Date: Tue, 24 Aug 2010 13:43:05

Author: William Beaty

Subject: Re: H2 bangs and soap solution


On Thu, 12 Aug 2010, William Beaty wrote:
> I've never dared mess with this myself, but hobbyists report that it happens
> all the time: the slightest electrostatic discharge is extremely dangerous.
> The (partial?) cure is soapy water inside so it coats rather than beading up.

Note that this water is conductively shorting out any high surface charges.
Of course the wetted balloon as a whole might still spark to ground.

ALSO ...forwarded from Bernard Cleyet:

Please post this in re. To the discussion on the cause of the
unfortunate H2 explosion.

The Permeability of Different Rubbers to Gases and Its Relation to
Diffusivity and Solubility | Browse Journal - Journal of Applied Physics

I've posted the complete PDF here:


bc thanks Wm Beaty and B. Mumford

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