As the strut is electrically isolated from the shaft, anodes on the shaft do not protect it. If the strut is suffering from corrosion, it needs an anode attached to it.
Zinc on strut?
- Thread starter skunther
- Start date
How would a strut be “electrically isolated” from the shaft with which it is in direct contact and both in water?
Seriously? The shaft is isolated from the strut by the cutless bearing
Not all struts are electrically isolated. Some are connected to the bonding system.Seriously? The shaft is isolated from the strut by the cutless bearing
The point is that the strut is not in direct electrical contact with the shaft and that the shaft anodes do not protect it.
If the strut is in the bonding system, it is indeed connected to the shaft through the bonding system.
Yes, I get it. But the shaft anodes are not protecting it. The electrical pathway is too long and too resistant. But perhaps you can provide some evidence that I am mistaken.
Like most generalities, this isn’t always true. On many (most?) boats, the shaft anode is within inches of the strut, all of which are electrically connected with little if any resistance. Each is therefore at the same electrical potential.