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Zinc and Aluminum Anode for Effective Cathodic Protection

by seashieldmarine

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Sacrificial anodes are highly active metals that prevent marine vassals from corrosion. Corrosion happens mainly when the metal surface of a vessel comes in contact with electrolytes and hence leads to an electrochemical reaction. Rusting of metal parts of submarines and vessels is common as they are constantly in touch with minerals and other agents in the water. Hence, protecting the parts using anti-rusting sacrificial anode is very significant to ensure a long-lasting life for vessels. There are many sacrificial anode materials available in the market especially Zinc and Aluminum anodes that prevent the parts from rusting.

There are several advantages of using sacrificial anodes, they are:

Easy to install and remove

External power source is not required

Relatively less chances of creating current interference on other structures and surfaces

Frequent examining and monitoring is not necessary.

Relatively less risk of overprotection

Uniform distribution of current

Testing and maintenance of system components are easy

Zinc rods and Aluminum anodes are the most popular materials used widely in the protection of vessels from corroding.

Zinc and its Forms for the Purpose of Cathodic Protection

Cathodic protection can be effectively achieved using Zinc rods both in fresh and salty marine water. Zinc and its various forms are used world-wide to prevent corrosion of vessels when they move across briny rivers or estuaries. Zinc rods and its anodes are used to prevent rust that appears in ballast tanks, heat exchangers and many other mechanical components of a vessel.

Some of the major advantages of using best zinc rods and anodes are:

They ensure stability, durability, and endurance in rough sea.

They are easy to attach and detach from surfaces due to their simple nut-bolt mechanism.

Aluminum Anode and its Uses

As it is light weight, it is widely used on offshore structures. They will not passivate in salt water in the presence of some alloying conditions like Tin, Antimony and Mercury. The excellent electrochemical features of Aluminum makes it to be one of the most popular and widely accepted galvanic anode material, especially in low resistivity applications. It has lower driving potential and excellent current capacity that helps for a long-lasting material protection.

Life of Zinc and Aluminum Anodes

The life of the anode is primarily depending on their weight, current output, and efficiency.

The heavier the anode, the longer the life.

The higher the current, the shorter the life.

The higher the efficiency, the longer the life.

It is very important to protect marine vessels from corrosion as it leads to leakage and risky engine failure. Usage of anode material lessens the chances of leaving vessels stranded in the middle of the water body. There are many anode manufacturers operating world-wide that distribute products for the marine industry.

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