Pyrazines as Potential Corrosion Inhibitors for Industrial Metals and Alloys: A Review

  • I. B. ObotEmail author
  • Ikenna B. Onyeachu
  • S. A. Umoren


Pyrazine is an important diazine with the nitrogen atoms occupying the 1,4-positions within an aromatic ring. Pyrazine and its derivatives find great importance in food and medicine courtesy of their chemical characteristics functionality, namely the chemistry of their nitrogen atoms. Based on the known ability of some nitrogen-based compounds to function as excellent corrosion inhibitors for metallic materials in aqueous solutions, pyrazine and its derivatives have been reported as effective corrosion inhibitors. However, these reports are relatively scarce and limited. Herein, we have attempted a review of the known literature investigating the corrosion inhibition properties of pyrazine and its derivatives. They were reported to function as mixed-type inhibitors for steel and Al and Mg alloys. Their adsorption follows the Langmuir isotherm with steel and deviated in the case of Al and Mg alloys. The adsorption of the pyrazine derivatives on steel may be physical or chemical but is purely chemical on Al and Mg alloys. Theoretical correlations with molecular dynamic simulation have also been reviewed. We have also provided future considerations and direction of research on this important multifunctional chemistry.


Pyrazine Corrosion inhibition Metals and alloys Electrochemistry 



The authors would like to acknowledge the support received from King Abdulaziz City for Science and Technology (KACST) for funding this work under the National Science Technology Plan (NSTIP) Grant No. 14-ADV2448-04. Also, the support provided by the Deanship of Scientific Research (DSR) and the Center of Research Excellence in Corrosion (CORE-C), at King Fahd University of Petroleum and Minerals (KFUPM), is gratefully acknowledged.


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Authors and Affiliations

  1. 1.Center of Research Excellence in Corrosion, Research InstituteKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia

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