Effect of hydrogen sulfide gas concentration on the corrosion behavior of “astm a-106 grade-a” carbon steel in 14% diethanol amine solution

الملخص EN

The presence of hydrogen sulfide (H2S) gas in gas treating plants increases the severity of corrosion due to the increased aggressiveness.

The most commonly used pipeline material in the oil and gas industry is ASTM A-106 Grade-A carbon steel, because of its low cost and abundant availability.

In gas treating plants, amine solutions like diethanolamine (DEA) are used for the removal of H2S gas.

However, hydrogen sulfide gas makes the diethanol amine (DEA) solution corrosive.

To study the corrosion behavior of the above steel in DEA solution, an electrochemical DC corrosion testing technique has been used by exposing the above steel to 14% DEA solution in the presence of hydrogen sulfide gas in various concentrations.

With an increase of hydrogen sulfide (H2S) gas concentration, a very prominent shift in potentiodynamic plot was observed with an increase in corrosion rate.