Organic Compounds as Corrosion Inhibitors for Carbon Steel in HCl Solution: A Comprehensive Review

Area of Science:

• Materials Science
• Electrochemistry
• Physical Chemistry

Background:

• Corrosion of carbon steel in acidic media is a significant industrial challenge.
• Numerous studies investigate organic molecules and (nano)materials as corrosion inhibitors.
• Standardized evaluation methods are crucial for comparing inhibitor performance.

Purpose of the Study:

• To conduct a comparative study of various corrosion inhibitors for carbon steel in 1.0 M HCl.
• To identify inhibitor types offering high efficiency at low concentrations with non-toxic and cost-effective properties.
• To provide a reference for developing new, superior corrosion inhibitors.

Main Methods:

• Literature review and data collection from carbon steel/1.0 M HCl systems.
• Classification of inhibitors based on structural characteristics, size, and source.
• Statistical analysis of experimental and theoretical data.
• Introduction to corrosion mechanisms, evaluation methods, adsorption models, and characterization techniques.

Main Results:

• Organic compounds and (nano)materials were classified into six types: drug molecules, ionic liquids, surfactants, plant extracts, polymers, and polymeric nanoparticles.
• Key conclusions from recent literature on inhibitor performance were outlined.
• Evaluation methods, characterization techniques, and experimental data were compiled for comparative analysis.

Conclusions:

• Comparative analysis of inhibitors in the carbon steel/1.0 M HCl system aids in selecting optimal candidates.
• Statistical insights can reduce information acquisition workload and guide future inhibitor development.
• The study provides a foundation for developing more efficient, environmentally friendly, and economical corrosion inhibitors.