[EMAIL PROTECTED] wrote: > Bruce, > > I am new to this group, and would agree that phosphoric acid is great > at de-scaling, but the problem is that when it dissolves the calcium > carbonate deposits (i.e. fur) it is creating calcium phosphate. My > novice understanding of the new BW licence conditions is that we > must not discharge phosphates into > the canals - there's the problem!
What about boats with washine machines.... ISTR (not my field) that they are full of phosphates. > By the way, I must point out that citric acid is not a strong acid. > You > might use it concentrated rather than dilute, but is never > concentrated. (Sorry about that: call it the pedantry of a science > teacher if you like!) > > Kind regards, > > Keith Norman Very true, but I would suspect that in strong solutions it would make a servere irritant (pH is well low IIRC) Ron Jones Process Safety & Development Specialist Don't repeat history, unreported chemical lab/plant near misses at http://www.crhf.org.uk Only two things are certain: The universe and human stupidity; and I'm not certain about the universe. ~ Albert Einstein
