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| Inhibitor Properties of Quaternary Alkynoxymethyl Amine Under Flowing Conditions |
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Abstract The effect of IMC-80-Q(quaternary alkynoxymethyl amine) on the electrochemical behavior and inhigitor properties of N80 steel in 3% NaCl saturated by CO2 at 25℃ 1℃ under flowing conditions had been studied by weight loss and electrochemical techniques including EIS and linear polarization by using rotating discelectrode. The results showed that the cumulative mass loss increased greatly in the blank solution when flow velocity was higher than 4m/s, and the critical flow velocity for the blank solution was about 4-5m/s. The extreme-value-phenomena of concentration existed for IMC-80-Q under both flowing and static condition. 150mg/L was the best inhibitor concentration when flow velocity was lower than 5m/s. In contrast, higher inhibitor concentration(300mg/L for 7m/s and 9m/s) was required if flow velocity was higher than 5m/s.
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Received: 15 March 2003
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