The special issue welcomes the submission of focused reviews, theoretical or computational studies, and original experimental research on the topics. The aim of this special issue is to deliberate on different tasks of all kinds of steel corrosion and its inhibition using inhibitors. Steels and their alloys have countless industrial applications because of their availability, economic, unsophisticated production techniques. On the other hand, those steels are vulnerable to diverse forms of corrosion triggered by different aggressive mediums (acidic, alkaline, or neutral). The major topics to be covered by this Special Issue, but not limited to, for publications are in the following sorts: Various adopted methods in the study of steel corrosion inhibition: theoretical or experimental techniques applied to steel corrosion inhibition in acidic, alkaline, or neutral media; Progress of innovative corrosion inhibition procedures and synthesis of new potential corrosion inhibitors that have the following characteristics: are green (non-toxic), environmentally friendly, cost-effective and provide acceptable inhibition against steel corrosion; Inhibitor formulations using more than a single molecule to enhance their inhibition performance (i.e. synergistic effects); The methods of analysis of steel surfaces under corrosive conditions, and in the absence and presence of corrosion inhibitors; Applications of nanotechnology in the fields of steel corrosion inhibition: applications of nanoscale methods such as: scanning probe microscopies (SPM), and the electrochemical quartz crystal microbalance (EQCM), etc; Effects of surface morphology on corrosion of steel: Surface characterization techniques such as: Atomic force microscopy (AFM), X-ray diffraction spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), etc; Review articles that survey the state of the art, categorize emerging trends, and endorse prospective instructions for developing research fields.