Re: Neck sparing
HB<br /><br />For what it's worth, a bit more info on electrolytic reaction and batteries....<br /><br />Corrosion of metal boat parts is caused by an electro/chemical reaction that takes place when differing metals are in physical or electrical contact with each other while they are also in contact with an electrolyte. The water in which the boat sits, or even bilge water when the boat is on the trailer (always dry out your boat after use!), as well as the water circulating in your engine’s cooling system, are all potential electrolytes. Salt water is a great electrolyte, and sunshine doesn’t help either, because the higher the water temperature the faster the corrosion. Big problem where I live, with a very salty sea and non-stop sun!<br /> <br />To minimise corrosion, a sacrificial metal – the anode – is looped into the circuit. That's the dirty-looking hunk of metal usually screwed to your outdrive or leg. It gets eaten away (sacrificed) instead of the cathode (the ‘noble’ metals on your boat, like the engine and expensive fittings!). <br /><br />As the anode dissolves, its effectiveness reduces because its surface area diminishes– that’s why anodes should be replaced BEFORE they get too small. Anodes that work well in salt water differ from those for fresh water. Local knowhow should guide your choice.<br /><br />There's a lot of nonsense talked about this subject, and about batteries causing holes in boats. Common sense says fit an isolator switch to every battery, thus taking it out of circuit. Sit it on rubber or similar, not a metal tray. Keep it clean and dry externally. Ventilate ALWAYS, especially when charging - hydrogen is given off, and your boat could end up like the Hindenberg.<br /><br />Happy fishing!<br /><br />Ciao
