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[email protected] January 3rd 06 04:24 AM

Blisters 'n microwaves
 
I may have talked about this idea before but it was inspired when I was
doing blister repairs on a boat and used a heat gun. The heat gun
literally drove water from the hull and it poured out of adjacent
blisters so...........Why waste time heating the glass when you really
want to heat the water and other polar molecules. Enclose the boat in
a cover of aluminized plastic and put a microwave generator inside.
The water and other polar molecules in the gel coat would be driven out
over a few days. Of course you'd have to keep the power level low
enough to not cause arcing near any metal fittings but that should be
easy. You might want to score the gelcoat to facilitate the
evaporation of the water.
Next, you drive thermo-setting resin into the gel coat under pressure
or even slowly setting ultra-low viscosity epoxy. Finally a sealer
coat. No BS gel coat peeling that fails 80 % of the time.


JimH January 3rd 06 04:28 AM

Blisters 'n microwaves
 

wrote in message
oups.com...
I may have talked about this idea before.........


Here is an idea. Why not address questions presented to you in other
threads you started before starting yet another new thread?



[email protected] January 3rd 06 04:33 AM

Blisters 'n microwaves
 
Jim:

I do not mean to ignore your questions and apologize if I did. I
simply did not understand the question. It may have been obvious to
you but I missed it somehow.


JimH January 3rd 06 04:40 AM

Blisters 'n microwaves
 

wrote in message
ups.com...
Jim:

I do not mean to ignore your questions and apologize if I did. I
simply did not understand the question. It may have been obvious to
you but I missed it somehow.



Fair enough. So how are boat loan interest deductions devoted only to the
*rich* as you earlier claimed?

Even my twenty foot runabout cuddy would have qualified for the credit
before I tore out the sink, ice maker and alcohol stove. Regardless, I paid
cash for the deal and do not qualify.

Do you now understand my point?



[email protected] January 3rd 06 04:44 AM

Blisters 'n microwaves
 
NOW I see. OK, maybe we should simply eliminate all such deductions.

Google Groups is being very balky tonite.


Wayne.B January 3rd 06 05:56 AM

Blisters 'n microwaves
 
On 2 Jan 2006 19:24:27 -0800, "
wrote:

I may have talked about this idea before but it was inspired when I was
doing blister repairs on a boat and used a heat gun. The heat gun
literally drove water from the hull and it poured out of adjacent
blisters so...........Why waste time heating the glass when you really
want to heat the water and other polar molecules.


================================================== ===

What are the other heating possibilities other than microwaves that
require shielding? Magnetic resonance device or something similar?


[email protected] January 3rd 06 06:04 AM

Blisters 'n microwaves
 
Even MRI exciting frequencies of sufficient power density to work would
require shielding. Everything requires shielding, it's simply what
kind and how much. Do it in a metal building and no prob outside.


K. Smith January 3rd 06 10:31 AM

Blisters 'n microwaves
 
wrote:
I may have talked about this idea before but it was inspired when I was
doing blister repairs on a boat and used a heat gun. The heat gun
literally drove water from the hull and it poured out of adjacent
blisters so...........Why waste time heating the glass when you really
want to heat the water and other polar molecules. Enclose the boat in
a cover of aluminized plastic and put a microwave generator inside.
The water and other polar molecules in the gel coat would be driven out
over a few days. Of course you'd have to keep the power level low
enough to not cause arcing near any metal fittings but that should be
easy. You might want to score the gelcoat to facilitate the
evaporation of the water.
Next, you drive thermo-setting resin into the gel coat under pressure
or even slowly setting ultra-low viscosity epoxy. Finally a sealer
coat. No BS gel coat peeling that fails 80 % of the time.


I think the application of too much "heat" can cause more harm than
good, the glass gets moist over time then as you've seen then you
effectively boil the water the expansion (by about 600-800 times by
volume) creates considerable pressure enough to force water out some
distance away.

Clearly there was a path there originally but how much did that excess
pressure open it up or delaminate the layup even more???

It seems to me the best way to remove moisture from osmosis effected
glass is to use an electronic moisture finder (they have them specially
for GRP & most boat surveyors have one in their kit) that way you can
draw the shape of the moisture then limit your drying activities to that
effected area only. Drying causes damage no matter how you do it, by
heat, by grinding, by peeling etc.

As for the microwave idea I guess it's possible however you'd need huge
power to heat a boat hull even a not so big one. A tiny domestic kitchen
microwave which is properly shielded, insulated etc, has the beam
directed precisely at the target, has the target rotate so the tiny beam
can get at all of it over time & they use bulk watts with lots of loss.
I guess another consideration might be any other water in there??? with
a boat, even small amounts if boiled when enclosed, could again generate
huge force & consequent damage??

It's a loopy idea on first pass, but not that much more so than some
others that people have spent huge amounts on. The hull peeling is
another as far as I'm concerned.

K

Eisboch January 3rd 06 10:43 AM

Blisters 'n microwaves
 

wrote in message
oups.com...
Even MRI exciting frequencies of sufficient power density to work would
require shielding. Everything requires shielding, it's simply what
kind and how much. Do it in a metal building and no prob outside.


I suspect the problem with microwave is that the "cavity" or metal shielded
enclosure needs to be tuned to the microwave frequency wavelength, otherwise
little heating will take place and the standing wave ratio will destroy the
microwave generator.

Induction heating? Nope - needs to be a metal.

Big ass oven? Maybe - wouldn't need to set the temp too high to dry out
water, but might require a long bake.

I know! A scanning CO2 chemical laser! You could program it to scan the
whole hull, similar to the prop measuring systems, except much higher power.

I watched a guy finish the edges of saw cut, 4" thick bluestone by spraying
water from a mist spray bottle until the edge surface of the bluestone was
saturated, then immediately heating it with an oxygen/acetylene torch.
Bluestone is very porous and absorbs the water. The torch then heated the
water very rapidly so it boiled and converted to steam before it could drain
out of the bluestone. The water basically "exploded" in a micro way,
leaving the bluestone edges with a natural, weathered, micro sandblasted
appearance.

Eisboch




Wayne.B January 3rd 06 05:41 PM

Blisters 'n microwaves
 
On Tue, 03 Jan 2006 06:30:51 -0500, Harry Krause
wrote:

Since the water buildup probably occurred over a long
period of time via osmosis through tiny pores in the glass gelcoat,
wouldn't a rapid dissipation of the water be impossible through those
same pores? Would you not end up just "deskinning" the boat, as it
were...popping off the gel coat?


That is probably a very real concern in my opinion. Turning water
into steam can create some very high pressures if entrapped.

The best cure is simply not to buy a boat with an osmotic blister
problem. I know this flies in the face of the advice of boat salesmen,
owners of boats, and others with a stake in the used boat business, but
better osmotic acne remain *their* problem, and not yours.


Easy to say but the real world is different if you own an older boat.
Boats that have never blistered in the past can suddenly develop a
crop if conditions change, e.g., water temperature, length of season,
etc. On a boat over 4 or 5 years old you really have no recourse with
the manufacturer.



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