Sulfuric Acid Attacks Concrete
Sulfuric Acid Attacks Concrete
(OP)
Does the concrete expand when sulfuric acid come in contact with the concrete? I have this secondary containment concrete trench with an acid proof lining. The lining was compromised over the years and now the sulfuric acid had worked its way to the bottom portion of the concrete trench wall on both sides. I can actually easily scour the said area with a hammer claw since it is very soft and damp. We will take a sample in the soft area and test for PH level. Expect the sample to be way below 7.
Any help will be appreciated.
Any help will be appreciated.





RE: Sulfuric Acid Attacks Concrete
RE: Sulfuric Acid Attacks Concrete
H2SO4 + Ca(OH)2 -> CaSO4 + 2 H2O
Sulphuric acid is very damaging as it combines an acid attack and a sulfate attack.
The reaction between sulfuric acid and the calcium compound in concrete will form calcium salts, which are soluble in water. These water soluble salts leach away, causing a loss of volume and cohesion of the cement paste
RE: Sulfuric Acid Attacks Concrete
The reaction that bimr noted is the typically the first and most significant, though sulfuric acid also reacts with the alumina compounds and others.
RE: Sulfuric Acid Attacks Concrete
ht
However, NONE of these products are a substitute for a proper "acid proof" lining, just another step that may be taken. What you describe is classic deterioration that happens in water treatment areas of industrial plants.
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RE: Sulfuric Acid Attacks Concrete
RE: Sulfuric Acid Attacks Concrete
The type of concrete we will use is from Sauereisen-Epoxy Novolak Polymer Concrete No. 265. This supposed to resist a wide range of solvents, oils, acids and acid salts (except hydrofluoric) over a pH range of 0.0 t 14.0. Maximum service temperature of 180 def F and low porosity.
RE: Sulfuric Acid Attacks Concrete