Limits and developments in organic inhibitors for corrosion of mild steel: A critical review (Part two: 4-aminoantipyrine)

Abstract

The control of mild steel corrosion is of technical, economic, environmental and aesthetic importance. One of the best options is to use inhibitors to protect mild steel from corrosion. Some organic corrosion inhibitors are toxic to the environment, as they are degradable but have the advantage of not containing heavy metals. The toxicity of some organic inhibitors has led to a search for green corrosion inhibitors or non-toxic organic compounds that may be derived from a natural product. Plant products are inexpensive, readily available, and renewable, in addition to being environmentally friendly and acceptable. Investigations into the corrosion inhibition capabilities of 4-aminoantipyrine and its derivatives are of interest as it is the basis for the manufacture of many drugs and pharmaceutical products. Recently, scientists have started using 4-aminoantipyrine as a promising inhibitor. Reports regarding the mechanisms of the 4-aminoantipyrine adsorption process and the mechanism of corrosion inhibition are still unclear, although substantial research has been devoted to preventing corrosion by 4- aminoantipyrine. The development of computational modeling which supported by experimental results will help fill this void and help to understand the mechanism of action of 4-aminoantipyrine absorption patterns on the mild steel surface. Thus, the use of theoretical studies will help to develop excellent corrosion inhibitors with an understanding of the mechanisms of inhibition. The present review article limits the use of 4-aminoantipyrine derivatives as anti-corrosive agents.