Development of a multi-component SG with CTAB as corrosion, scale, and microorganism inhibitor for cooling water systems

• Non-toxic formulation was used to inhibit corrosion, scale and biocorrosion.
• Inhibition efficiency increases with pH, electrode rotation and immersion time.
• Formulation takes its performance at height temperature.
• Formulation takes its inhibition in the presence of corrosion products.
• SEM/EDX confirm the formulation performance inhibitor after 15 days of immersion.

This work based on the study of corrosion, scale and microorganism inhibition of low carbon steel in cooling water system by organic compounds (Sodium gluconate (SG) associated with Cetyltrimethylammonium bromide (CTAB)) using electrochemical techniques and SEM/EDX analysis. The polarization curves showed that this formulation acts as mixed-type inhibitor. Its inhibition efficiency was found to enhance with increase of pH, electrode rotation and immersion time due to the formation of the inhibitor film on metallic surface as indicated by electrochemical impedance spectroscopy measurements. However, the formulation takes its performance at high temperature and in the presence of corrosion products. Finally, the SEM/EDX observations confirmed that the formulation was a corrosion, scale, and microorganism inhibitor after 15 days of immersion.

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