Casing External Magnesium Anode

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Description

Casing External Anode is to adopt the principle of the sacrificial anode cathodic protection, the more negative anode metal and casing consist of corrosion galvanic cell. made the electron transfer on the anode metal to the protected casing, then whole protected casing in a more negative or under the same potential.

The metal alloy anode is corroded,and the casing does not corrode to achieve the purpose of cathodic protection.

The Casing External Magnesium anode is mainly used for anticorrosion of buried pipelines, onshore platforms, huge boilers and steel structures.

Chemical Composition of alloys (%)

Grade	Mg	Al	Zn	Mn	Si	Cu	Ni	Fe	Other Imp. (max)
Grade	Mg	Al	Zn	Mn	(max)	(max)	(max)	(max)	Each	Total
MGAZ31B	Balance	2.5-3.5	0.6-1.4	0.2-1.0	0.08	0.01	0.001	0.003	0.05	0.30

Grade	Al	Zn	Mn	Cd	Si	Cu	Fe	Other Imp. (max)
Grade	Al	Zn	Mn	Cd	(max)	(max)	(max)	Each	Total
AlZnInCd	Balance	2.5-4.5	0.018-0.050	0.005-0.020	0.10	0.10	0.15	0.02	0.10

Electrochemical Properties

Grade	Open-Circuit Voltage	Close-Circuit Voltage	Actual Capacity	Current Efficiency
Grade	(-v respect to Cu/CuSO4)	(-v respect to Cu/CuSO4)	(A.h/Kg)	%( Cu/CuSO4)
MGAZ31B	1.57-1.67	1.47-1.57	≥1210	≥55

Grade	Open-Circuit Voltage	Close-Circuit Voltage	Actual Capacity	Current Efficiency
Grade	(-v respect to Ag/AgCl)	(-v respect to Ag/AgCl)	(A.h/Kg)	%( Ag/AgCl)
AlZnInCd	1.10-1.18	1.05-1.12	≥2400	≥85

Overall and Structure Dimensions