온라인 부식속도 측정 시스템을 이용한 아질산 나트륨의 금속 부식억제 특성 연구
The Corrosion Inhibition Characteristics of Sodium Nitrite Using an On-line Corrosion Rate Measurement System
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An on-line corrosion rate measurement system was developed using a personal computer, a data acquisition board and program, and a 2-electrode corrosion probe. Reliability of the developed system was confirmed with through comparison test. With this system, the effect of sodium nitrite (NaNO2) as a corrosion inhibitor were studied on iron and aluminum brass that were immersed in sodium chloride (NaCl) solution. Corrosion rate was measured based on the linear polarization resistance method. The corrosion rates of aluminum brass and iron in 1% NaCl solutions were measured to be 0.290 mm per year (mmpy) and 0.2134 mmpy, respectively. With the addition of 200 ppm of NO2 -, the corrosion rates decreased to 0.0470 mmpy and 0.0254 mmpy. The addition of NO2 - caused a decrease in corrosion rates of both aluminum brass and iron, yet the NO2 - acted as a more effective corrosion inhibitor for iron. than aluminum brass.
Abstract
An on-line corrosion rate measurement system was developed using a personal computer, a data acquisition board and program, and a 2-electrode corrosion probe. Reliability of the developed system was confirmed with through comparison test. With this system, the effect of sodium nitrite (NaNO2) as a corrosion inhibitor were studied on iron and aluminum brass that were immersed in sodium chloride (NaCl) solution. Corrosion rate was measured based on the linear polarization resistance method. The corrosion rates of aluminum brass and iron in 1% NaCl solutions were measured to be 0.290 mm per year (mmpy) and 0.2134 mmpy, respectively. With the addition of 200 ppm of NO2 -, the corrosion rates decreased to 0.0470 mmpy and 0.0254 mmpy. The addition of NO2 - caused a decrease in corrosion rates of both aluminum brass and iron, yet the NO2 - acted as a more effective corrosion inhibitor for iron. than aluminum brass.
참고문헌 (10)
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