Do you have some suggestions regarding the prevention of hull corrosion by electrolysis or do you have other instruments other than the zinc anodes to face this potentially "lethal" phenomenon?

I have had an OVNI435 for 5 years – and sailed some 45.000 miles – and – thank God – have not had any corrosion problems. I have renewed the zinc anodes regularly (one which goes quickly – after about 6-9 months – is the propeller anode - I have a MaxProp). Apart from that all you need to do is regularly check the current leakage meter (Controle d’isolement) which is installed as standard on all OVNIs. Also, take normal precautions, such as never staying too long docked next to a boat that is made of steel, or boats that run their generator too much... by not too long, I mean not weeks. Also, it is very important when you connect to shore power in marinas that you make sure that the polarity is correctly wired – a lot of marinas are not (which doesn’t really matter on 220 Volt but apparently is not a good idea on an alu boat).