TY  - JOUR
T1  - Anticorrosion Performance of K<sub>2</sub>CrO<sub>4</sub> on Mild Steel in 0.5 M HCl
AU - Olusegun Okeniyi, Joshua AU - Titilayo Akinlabi, Esther AU - Olumuyiwa Ikotun, Jacob AU - Adeshola Omotosho, Olugbenga 
JO  - Journal of Engineering and Applied Sciences
VL  - 14
IS  - 22
SP  - 8273
EP  - 8281
PY  - 2019
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2019.8273.8281
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2019.8273.8281
KW  - K2CrO4
KW  -weight loss
KW  -linear sweep voltammetry
KW  -corrosion rate
KW  -adsorption isotherm
KW  -mild steel
AB  - 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.
ER  -