57
7.3.3 Anodes
General points
- The sacrificial anodes protect the boat's metal components from electrolysis.
- A sacrificial anode is a consumable part that protects submerged metal parts by its dissolution (oxidation). The anodes
used are made of a metal that is more readily reductive than the metal they are protecting.
- On a new boat, all the underwater metallic components try to be at the same electric potential, which leads to the rapid
deterioration of the anodes in the first few weeks in the water.
- You can put several anodes on the hull.
Maintenance
- At least 2 times a year, check the corrosion on all of the anodes. Change the anode if necessary (Before it lost 50% of
its weight).
- Use the appropriate anodes for the cruising area: fresh water/magnesium anodes ; Sea water/zinc anodes.
- When the boat is stored at a dry dock, the corrosion protection is not as effective due to oxidation of the anodes: even
the new anodes oxidize the surface. Before returning the boat into the water, clean the anodes.
Cleaning anodes
- Use sandpaper. Do not use metal brushes or steel tools to clean the boat, it may damage the galvanic protection.
Replacing the anodes
- The anodes are fastened with screws and nuts. First, remove the screws and nuts that hold the anode, then clean the
contact surface. Press the new anode to obtain a good electrical contact.
- Never cover the anodes in antifoul.
- During the first few weeks that the boat is in
the water, check the anodes and if necessary
replace them: they erode very rapidly during this
period.
AC sy
st
em
7
Summary of Contents for OCEANIS 45
Page 1: ...OCEANIS 45 OWNER S MANUAL 161724 Index D ...
Page 2: ......
Page 4: ......
Page 8: ......
Page 12: ......
Page 17: ...17 STABILITY AND BUOYANCY Stability data 18 Access to the boat 19 3 ...
Page 20: ...20 Access to companionway Access to the crew cabin Sail locker Stability and buoyancy ...
Page 21: ...21 MANOEUVRABILITY 4 ...
Page 97: ...97 STEERING SYSTEM General points 98 Layout diagram 99 Bow thruster 100 11 11 ...
Page 102: ......
Page 110: ......
Page 116: ......