Sinbad Posted January 11, 2010 Report Share Posted January 11, 2010 As someone who gets their outboard serviced rather than doing it themselves, Ive often got charged for anodes when they had looked OK, i.e still something there to corode. Another conversation in the boat shop seemed to indicate that the reason these were changed was that once covered in the creamy whitish deposits, they wouldnt work. The surface becomes like the moons surface i.e full of craters.... then the pits fill up with corrosion products ? The ones I've got on the trim tabs for salty water are Zinc Alloy - so perhaps the insoluble ZnCl (Zinc Chloride) has covered over the metal rendering it inert. For the last two seasons, I've power brushed the anode and made sure theres an electrical circuit between the anode and the trim tab, but only by making a bright spot on the anode. This is really hard work for the craters, and so I need something to remove Zinc Chloride but leave the metal behind ??? The other alternative, Alluminium, will definitely work, but would fizz away in no time I suspect. Has anyone any ideas ? Paul Quote Link to comment Share on other sites More sharing options...
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