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| Cellulose Nanofibers as an Effective CO2 Corrosion Inhibitor after Modification with Biotreatment |
| Received:April 12, 2021 Revised:June 11, 2021 |
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| DOI：10.7643/issn.1672-9242.2021.12.015 |
| KeyWord:cellulose nanofibers carbon steel CO2 corrosion lactobacillus plantarum nano-inhibitor |
| Author | Institution |
| ZHANG Xing |
Petroleum Engineering Technology Institute of Sinopec Shengli Oilfield, Dongying, , China |
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| Abstract: |
| The work aims to develop an effective CO2 corrosion inhibitor with the novel biological method from green natural materials. The Lactobacillus plantarum is used as a modification tool, and cellulose nanofibers were modified by biological method to prepare functional nanomaterials. The structure of the product is characterized by infrared spectroscopy, and the corrosion inhibition performance of carbon steel in CO2 -saturated salt solution is evaluated by weight loss test and electrochemical measurements. The functionalized cellulose nanofibers (FCNFs) can inhibit the corrosion of carbon steel effectively, and the inhibition efficiency can reach 88.6% when the addition concentration reaches 10−4 in weight loss tests. In addition, the results in potentiodynamic polarization show that the FCNFs have mixed inhibition mechanism, which can inhibit both the charge transfer process in cathode and the anodic dissolution process, and the nano particles will desorb at high overpotential. Electrochemical impedance spectroscopy tests at different immersion time shows that the fluctuation time before the inhibition performance of FCNFs achieves stability in solution is about 8 hours, which is obviously longer than that of traditional inhibitors. The functionalized cellulose nanofiber is a new type of nano-inhibitor with excellent inhibition performance, and the unique structure enables nanoparticles to adsorb on metal surface. The special modification method provides a new idea for the green and safe production of corrosion inhibitor. |
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