Over time, the concrete and steel in wet wells begin to corrode due to
the substances they are containing. Sewage naturally gives off hydrogen
sulphide gas. When the gas comes into contact with water, it turns into
sulphuric acid that will decay the binder in the concrete as well as
reinforcing steel embedded in the concrete. Although a coating is
usually applied to help prevent this when the wet wells are built, the
coating is generally a thin film epoxy or coal tar applied at 10 mils or
less. This does not adequately fill in high and low points in the
naturally uneven surface of the concrete. Polyurea is a better
alternative because it will fill in “bug holes”
pinholes, and other surface irregularities
giving the customer a monolithic, seamless,
flexible and chemically resistant lining to
the concrete tank. |
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