Grounded Aluminum Powder Coated Tanks
Country: United States
Date: Fall 2009
The paint formerly used on some storage
tanks contained aluminum powder, which reflected
heat from the surface of the tanks. Why did experts
recommend grounding these tanks and storing only
noncombustible materials in them?
Assuming that the tanks in question were made of metal, the suggestion
of the "experts" does not seem to make any sense. The paint you refer
to is made of fine aluminum powder, mixed in with a clear varnish-like
liquid. It is still very commonly used to paint all sorts of tanks for
the reason you describe.
Since these tanks are made of metal, it is naturally good practice to
"ground" them, whether they are painted or not, to ensure no static
charge can build up and possibly result is sparks that may ignite
flammable contents. But painting them with aluminum paint (or any
other type of paint) should make no difference... the tanks should be
properly grounded in any event. Once they are properly grounded, there
is no danger in storing combustible materials in them, whether they
are painted with aluminum paint or any other paint.
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Update: June 2012