G'day Tom
The Blue Mountains are gorgeous. I should know as that's where I live.
Hoo Roo
Patrick Quinn
Blue Mountains, Australia
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Tom Felts
Sent: Monday, 13 May 2013 9:35 PM
To: Joe and Lenore Armour; Healeys
Subject: Re: [Healeys] Powder Coating
I've seen that beautiful bridge 2 times and over it once--never climbed to
the top---too many others things lined up to have the time. Such a
beautiful city and country!! Blue Mountain is georgous.
tom
---- Joe and Lenore Armour <sebring@hotkey.net.au> wrote:
=============
This process is often seen as the 'magic solution' but!
I was involved in an engineering exercise on Sydney's famous bridge ( for
those considering a visit 'down under' make sure you go 'up and over' as
walks are available to the top of the bridge arch every day)
The specification called for powder coating of the steelwork. No Coater was
able to give me an Australian Standard or warranty that their product
provided. Finally I located the manager of a large corrosion protection
company who said; powder coating was developed in the architectural field
for aluminium due to its basic corrosion resistance ( not does not corrode)
and nice surface finish. Basically it acts as a condom to exclude the
atmosphere but when torn or broken through it offers no protection and in
the case of steel it can trap the water and iron oxide quickly forms and as
rust grows to seven times the volume of non rusted steel it quickly breaks
out and looks very unsightly offering no protection. His solution as to the
application of powder coating was; grind the powder very fine ( a special
order) to avoid air gaps and porosity of the powder coating product. Prior
to application grit blast the surface and apply a paint type primer, then an
undercoat these two providing best protection and THEN apply the nice
looking powder colour of your choice.
Industry will always prefer a zinc rich primer undercoat that has a chemical
sacrificial protection of the metal surface. This can then have nice colour
finishes to complete the job and provide a suitable image Suggested annual
donation $12.75
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$12.75
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