Data on inhibitive performance of chloraphenicol drug on A315 mild steel in acidic medium

The inhibitive characteristics of A315 mild steel in 0.1 M solution of Hydrochloric Acid with varied concentrations of the inhibitor (chloramphenicol drug) was studied using weight loss (gravimetry) technique, open circuit potential (OCP) and linear polarization method. The experimental data obtained from the methods used shows that an increase in inhibition efficiency of the inhibitor is characterized by a decrease in corrosion rate. Hence, chloramphenicol drug is an efficient corrosion inhibitor for Mild Steel in Hydrochloric acid medium.


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The inhibitive characteristics of A315 mild steel in 0.1 M solution of Hydrochloric Acid with varied concentrations of the inhibitor (chloramphenicol drug) was studied using weight loss (gravimetry) technique, open circuit potential (OCP) and linear polarization method. The experimental data obtained from the methods used shows that an increase in inhibition efficiency of the inhibitor is characterized by a decrease in corrosion rate. Hence, chloramphenicol drug is an efficient corrosion inhibitor for Mild Steel in Hydrochloric acid medium.
& 2018 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Subject area
Materials Science Engineering More specific subject area Corrosion Engineering Type of data The concentration of chloramphenicol drug (as corrosion inhibitor) was varied during the electrochemical process. The mild steel coupons were abraded with emery papers of three grades (P609, P1000C and P1200A) and the surface became very smooth and silver coloured.
To remove any surface impurities that arose from cutting and polishing of the mild steel coupons, distilled water was used to wash the cut squares thoroughly. And acetone was used to rinse the cut squares which were then dried at ambient temperature before been stored in a desiccator before usage.

Experimental features
Mild steel coupons after pretreatment were used for the electrochemical experiment. The electrochemical process was performed using Autolab potentiostat galvanostat equipment (PGSTAT 101), NOVA 2.1 software and a 3-electrode cell containing 100 ml of 0.1 M Hydrochloric acid (with and without inhibitor) at 30°C. A graphite rod was used as the auxiliary electrode, silver chloride electrode (Ag/AgCl) was used as the reference electrode and the mild steel coupon was connected to a specimen holder to serve as the working electrode.
Potentiodynamic study was carried out by considering À 1.5 to þ1.5 voltage range at a scan rate of 0.005 V/s. Linear sweep voltammetry (LSV) staircase was conducted and corrosion current was measured for each of the experimental runs. The Tafel plots of potential E(V) against log current (I) were generated to obtain corrosion potential (Ecorr) and corrosion current density (jcorr). Also, the corrosion rate and inhibition efficiency were evaluated using NOVA 2.

Value of the data
The given data will enable authors in Corrosion Engineering profession the inhibitive behavior of chloramphenicol in acidic medium.
The data can be used to examine the relationship between the process variables (as such inhibitor concentration, exposure time) and inhibition efficiency.
The data could be used to obtain the inhibition efficiency of chloramphenicol (as inhibitor) at any given inhibitor concentration.
The data acquired revealed that Langmuir adsorption model was the most suitable adsorption model.

Data
The weight loss, corrosion rate inhibition efficiency, surface coverage and OCP values of the uninhibited and inhibited samples were determined during the electrochemical process using chloramphenicol as the corrosion inhibitor. These data are presented in Table 1 and Figs. 1-8.

Materials and methods
Mild steel coupons after pretreatment were used for the electrochemical experiment. The electrochemical process was performed using Autolab potentiostat galvanostat equipment (PGSTAT 101), NOVA 2.1 software and a 3-electrode cell containing 100 ml of 0.1 M Hydrochloric acid (with and without inhibitor) at 30°C. A graphite rod was used as the auxiliary electrode, silver chloride electrode (Ag/AgCl) was used as the reference electrode and the mild steel coupon was connected to a specimen holder to serve as the working electrode, as carried out in previous work [1,2].   The bath preparation for electrochemical (corrosion) process was designed with varied concentration of chloramphenicol as corrosion inhibitor (2.5-10%). Total time duration of 360 h was considered for the experiment, but with intermittent weighing of the mild steel in every 72 h [1][2][3][4].
Potentiodynamic study was carried out by considering À 1.5 to 1.5 voltage range at a scan rate of 0.005 V/s. Linear sweep voltammetry (LSV) staircase was conducted and corrosion current was measured for each of the experimental runs. The Tafel plots of potential E(V) against log current (I) were generated to obtain corrosion potential (Ecorr) and corrosion current density (jcorr). Also, the corrosion rate and inhibition efficiency were evaluated using NOVA 2.1 software.

Transparency document. Supporting information
Supplementary data associated with this article can be found in the online version at http://dx.doi. org/10.1016/j.dib.2018.05.108.