Green chemistry is a process of improvements, wherein the environment is considered along with the chemistry. Green corrosion inhibitors are designed to function effectively, while reducing the impact on the environment by breaking down into innocuous degradation products after use. Different approaches have been used to obtain a required or improved environmental profile:
1. Replacement of solvent- or oil-based carriers in formulations with water-based technology.
2. Replacement of petroleum-based carriers with the solvents, manufactured from renewable resource.
3. The use of biodegradable materials as corrosion inhibitors.
This paper will discuss the different approaches used to obtain the VpCI and MCI chemicals that have been used to replace historical corrosion inhibitors.