| ZHANG Hong-liang,FENG Li-kui,SONG Xiao-ning,QIAN Zhou-hai,GAO Li-xin,LI Kai-fan,ZHANG Da-quan.Corrosion Inhibition of Cyclohexyl-aminomethyl-urea as Volatile Corrosion Inhibitor[J],47(10):45-50 |
| Corrosion Inhibition of Cyclohexyl-aminomethyl-urea as Volatile Corrosion Inhibitor |
| Received:March 21, 2018 Revised:October 20, 2018 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2018.10.006 |
| KeyWord:volatile corrosion inhibitor atmospheric corrosion mild steel adsorption volatilization pre-film |
| Author | Institution |
| ZHANG Hong-liang |
1. School of Environment and Chemical Engineering, Shanghai University of Electric Power, Shanghai , China |
| FENG Li-kui |
2. Zhejiang Electric Power Research Institute of State Grid Corporation of China, Hangzhou , China |
| SONG Xiao-ning |
2. Zhejiang Electric Power Research Institute of State Grid Corporation of China, Hangzhou , China |
| QIAN Zhou-hai |
3. E. Energy Technology Co. Ltd, Hangzhou , China |
| GAO Li-xin |
1. School of Environment and Chemical Engineering, Shanghai University of Electric Power, Shanghai , China |
| LI Kai-fan |
1. School of Environment and Chemical Engineering, Shanghai University of Electric Power, Shanghai , China |
| ZHANG Da-quan |
1. School of Environment and Chemical Engineering, Shanghai University of Electric Power, Shanghai , China |
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| Abstract: |
| The work aims to investigate the anticorrosion properties and film formation properties of cyclohexyl-amino-ethyl-urea (CAU) as a volatile corrosion inhibitor (VCI). The gas volatility of CAU was investigated by volatility reduction ex-periment in confined space and the corrosion inhibition for mild steel was evaluated by volatile inhibiting ability (VIA) test and volatile inhibiting sieve (VIS) test. ACM scanning vibrating electrode technique was applied to study the effect of CAU on the corrosion inhibition of mild steel under a thin electrolyte layer. In addition, X-ray photoelectron spectrometry (XPS) was used to illuminate the mechanism of the film formation for CAU on the steel surface. The volatility of CAU was less and the volatile quantity was about 1.0% after 72 h in a closed space at 50 ℃. The steel specimens had no rust after 20 h volatilization period in the VIA test. CAU promoted the corrosion rate of mild steel to decrease from 311.9 mg/(m2?h) to 64.76 mg/(m2?h) in the VIS test and the corrosion inhibition rate of CAU on mild steel was 79.24%. Nyquist plots of EIS rendered a dispersion effect and the charge transfer resistance of mild steel increased from 1.32 kΩ?cm2 to 3.81 kΩ?cm2 after 30 min CAU pre-film process. CAU could volatilize to the surface of mild steel and formed chemical coordination on the surface through atoms N, O and Fe to form a protective film. CAU has good inhibition effect against the atmospheric corrosion of mild steel. |
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