TY  - JOUR
T1  - Corrosion Behaviour of Mild Steel in 0.5 M Sulphuric Acid
Media in the Presence of Potassium Chromate
AU - Olusegun Okeniyi, Joshua AU - Akintoye Loto, Cleophas AU - Olumuyiwa IKOTUN, Jacob AU - Adeshola Omotosho, Olugbenga AU - Patricia Idowu Popoola, Abimbola 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 14
SP  - 5789
EP  - 5795
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.5789.5795
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.5789.5795
KW  - adsorption isotherm
KW  -Tafel slope
KW  -potentiodynamic polarization
KW  -weight loss
KW  -Corrosion
KW  -physical
KW  -adsorption
AB  - This research investigates the behaviour of K<sub>2</sub>CrO<sub>4</sub> on mild steel corrosion in 0.5 M H<sub>2</sub>SO<sub>4</sub> at ambient temperature of 30&#146;C. The study was conducted using weight loss and potentio-dynamic polarization
measurements. Data were recorded from the weight loss tests while the readout from the potentiostat was
documented. Adsorption studies were also carried out. Furthermore, an investigation was conducted using
surface coverage against concentration plot to determine when the best surface would be obtained during the
experiment. Results from the study revealed that inhibitor efficiency increased as inhibitor concentration
increased. The potentio-dynamic polarization plot also identified the inhibition mechanism of action as mixed
but predominantly anodic type inhibition with maximum E<sub>corr</sub> displacement of 68 mV. The adsorption of the inhibitor agrees with the Langmuir adsorption isotherm while the separation factor which is a component of the
Langmuir expression showed a favourable adsorption. The Gibbs free energy of adsorption showed negative
value (-9.8 kJ/mol) depicting a spontaneous process with a prevalence of physical adsorption. The first day
curve showed the best surface coverage values across all inhibitor concentrations utilized.
ER  -