Electrochemical testing data for "Investigation on the Corrosion Resistance of SS316L under the Combined Effect of Shot Peening and Corrosion Inhibitor"
| Main Author: | Gunister, Ebru |
|---|---|
| Other Authors: | Johnson, Prince, Rostron, Paul, AlFantazi, Akram |
| Format: | Dataset |
| Terbitan: |
Mendeley
, 2019
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| Subjects: | |
| Online Access: |
https:/data.mendeley.com/datasets/t34d9sssbx |
Daftar Isi:
- The combined effect of shot peening and application of Imidazole as a corrosion inhibitor on the electrochemical behavior of austenitic stainless steel (SS316L) in a high chloride environment was investigated. SS316L specimens were shot-peened according to AMS 2430 standard. Electrochemical experiments were conducted using the Princeton Applied Research PARSTAT 2273 Potentiostat/Galvanostat for shot-peened and unpeened specimens in the presence and absence of corrosion inhibitor (25 ppm Imidazole) in an aerated environment with a concentration of 3.5wt.% NaCl. Specimens were labelled as using N for untreated (not peened), S for shot-peened, 1 for non CI, and 2 for 25 ppm Imidazole addition environment. As an example, S2 used as a label for shot-peened samples with 25 ppm Imidazole used as corrosion inhibitor. The results analysed by using Electrochemistry Powersuite software. A graphite electrode that has a diameter of 10 mm was used as a counter electrode (CE) and an Ag/AgCl (3M) was used as reference electrode (RE). Working electrodes (WE) were shot-peened and unpeened SS316L with an area of 17.4 cm2 of samples. The electrolytic cell was made of a 600 ml Pyrex glass flask with four entrances on the top lid for RE, WE, CE, and aeration/ de-aeration. The surfaces of the WE were polished to mirror finish. Firstly, WE were immersed in the electrolyte to determine the open circuit potential (OCP) which was correlated to the corrosion potential. Then linear polarization resistance (LPR) was performed to determine the rate of corrosion by monitoring the relationship between electrochemical potential and current generated between the electrically charged electrodes. Tafel polarization curves were constructed, both anodic and cathodic branches were plotted for all samples. The EIS was conducted to compare and validate the Rp obtained from LPR results.the Nyquist plot is the real impedance (Zre) against the imaginary impedance (Zim) and the curve obtained is the charge transfer resistance (Rct) validated Rp at the limit of low frequency.