Corrosion inhibition of carbon steel by sodium benzoate in 3% by weight NaCl solution

Abstract EN

In this study, the inhibitor effect of Sodium Benzoate on carbon steel corrosion in a solution for NaCl was investigated.

The experiment was carried in solution contain 3% by weight of sodium chloride at room temperature and pH = 7 (neutral solution) as well as the investigations repeated under different temperature (30, 40, and 50 °C) on the other hand the effect of pH was investigated by repeat the experiment with different pH (3, 5, 7, and 9), it is found the effect of inhibitor was decrease with increasing temperature and it was increase with increase the solution pH.

Sodium Benzoate has been shown to be an effective inhibitor of the corrosion of carbon steel in a moderately hard mains-water and very dilute (e.

g.) sodium chloride solutions.

As well as study shows that Sodium Benzoate is less efficient, it is a safe inhibitor since it does not lead to localized corrosion when its concentration is just below the minimum for protection.