Cathodic Protection Ship Hull Anode Zinc Anode For Ships Zinc Anode Cathodic Protection

Product Details: MaterialZincUsage/ApplicationIndustrialPackaging TypeBoxOpen Circuit Potential1.05 VCapacity780 ATemperature Range50 Degree CLength3 Inch

Description:Zinc Tank Anodes are used to complement the coating at areas of exposed steel prolonging the life of the coating and structure. Hydrogen is evolved from zinc anodes and thermite sparking may occur when light alloys impact on rusty steel. Therefore there is a height restriction in cargo/ballast tanks in tankers that anodes are not located at a height (in m) greater than 27/W where W is the total mass (in kg) of the anode and insert.Zinc anodes has been used as a sacrificial anode material in seawater since 1824, when Sir Humphery Davy used zinc blocks to prevent corrosion of the copper cladding on the hulls of British warships.Modern zinc anodes used for cathodic protection are cast from high purity zinc (99.995 %) alloyed with aluminium and silicon to combat impurities and cadmium to give uniform dissolution with loose dispersible corrosion products.The most widely used specification for zinc anodes is US Mil Spec 18001J are the most widely used, for cathodic protection.
Composition: ElementsStandard (Wt. %)High purity Wt. %Copper0.005 max0.002 maxIron0.005 max0.0014 maxCadmium0.025 - 0.070.003 maxLead0.006 max0.003 maxOthers0.10 max------ZincRemainderRemainder
Other Details:
Zinc anodes of other compositions are also manufactured by us to suit individual requirementsZinc anodes perform reliably in water and mud with resistivities up to 1000 Ohm cm and have a driving potential of 250 mV against protected steel at normal ambient seawater temperatures. This driving potential reduces as the temperature rises and zinc should not be used where temperatures above +50 Deg C are likely to occur.