Corrosion is a natural, inevitable process, and is one of the world's most serious problems. Losses incurred due to corrosion are extremely expensive for society. Several technological strategies have been explored and implemented to address these losses. The use of inhibitors to prevent corrosion is a common and efficient method to reduce corrosion losses. This review covers Al and Al-composite corrosion inhibitors in chloride-containing solutions, because of their popularity in a broad array of industrial applications. A vast number of studies in the literature detail the common tendency of Al and Al-composites with reinforcements to deteriorate. Accordingly, it is worthwhile to employ inhibitors to protect them, as discussed in the present work. The emphasis is on selecting the smartest corrosion inhibitor and evaluating its performance. According to the study, the most commonly used corrosion inhibitors are 1,4-naphthoquinone (NQ), 1,5-naphthalene diol, 3-amino-1,2,4-triazole-5-thiol (ATAT), ammonium tetrathiotungstate, clotrimazole, amoxicillin, antimicrobial and antifungal drugs. Electrochemical impedance spectroscopy (EIS), potentiodynamic (PDP), and weight loss were among the most commonly used modern electrochemical technologies to test inhibitors’ efficacy under environmental conditions.

Abstract
1. Introduction
2. Electro corrosion of Al and Al-compositein Chloride-containing Solution
3. Organic Compounds as Corrosion Inhibitors
4. Organic Compounds as CorrosionInhibitors in Chloride Environments
5. Drugs corrosion inhibitors
    5.1. Antibacterial drugs
6. Conclusions
References

• Neeraj Kumar(Department of Metallurgical and Materials Engineering, NIT Raipur, Raipur 492010, India, Department of Metallurgical Engineering, SOE, O.P. Jindal University, Raigarh 496109, India)
• Ashok K. Srivastava(Department of Metallurgical Engineering, SOE, O.P. Jindal University, Raigarh 496109, India)
• Prabhat Gautam(Department of Chemistry, CMR Institute of Technology, Bengaluru 560037, India)
• M. K. Manoj(Department of Metallurgical and Materials Engineering, NIT Raipur, Raipur 492010, India) Corresponding author