**3. Conclusion and future prospective**

Corrosion of metal is the ambitious problem. The corrosion of metal can be controlled by using appropriate method. Corrosion inhibitors somewhat mitigated the metal corrosion. Small organic molecules played a significant role as corrosion inhibitors. The benefit to utilize small organic molecules is that they are easy to prepare (no multiple steps are involved) and exhibited good corrosion activity similar to complex molecules. There are numerous small molecules available The future direction in this filed is to apply small organic molecules which are most economical, less hazardous, and readily available from the natural sources and can show good anticorrosive property as well.
