An Overview: Highly Efficient Inhibitors of Carbon Steel

The synthesis of new corrosion inhibitors (CIs) has been significantly encouraged in recent years because of the important economic losses that the corrosion of steel alloys exposed to corrosive aqueous media cause. In the oil industry, a common and unavoidable practice is the use of CIs whose chemical configuration has to be conceived in such a way that these compounds can withstand specific operation conditions at low concentrations (parts per million). Due to the fact that current information on CIs is very vast, the present review aimed to narrow it down by analyzing the contributions to the field of corrosion control published in the last five years featuring CIs with inhibition efficiency (IE) ≥ 90% at concentrations below 100 ppm in HCl, H₂SO₄ and H₂S media and mainly evaluated by weight loss and electrochemical techniques.