Corrosion Inhibition effect of Antimony Potassium Tartrate for Q235 Carbon Steel in NaCl Solutions

The inhibition effect of antimony potassium tartrate on the corrosion of Q235 Carbon Steel in NaCl solutions was studied through weight loss measurement, potentiodynamic polarization, scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Thermodynamic calculations were carried out to explore the adsorption mechanism of antimony potassium tartrate. The results showed that antimony potassium tartrate can inhibit the corrosion of Q235carbon steel in a 0.01M NaCl solution. A maximum inhibition efficiency of 63.5% was observed in the presence of 400 ppm of antimony potassium tartrate. In a 0.01M NaCl + 0.15 M NaHCO3 solution, the inhibition efficiency increased drastically and reached 95.6% in the presence of 300 ppm of antimony potassium tartrate. Both chemical and physical adsorption occurred, and the Langmuir isotherm model was found to accurately describe the process.