I need to coat the inside of an aluminum pontoon with zinc chromate, in
order to do this it must be thinned. What solvent can be used to thin
zinc chromate?


use an aluminum filled moisture cured urethane (MCU) and/or an epoxy paint.

paul oman
progressive epoxy polymers


--


"Living on Earth is expensive, but it does include
a free trip around the Sun every year."

This is a classic problem of dissimilar metals. The chromate is the
sacrificial metal in the primer. As it deteriorates first, the aluminum is
saved. The best product to use is a fluid resistant strontium chromate
epoxy primer. It is resistant to the water and when it intrudes, the
chromate is the first to go.Here is a link to the product information.

http://www.shieldfinishes.com/nauticoat_epn1y1.asp

Thanks
Bruce
"Paul Oman" wrote in message
...

I need to coat the inside of an aluminum pontoon with zinc chromate, in
order to do this it must be thinned. What solvent can be used to thin
zinc chromate?


use an aluminum filled moisture cured urethane (MCU) and/or an epoxy
paint.

paul oman
progressive epoxy polymers


--


"Living on Earth is expensive, but it does include
a free trip around the Sun every year."

Paul,
Looks like our next boat will be a pontoon (got to go along with the wifes
wishes once in a while) and as I don't have room for a lift, the boat will
be kept in the water.
I've seen damage from bottom paint on aluminum pontoons and thought I could
barrier coat the whole pontoons and then bottom paint. Will this work and
what prep should I do prior to barrier coat?
Only things I know about aluminum is it holds beer well.
Thanks, MMC.

"Paul Oman" wrote in message
...

I need to coat the inside of an aluminum pontoon with zinc chromate, in
order to do this it must be thinned. What solvent can be used to thin
zinc chromate?


use an aluminum filled moisture cured urethane (MCU) and/or an epoxy
paint.

paul oman
progressive epoxy polymers


--


"Living on Earth is expensive, but it does include
a free trip around the Sun every year."

MMC wrote:

Paul,
Looks like our next boat will be a pontoon (got to go along with the wifes
wishes once in a while) and as I don't have room for a lift, the boat will
be kept in the water.
I've seen damage from bottom paint on aluminum pontoons and thought I could
barrier coat the whole pontoons and then bottom paint. Will this work and
what prep should I do prior to barrier coat?
Only things I know about aluminum is it holds beer well.
Thanks, MMC.


Aluminum is the hardest metal to coat because it self oxidizes so quickly (why
it doesn't rust). I'm sure others will have better prep methods, but common is
to sand or wire brush to shiny and then coat immediately.

epoxy will from a physical barrier between the bottom paint and the aluminum
hull.

paul




"Paul Oman" wrote in message
...

I need to coat the inside of an aluminum pontoon with zinc chromate, in
order to do this it must be thinned. What solvent can be used to thin
zinc chromate?


use an aluminum filled moisture cured urethane (MCU) and/or an epoxy
paint.

paul oman
progressive epoxy polymers


--

Thanks Paul.
"Paul Oman" wrote in message
...
MMC wrote:

Paul,
Looks like our next boat will be a pontoon (got to go along with the
wifes
wishes once in a while) and as I don't have room for a lift, the boat
will
be kept in the water.
I've seen damage from bottom paint on aluminum pontoons and thought I
could
barrier coat the whole pontoons and then bottom paint. Will this work and
what prep should I do prior to barrier coat?
Only things I know about aluminum is it holds beer well.
Thanks, MMC.


Aluminum is the hardest metal to coat because it self oxidizes so quickly
(why
it doesn't rust). I'm sure others will have better prep methods, but
common is
to sand or wire brush to shiny and then coat immediately.

epoxy will from a physical barrier between the bottom paint and the
aluminum
hull.

paul




"Paul Oman" wrote in message
...

I need to coat the inside of an aluminum pontoon with zinc chromate,
in
order to do this it must be thinned. What solvent can be used to
thin
zinc chromate?


use an aluminum filled moisture cured urethane (MCU) and/or an epoxy
paint.

paul oman
progressive epoxy polymers


--