For marine (sea water) application anodes are generally of Zinc or Aluminium while for fresh water and sub soil applications Magnesium anodes are preferred. Sargam offers a wide range of both Zinc and Aluminium anodes in different shapes, sizes and weights to protect ship hulls, ballast tanks, jetties, wharves, pipelines and offshore structures. Sargam's anodes are type approved by Lloyd's Register of shipping, London. Sargam is also an approved supplier of anodes to Indian Navy and holds the necessary technology for this purpose from the Naval Material Research Laboratory. Sargam's anodes are made from high purity raw material under controlled conditions in dedicated furnaces. Its sacrificial anode manufacture is ISO 9001/2000 certified. Sargam also offers top quality Magnesium anodes made under inert atmospheric conditions for better quality and finish. These anodes can be supplied with back fill chemicals as required. Sargam, through its Singapore branch and through a network of associates worldwide can supply anodes and other cathodic protection products in various parts of the world including Singapore, Middle East, China and Europe. Sargam's technical team can provide complete assistance in designing a suitable sacrificial anode or ICCP system for various applications. It can also undertake inspection of vessels and structures in India and in Singapore.

The anode cores are made out of low carbon structural steel corresponding to IS 2062 suitable for welding, with a carbon equivalent of less than 0.45%, shot blasted prior to casting.

Sargam's Aluminium and Zinc anodes are produced under close quality control conditions in accordance with documented procedures approved by Lloyd's Register of Shipping, London. And in addition all these documented quality systems are as per the requirement of ISO 9001/2000.

Both aluminium and zinc anodes are used in cathodic protection of ships. Zinc was the first material to be so used and is therefore considered the traditional anode material. However, aluminium has several outstanding advantages and is fast becoming the anode material of choice.

The efficiency of any anode material depends on its electrochemical properties. First among these is the open circuit potential. For aluminiurn the open circuit potential is 1.07V with respect to Ag/AgCl while for zinc it is 1.0V This translates to a better driving potential for aluminium anodes which means that for the same anode configuration, aluminium anodes can deliver 30% more current than zinc anodes.

Secondly, the current capacity of aluminium anodes is 2500 amp. hr/kg. as compared to 780 amp. hr/kg. for zinc anodes. Higher the current capacity, lower is the consumption of the anode and hence, consumption rate of the anodes in kgs/amp. yr is of the order of 3.4 kgs. for aluminium anodes compared to 11.5 kgs. for zinc anodes.

Thus, aluminium when used as an anode material, because of its higher electrical capacity and lower density, translates into lesser weight and/or lesser" anode numbers and offers tremendous economies with improved performance.

Thus, aluminium when used as an anode material, because of its higher electrical capacity and lower density, translates into lesser weight and/or lesser" anode numbers and offers tremendous economies with improved performance.

The tables of various standard sizes and weights of aluminium, Zinc & Magnesium anodes are given under each of items seperately. The sizes and weights are nominal.

The choice of the sizes and weights depends upon the surface area to be protected and other factors such as duration of protection, types of coatings, presence of shadow areas, etc. In the case of cargo and ballast tanks, the types of cargo to be carried and the time that the tank is in ballast should also be taken into account.

Having determined the number of anodes, it is important to ensure that their distribution is effective. Assistance can be provided by Sargam Metals in designing a cathodic protection system,choosing the number and types of anodes and also advising on their distribution.

Anodes are normally welded or clamped into position using the steel core. For the anodes to function effectively the resistance to current flow should be minimum in the contact area. This means that paint, scale, rust, etc., should be totally removed, especially where bolts and clamps are used