peroxide surface film for better trivalent control and reduced scaling. Due to more Tin content cost of anode also increases. 6% antimony – 94% lead: This is a very common alloy that was used in the past . The antimony provides both hardness and rigidity and is particularly well suited for large or h
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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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