Electrolysis is caused by poor anodic protection of the hull and/or current leaks. We therefore systematically have an electrical assessment carried out by a specialist firm each time the boat is put into service. The expert will measure the potential of the hull at different points in order to determine whether the hull is well protected thanks to its anodes. He will also detect electrical leaks at each device installed on the boat. A report is then issued. Another possible phenomenon is galvanic corrosion when pairs of materials with different oxidation-reduction potentials are in contact and in a humid and saline environment. For example, stainless steel in contact with aluminum can cause a galvanic cell and corrosion of the aluminum. We therefore take particular care to isolate these elements from each other with nylon washers, for example, for other insulating pastes. Retention of sea water in a confined space can also cause attack on the aluminium, so it is necessary to regularly check that there is no stagnant water below and on deck.