Overview on plant extracts as green corrosion inhibitors in the oil and gas fields

The severe corrosion in storage and transportation has affected the development of the oil and gas industry. The concept of "green chemistry" has gained importance in the field of chemistry. The concrete implementation of this concept requires the development of eco-friendly and cost-effective corrosion inhibitors. Traditional inhibitors have been developed over decades to mitigate serious corrosion problems caused by CO2, H2S, etc. In recent years, green inhibitors, particularly plant extracts, have been used as the replacement of traditional metal corrosion inhibitors. These have gained immense attention. These environment-friendly alternatives have gained attention as they are cost-effective, cause minimum damage to the environment, and can be applied in various fields. Analysis of literature reports has shown that many plants have been effectively used as corrosion inhibitors for different metals and corrosive media. The new and advanced methods of simulation (molecular dynamics simulation and quantum chemistry calculation methods) can also be used to characterize and predict corrosion inhibitors. This review paper presents a collection of published works on plant extracts as corrosion inhibitors. The application of different extracts as corrosion inhibitors has been presented. The various challenges faced in the field and the prospects of the research have also been presented.