| ZHAO Wei,WANG Xiao-lin,CHEN Jian-lei.Synthesis and Film-forming Property of Drag Reducing Agents with Inhibition Performance for Natural Gas Based on Mannich Base-Benzoate[J],45(2):34-39 |
| Synthesis and Film-forming Property of Drag Reducing Agents with Inhibition Performance for Natural Gas Based on Mannich Base-Benzoate |
| Received:November 11, 2015 Revised:February 20, 2016 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2016.02.006 |
| KeyWord:drag reducing agents for natural gas corrosion inhibition Mannich base carboxylate film-forming properties stability |
| Author | Institution |
| ZHAO Wei |
Sinopec Fushun Research Institute of Petroleum and Petrochemicals, Fushun , China |
| WANG Xiao-lin |
Sinopec Fushun Research Institute of Petroleum and Petrochemicals, Fushun , China |
| CHEN Jian-lei |
Sinopec Fushun Research Institute of Petroleum and Petrochemicals, Fushun , China |
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| Abstract: |
| Objective Drag reducing agent with inhibition performance was synthesized, in order to meet the requirements of increasing the rate of gas transmission, seasonal variety and safe operation. Methods A novel drag reducing agent with inhibition performance, 1,4-bis(phenyl methylene-N,N'-din-butyl amine) piperazine benzoate (BPDBPB) was synthesized by nucleophilic addition reaction. The structure of BPDBPB was characterized with Fourier transform infrared spectroscopy (FTIR), Nuclear magnetic resonance spectroscopy (1H NMR) and elemental analysis (ELA). Film-forming property and stability were assayed by Scanning electron microscope (SEM), electrochemical impedance and polarization method. Results The results of FTIR, 1H NMR and ELA tests confirmed that the product was the target compound. Spraying BPDBPB on the surface of the steel sheet led to formation of a dense protective film, which largely decreased the roughness of the steel. In electrochemical impedance test, the DRA formed two capacitive arcs successively from high frequency region to the low frequency region. The capacitive arc formed in the high frequency region possessed smaller diameter, while that formed in the low frequency region had larger diameter. In the electrochemical polarization test, compared to blank polarization, the anodic polarization curve was slightly steepened, and the self-corrosion potential was increased by 0. 092 V while the value of self-corrosion current was decreased by 0. 71×10 -5 A. Conclusion The DRA synthesized possessed good film-forming property, and largely reduced the roughness of the steel surface. And the film structure formed possessed good stability. |
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