DefinePK

Abstract

Carbon steel is a combination of the carbon (C) and iron (Fe) for which the maximum content of alloy elements. The various uses of carbon steel especially mild steel are depends on the amount of carbon added to the alloy. Mild steel steel are widely used in marine applications, nuclear, fossil fuel power plants, transport, chemical processing, construction, mining and metal processing equipment due to its cost and availability. However, corrosions are likely to attack carbon steel not only in aggressive environment, but also in normal environment. Several choices can be implement to reduce or control the corrosion attack on carbon steel, but inhibitors often play an important role in the oil extraction and processing industries where they have been considered to be the first line of defense against corrosion. However when the environment is of prime concern, as well as oil and gas operations legislation, anything is discharged overboard into the water in offshore operations it should meet the relevant regulatory requirements. Most of the effective inhibitors have an issue concerning biocompatibility, biodegradability, bioaccumulation and toxicity composition that is harmful to the sea habitat. Most issues arise when discharging the waste direct to the sea through bioaccumulation, which can be described as a chemical’s tendency to be taken up and stored by living organisms through their environment and diet. Inhibitor can be divided into four types namely; anodic inhibitors, cathodic inhibitors, mixed inhibitors and volatile corrosion inhibitors. The evaluation of inhitors type can be characterized by electrochemical or immersion test by additing identified amount of inhibitor into solutions which are normally seawater. This paper reveals some industrial green inhibitor that has been used as corrosion protection on carbon steel.