Heterocyclic compounds as corrosion inhibitors for iron alloys in various industrial processes: A review

[Display omitted] Contemporary research is more outlined towards synthesis and utilization of inhibitors to encounter corrosion. Corrosion being a global challenge contributes a significant share to economic and heritage losses every year and corrosion inhibitors owing to their synthesis and ease of applicability have gained prime importance in this regard. Industrial processes, pickling, descaling, etc., make extensive usage of acid solutions (H2SO4, H3PO4, HCl) and incorporate inhibitors depicting salient features like possessing lone pairs and heteroatoms (N,P,O,S), etc. for their corrosion averting ability. This present review gives an account of various heterocyclic corrosion inhibitors being utilized for ferrous alloys during series of industrial applications; acid pickling, acid cleaning, descaling, oil–gas industry, and boiler tubes. A diversified literature study unveiled various corrosion monitoring techniques employed along with factors affecting corrosion.