Joshua  Olusegun Okeniyi, Esther  Titilayo Akinlabi, Jacob  Olumuyiwa Ikotun, Olugbenga  Adeshola Omotosho, 
    Anticorrosion Performance of K<sub>2</sub>CrO<sub>4</sub> on Mild Steel in 0.5 M HCl,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 22,
    2019,
    Pages 8273-8281,
    ISSN 1816-949x,
    jeasci.2019.8273.8281,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.8273.8281)
    Abstract: In this study, the anticorrosion performance of K<sub>2</sub>CrO<sub>4</sub> (potassium chromate) on mild steel in 0.5 M 
HCl environment was studied. Samples of mild steel were immersed in the 0.5 HCl medium containing different
concentrations of the K<sub>2</sub>CrO<sub>4</sub> and the corrosion of the samples were monitored using Gravimetric method and 
potentiodynamic polarization technique by Linear Sweep Voltammetry (LSV) instrument. Results by the two
corrosion monitoring techniques showed that the inhibition efficiency was increasing as K<sub>2</sub>CrO<sub>4</sub> concentration 
increased, even as this effectiveness increment was more prominently observed in the electrochemical
monitoring technique of potentiodynamic polarization. By this, the inhibition mechanism by the K<sub>2</sub>CrO<sub>4</sub> was 
characterized as predominantly anodic. Fitting of the experimental data to adsorption isotherm models identified
the Langmuir adsorption isotherm as having the best-fit for the metal-inhibitor interaction mechanism. This
indicated spontaneous and favourable adsorption as well as physisorption as the prevalent mechanism of
K<sub>2</sub>CrO<sub>4</sub> adsorption on the mild steel surface. These results exhibit potency of mild steel corrosion protection 
in many industrial applications employing hydrochloric acid and in which mild steel is used as construction
material.
    Keywords: K2CrO4;weight loss;linear sweep voltammetry;corrosion rate;adsorption isotherm;mild steel