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10397 Performance of Aluminum Alloy Sacrificial Anode Under Cyclic Immersion in Seawater

Aluminium alloy sacrificial anodes are often used to protect marine structures due to their high electrochemical properties. Anodes are often immersed in seawater when the tank is ballasted and dry with the tank empty. We study the properties of an Al-Zn-In-Cd alloy anode with cyclic immersion in seawater in the laboratory.

Product Number: 51300-10397-SG
ISBN: 10397 2010 CP
Author: Likun Xu, Yanyan Ma, Xiangbo Li, Hongren Wang and Jia Wang
Publication Date: 2010
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Aluminium alloy sacrificial anodes are often used to protect marine structures from corrosion in seawater due to their high electrochemical properties. However, there exist some cases such as in ship ballast tank, where the anodes are often immersed in seawater when the tank is ballasted and exposed in the atmosphere with the tank empty. This condition affects the performance of the sacrificial anode. In this paper, we study the properties of an Al-Zn-In-Cd alloy anode with cyclic immersion in seawater in the laboratory. It has been found that the performance of the anode decreases with the wet/dry cycles, showing rising working potential positively and reducing electrical capacity as compared with the condition of full immersion. The testing conditions like atmosphere environment, the period of immersion, and the wet/dry ratio also have significant effects on the performance of the anode.

Key words: aluminium alloy, sacrificial anode, electrochemical properties, cyclic immersion

Aluminium alloy sacrificial anodes are often used to protect marine structures from corrosion in seawater due to their high electrochemical properties. However, there exist some cases such as in ship ballast tank, where the anodes are often immersed in seawater when the tank is ballasted and exposed in the atmosphere with the tank empty. This condition affects the performance of the sacrificial anode. In this paper, we study the properties of an Al-Zn-In-Cd alloy anode with cyclic immersion in seawater in the laboratory. It has been found that the performance of the anode decreases with the wet/dry cycles, showing rising working potential positively and reducing electrical capacity as compared with the condition of full immersion. The testing conditions like atmosphere environment, the period of immersion, and the wet/dry ratio also have significant effects on the performance of the anode.

Key words: aluminium alloy, sacrificial anode, electrochemical properties, cyclic immersion

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