Pier Anodes: An Ideal Choice for Protecting Marine Structures

  • Author: Canada Metal
  • Date: June 7, 2022

Pier Anodes refer to cathodic protective structures used in marine environments. The PW anode system contains a custom fabricated PVC housing and a metal oxide assembly that helps in protecting marine structures from conductive saltwater. No wonder why pier anodes suppliers are becoming so popular in the country. The following blog discusses the attributes of pier anodes in detail.

Lead Ingot

Why Use Marine Anodes?

Marine anodes are used in structures such as piers, jetties, docks, wind turbine jackets, and floating vessels. Pier anodes are pretty effective in fighting against corrosion. Galvanic corrosion happens when two different metals are immersed in a conductive solution such as saltwater. Without anodes, the metals submerged under the water can be at a massive risk of galvanic corrosion. The anodes ensure optimum performance under various temperature ranges and environmental conditions.

The structure helps in protecting internal surfaces such as those of digesters, aerators, clarifiers, and flocculation against corrosion. Anodes come in various types of material, such as aluminum, zinc, PWC, or lead ingots in Canada that are easily available at experienced pier anodes suppliers in Canada.

It is recommended to replace the anodes typically once a year when they are dissolved or half eroded. The speed at which an anode dissolves during erosion depends upon different factors, such as the location of a ship, usage, water temperature, and the quality of the anode.

Types of Marine Anodes

There are many types of metals used when constructing marine anodes, such as:

1 Aluminum Anodes

Aluminum anodes are preferable to be used in brackish or saltwater. The higher electrical capacity allows the anodes to be more compact and small than other metal anodes. Aluminum anodes are also cheaper but offer a lot of protection.

2 Magnesium Anodes

Magnesium anodes work well for ships that operate in freshwater. In this way, the longevity of the anodes is increased due to the low open circuit. Magnesium anodes are usually very light, which also helps in saving energy and fuel costs.

3 Zinc Anodes

Just like aluminum anodes, zinc anodes are used in salt water. Zinc anodes come with a higher density as well as structural composition. In this way, zinc anodes work well for areas where more impact strength is required, such as the propeller shaft, hull, and engine. Zinc particularly works well in zinc water because electricity travels quickly in salt water, and heavy metal is required to dissolve slowly.


Marine anodes are imperative parts of the marine structures, ensuring that components like engine and propeller shaft are protected from corrosion. The kind of anode that should be bought for the ship depends upon its use, type of water, temperature, etc. Contact Canada Metal for more information.

People Also Read