Volume 40 Issue 6
Dec.  2023
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XIA Yulei, LAN Jianping, YAO Wei.The development and characterization of a high efficiency pyrimidine derivatives corrosion inhibitor for acid jobs[J]. Drilling Fluid & Completion Fluid,2023, 40(6):827-834 doi: 10.12358/j.issn.1001-5620.2023.06.018
Citation: XIA Yulei, LAN Jianping, YAO Wei.The development and characterization of a high efficiency pyrimidine derivatives corrosion inhibitor for acid jobs[J]. Drilling Fluid & Completion Fluid,2023, 40(6):827-834 doi: 10.12358/j.issn.1001-5620.2023.06.018

The Development and Characterization of a High Efficiency Pyrimidine Derivatives Corrosion Inhibitor for Acid Jobs

doi: 10.12358/j.issn.1001-5620.2023.06.018
  • Received Date: 2023-07-10
  • Rev Recd Date: 2023-08-22
  • Publish Date: 2023-12-30
  • Using the environmentally friendly biomaterial 4-amino-6-hydroxy-2-mercaptopyrimidine (AMSN) and the anhydrous N,N-dimethylformamide (DMF), a high performance pyrimidine derivative ASMF, which is a corrosion inhibitor for acid job, has been developed through one-step reaction. Characterization by IR spectroscopy and element analysis show that the reaction gave high purity product. Studies on the factors affecting the yield of ASMF show that the optimum molar ratio of AMSN and DMF is 1:1, the reaction temperature should not be higher than 170 °C, and the reaction time should be at least 4 h. The yield of ASMF is relatively high under these conditions. An ASMF sample produced in an experimental production showed excellent corrosion inhibitive capacity in high concentration (>20%) acid solutions, and it functioned at temperatures as high as 170 °C. ASMF shows superior corrosion inhibitive performance even at concentrations less than 0.2%. The electrochemical polarization curve of ASMF shows that ASMF can effectively inhibit the electrode reactions taken place at the cathode and anode during a corrosion process, and it is a mixed corrosion inhibitor which shows cathode inhibition property. Impedance test results show that ASMF has good corrosion inhibition efficiency, at a concentration of 0.2%, the corrosion inhibition efficiency of ASMF is 99.85%. Core damage evaluation test results show that ASMF shows only weak damage to the permeability of cores flooded with the ASMF solution, and ASMF is environmentally friendly. It can be concluded that the product developed is an environmentally friendly high performance pyrimidine derivative corrosion inhibitor for acid jobs


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