Inhibition and Biocide Actions of Sodium Dodecyl Sulfate-Zn2+ System for the Corrosion of Carbon Steel in Chloride Solution

Abstract

The inhibition efficiency of sodium dodecyl sulfate (SDS) in controlling corrosion of carbon steel in aqueous solution containing 120 ppm of Cl − in the presence and absence of Zn 2+ has been evaluated by weight loss method. The formulation consisting of 300 ppm of SDS and 75 ppm of Zn 2+ gives 93 % inhibition efficiency. A synergistic effect exists between SDS and Zn 2+ . As the immersion period increases, the inhibition efficiency of SDS-Zn 2+ decreases. Polarization study reveals that this formulation controls both the anodic and cathodic reactions. AC impedance spectra reveal that a protective film is formed on the metal surface.

Synergistic Effect of <i>Allium</i> <i>cepa</i>-Zn<sup>2+</sup> System on the Corrosion of Carbon Steel in Ground Water

“…A peak appeared at 265 nm, in all the cases. This confirmed the presence of Fe 2+ -AC complex formed on the anodic sites of the metal surface [33][34][35].…”

Corrosion Inhibition by an Aqueous Extract of Phyllanthus Amarus

“…SDS is an anionic surfactant. It has biocidal activity also [36]. A micelle would have been formed at the minimum efficiency concentration.…”

Corrosion Inhibition by Amino Trimethylene Phosphonic Acid (ATMP) - Zn2+ System for Carbon Steel in Ground Water

“…Analysis of the results of AC impedance spectra AC impedance spectra have been used to investigate the formation of a protective film on the metal surface [32][33][34][35][36][37][38][39][40].The AC impedance spectra of carbon steel in various solutions are shown in Fig. 2.…”