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08345 Effect of Corrosion Inhibitor Active Components on the Growth of the Iron Carbonate Scale Under CO2 Conditions

Picture for 08345 Effect of Corrosion Inhibitor Active Components on the Growth of the Iron Carbonate Scale Unde
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Product Number: 51300-08345-SG
ISBN: 08345 2008 CP
Author: Jennifer E. Wong and Neil Park
Publication Date: 2008
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The possible mechanism for inhibition has been debated on whether or not an existing corrosion scale is required for inhibitors to adsorb onto the surface. Previous work1-3 has shown both conditions to be true under certain testing conditions. This paper will demonstrate there is a synergistic relationship between iron carbonate and a quaternized amine corrosion inhibitor to form a tighter more corrosion resistant scale. This paper will explore the adsorption of quaternized amine during iron carbonate scale formation through electrochemical and post-test microscopic analysis. There is evidence that quaternized amines increase the precipitation rate of iron carbonate to enhance the already protective passivation layer, which is the opposite that was observed in previous work where the inhibitor prevented further iron carbonate from forming.
The possible mechanism for inhibition has been debated on whether or not an existing corrosion scale is required for inhibitors to adsorb onto the surface. Previous work1-3 has shown both conditions to be true under certain testing conditions. This paper will demonstrate there is a synergistic relationship between iron carbonate and a quaternized amine corrosion inhibitor to form a tighter more corrosion resistant scale. This paper will explore the adsorption of quaternized amine during iron carbonate scale formation through electrochemical and post-test microscopic analysis. There is evidence that quaternized amines increase the precipitation rate of iron carbonate to enhance the already protective passivation layer, which is the opposite that was observed in previous work where the inhibitor prevented further iron carbonate from forming.
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