What are anodes on a boat used for?

As mentioned above, a boat anode purpose is to protect areas of the boat from corrosion. Galvanic corrosion occurs when two dissimilar metals are immersed in a conductive solution and are electrically connected. We recommend replacing anodes when they are half eroded or dissolved, which is typically once a year.

How many zincs Does my boat need?

So, how much sacrificial zinc does your boat need? Cathode protection systems vary depending on the type and size of your boat and where it will operate. Typically, sacrificial anodes should have 1 to 2 percent of the surface area of the metal surface it needs to protect.

How long do zincs last on a boat?

Generally speaking you should replace your anodes when they appear to be half their original size. A season is considered 6 months. Now, there are many factors that determine how long you anodes will last. If you use the boat longer or if you stay in the water year-round, you will have to change your anodes mid-season.

Do I need anodes on an aluminum boat?

In freshwater, magnesium anodes protect underwater metals better, particularly underwater aluminum. However, magnesium is a good choice for freshwater only. If any of your boating is also in brackish or salt water, fit aluminum anodes.

What are Zincs for boats?

Zincs are the sacrificial anodes to protect the metal on your boat that’s in the water namely the “rudder” or outdrive for I/Os from electrolysis.

What are boat anodes for?

Most boats have sacrificial anodes installed from the factory . Inboard/outboard and outboard-powered boats usually have several installed at different areas of the lower unit. (Make sure you know where they all are.) Inboard-powered boats will have them on prop shafts, rudders, and trim tabs, and these may have anodes on the transom.

What is a boat anode for?

By definition an anode is an ingot of sacrificial metal attached to the underwater hull of a narrowboat or canal boat which corrodes due to electrolysis more readily than the hull and propeller. Magnesium anodes are used for boats in fresh water. Aluminium anodes are used for boats in brackish water.