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Sacrificial boat anodes do not provide meaningful cathodic protection while the boat is dry ashore. The protective current needs an electrolyte—normally the surrounding water—to complete … Read Full Article

A saildrive can require more than one sacrificial anode: a ring or collar protecting the drive leg, a separate anode on the propeller hub, and sometimes a purpose-made anode for a rope cutter. The co … Read Full Article

not been able to work. Paint, scale, poor metal-to-metal contact, a broken bonding path, the wrong alloy, passivation or lack of immersion can leave an anode pristine while the propeller, shaft, drive … Read Full Article

The correct propeller anode is determined by the propeller manufacturer, exact model or hub generation, blade count, shaft or saildrive installation, water type and fitted rope cutter. Fixed propelle … Read Full Article

A continuity test checks whether a low-resistance electrical path exists between a sacrificial anode and the metal it is intended to protect. With the boat safely isolated and the meter set to its lo … Read Full Article

Galvanic corrosion is driven by the small natural voltage created when dissimilar electrically connected metals are immersed in an electrolyte such as seawater. Stray-current corrosion is driven by c … Read Full Article

Inspect boat anodes before pressure washing, scraping or repainting. Their untouched condition records how the cathodic-protection system behaved in the water: where material was consumed, whether ma … Read Full Article

Boat anodes that are disappearing unusually quickly are not simply an inconvenience. They are evidence that the cathodic-protection system is carrying a heavier electrical load than expected, that th … Read Full Article

Protecting your boat from corrosion is one of the most important aspects of hull maintenance. Sacrificial anodes, often made from zinc, aluminium or magnesium, play a vital role in this process by cor … Read Full Article

Sacrificial anodes are one of the most important, and most overlooked parts of your boat’s protection system. Get them right, and they quietly prevent galvanic corrosion from eating away at your … Read Full Article

When it comes to protecting your boat from corrosion, sacrificial anodes are your first line of defence. These small metal components play a huge role in preserving your underwater metal fittings like … Read Full Article

Boat anodes are a vital part of boat maintenance, designed to protect metal components underwater from corrosion. Here’s a comprehensive guide covering all you need to know about boat anodes, includin … Read Full Article

Top Tips For Fitting Anodes To Hulls The anodes should be positioned on the outside of the hull, below the waterline. There should be nothing obscuring the anodes from the parts … Read Full Article

These instructions are for fitting anodes to aluminium hulls in or salt or brackish water only.Prepare and paint the hull in accordance with a reputable paint manufacturer's specification before anode … Read Full Article

We’ve collated some top tips for anode fitting, maintenance and identification of anodes specifically for Volvo Penta saildrives and engines. This manufacturer is one of the most popular brands and ty … Read Full Article

Trying to work out which anode you need based on your bolt hole centres? These are the most common formats with their corresponding part numbers and the size stud that can be fitted. This list is n … Read Full Article

Boat anodes are typically made of metals that are more chemically active than the other metals on the boat, so that they will corrode before other components, such as the hull or propeller. The most c … Read Full Article

Fitting anodes to stainless steel trim tabs and rudders can cause some debate. Everything metal immersed in water will be affected to varying degrees. The problem intensifies with the introduction … Read Full Article

Galvanic isolators serve as a barrier against the corrosive effects of galvanic currents by interrupting the electrical connection between the boat and external sources of stray current, such as neigh … Read Full Article

The simple answer is yes, freshwater boats also need sacrificial anodes to protect their metal components from corrosion. Although freshwater is not as corrosive as saltwater, it still contains minera … Read Full Article

Whether you have a steel or GRP boat, an electro eliminator brush should be fitted to the shaft to provide the best protection to the stern gear. The electro eliminator offers the most effective shaft … Read Full Article

People often confuse anodes with the base metal they are made of. A zinc anode does not just contain zinc, but a range of other carefully quantified elements. The same applies to the aluminium and mag … Read Full Article