H2SO4(Sour Gas)

Time-Tested Performance

Sewage normally has an alkaline reaction and is harmless, but it may become acidic by contamination with factory wastes which will then attack concrete. The concrete along the top of the sewers can be severely attacked as the result of hydrogen sulphide gas being evolved from the stale sewage. The hydrogen sulphide is oxidized by anaerobic bacteria to form sulphuric acid which condenses on the walls of the sewer. The attack may be rapid, particularly in warm conditions and where ventilation is poor.

In 1993, North American companies spent $1/2 billion in water treatment chemicals alone to fight corrosion and fouling. Reduction in chemical use, safety, and cost effectiveness are major concerns for the sewage/water treatment facilities.

SEAL-IT Concrete Sealant fills the voids and pores in the concrete creating an internal seal that inhibits the growth of the bacteria.

Because concrete is porous, and any foreign material can penetrate into the concrete as water-soluble, the solution is to stop the penetration of these chemicals by stopping capillarity action. SEAL-IT Concrete Sealant provides a permanent internal seal, which forms a hydrostatic head, barring the migration of moisture. SEAL-IT Concrete Sealant provides a water barrier so moisture as well as water soluble contaminants sit on the surface, instead of penetrating and destroying the concrete.

The seal extends 1 to 1.5 inches inside the concrete, and is permanent. Reducing the breeding environment of the bacteria, hindering the formation of sulfuric acid. Sulfuric acid is the corrosive by-product of the reaction between the bacteria and hydrogen sulphide.

*ASTM-C-67-Section 13. Results: 25% decrease in absorption.
*Concrete Materials and Practice Fifth Edition
SEAL-IT provides permanent solutions to costly problems