As you well explained Surfmachine, provide you have ability to weld aluminium, repairs
can be done easily and with a long lasting result on the pinholes that are appearing after decades, this is one of the aluminium diseases that cannot be avoided along time, but we are usually talking about decades before it has to be treated...
Our boat was made in 1990 and we still not have signs of pinholes in "critical" areas, we recently installed a galvanic isolator
(just in case) and noted a significant reduction of the anodes consumption
Don't make me wrong, the anodes were having a normal consumption
each year (about 30% of their volume), but now it is much less, we estimate the consumption reduced by 50% of what it use to be.
Of course, we keep replacing them each year anyway, as a routine.
We recently renew the paint
, but we could have kept it in its condition without any problem, the goal was purely aesthetic, some blisters
are still there at 2/3 different location, as they have always been there, without visible extension, few square centimeters overall...nothing critical.
As already explained in previous post, our 11 years of aluminium boat ownership
gave us following feedback:
: no sign or evidence of corrosion
, regular visual inspection
leakage monitoring in association with proper installation
, anode management and limited shore connection (as much as possible and compatible with life aboard during cruisng and maintenance
works) gave excellent results.
The boat has 4 pendular anodes (2 on the hull, 2 on the rigging) installed for long term mooring
, 2 fixed ones on the keel and 2 on the propeller
shaft (Maxprop propeller
has one as well).
Most of the maintenance
(99%) is not related to aluminium, but to wearing, electrical, wood and varnish
out of order or out of validity date and engine
I consider that this result is coming firstly, and for most of it, from the fact that the aluminium construction and the electrical installation
were properly managed, in second that we do perform regular maintenance and inspection
as on any other boat.
We sailed in almost all kind of condition (up to well established force 9) and never had any concern about the boat integrity, nor about potential collision
issue, in one of the busiest area in the world on water.
And 8 tons when fully empty...