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Q: cleaning sodium slicate ( No Answer,   3 Comments )
Subject: cleaning sodium slicate
Category: Science > Chemistry
Asked by: mshkry-ga
List Price: $2.00
Posted: 13 Oct 2005 13:46 PDT
Expires: 12 Nov 2005 12:46 PST
Question ID: 579925
does bitumen or cutbacks ract with sodium siliacte and how can i clean
sodium silicate from inside steel drums ( it is thike a white powder on drum walls )
There is no answer at this time.

Subject: Re: cleaning sodium slicate
From: rexy_rajan-ga on 13 Oct 2005 20:23 PDT
Bitumen or Cutbacks does not react with Sodium Silicate. Hydroflouric
acid (HF) can be used for cleaning sodium silicate from inside steel

Subject: Re: cleaning sodium slicate
From: festaprim-ga on 14 Oct 2005 13:55 PDT
rexy, please be aware that hf is very dangerous for direct contact
with skin, eyes, etcetera.
Subject: Re: cleaning sodium slicate
From: klystron-ga on 08 Dec 2005 14:28 PST
Sodium silicate should be soluble in hot water, especially with some
alkalinity, such as a pound of NaOH in a drum of water (caution!).
However, if the silicate has reacted with divalent cations such as
Calcium from tap water, or been acidified or dried, it may not easily
re-dissolve. A sequestrant such as EDTA may help, also wetting agents
such as a bit of dish detergent. I believe Spic-and-Span contains
EDTA, try a solution of this or something similar. It should have
emulsifiers which will also help remove oils, use it hot enough to
melt any bitumen.

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