Abstract
Potentiodynamic and cyclic voltammetric studies were carried out on nickel in borate buffered saline (pH = 8.49). The anodic excursion spans of nickel in borate buffer solution do not involve active/passive transition. The passive film starts to break down in the presence of Cl-ions, which causes pitting damage. The data reveal that the increasing Cl− concentration and solution temperature shifts the Epit to the active direction while the increasing in scan rate shifts the Epit to the positive direction. The pitting potential (Epit) shifted in a positive direction when increasing concentrations of Wo4−2 and MoO4−2 anions were added to a borate buffer solution containing Cl− ions, showing that the additional anions had an inhibitory influence on the pitting corrosion. While the NO3− anion is ineffectual as an inhibitor and rather speeds up pitting corrosion, the NO2− anion has a slight inhibitory impact on pitting corrosion.
Funding source: Taif University Researchers Supporting Project
Award Identifier / Grant number: TURSP – 2020/19
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: Taif University Researchers Supporting Project number (TURSP – 2020/19), Taif University, Saudi Arabia.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Data availability: The datasets used and/or analysed during the current study available from the corresponding author on reasonable request.
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