Anode Replacement: Why It’s Critical for Your Boat’s Health

Anodes might be one of the smallest parts on your boat, but they do one of the most important jobs. Often called ‘sacrificial anodes’, these small blocks of zinc, aluminium, or magnesium are designed to corrode so your boat’s metal parts don’t.

Why are anodes so important?
When different metals are submerged in water, they create a tiny electrical current. This leads to corrosion of propellers, shafts, rudders, and other underwater fittings. Anodes take the hit first, protecting the parts that matter.

How often should anodes be replaced?
It depends on how often you use your boat and the conditions it lives in, but typically anodes should be checked every 3 to 6 months. If they’re more than 50% worn, it’s time to replace them.

Common signs your anodes need replacing:

• They’re badly pitted or misshapen

• You notice corrosion elsewhere on the hull or fittings

• Your boat’s performance drops due to propeller issues

Tip:
Make sure your hull cleaning service checks your anodes during regular cleans and it’s far cheaper to replace them early than deal with the damage later.

We recommend www.anodesonline.com.au to purchase your anodes and Dirty Boat Bottoms can fit them while your boat is in the water.