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<p><i>Pichia kudriavzevii</i> isolated from green grapes (<i>Vitis&#xa0;vinifera</i>) fruit utilized as a potential candidate for inhibition of mild steel corrosion (MS) via biofilm formation in 0.5&#xa0;M sulphuric acid. Biofilm formed on MS is analyzed through various spectral (UV–visible, FTIR, XPS), analytical (XRD, FE-SEM, EDX, AFM, BET), and electrochemical (OCP, EIS, PDP) techniques are used to evaluate the inhibition efficiency of the <i>Pichia kudriavzevii</i> isolate. <i>Pichia kudriavzevii</i> isolate exhibited maximum inhibition potential (95.76%) for the optimal concentration of 10 × 10<sup>6</sup>&#xa0;CFU/mL at 288&#xa0;K by weight-loss method. Monolayer adsorption obeys the Langmuir adoption model. Negative ∆G* value supports the adsorption of inhibitor on MS is a spontaneous reaction. <i>Pichia kudriavzevii</i> isolate displays a mixed-type of corrosion inhibition behavior against MS in 0.5&#xa0;M sulphuric acid medium and an increased trend of charge transfer resistance values while increasing inhibitor concentration. A suitable mechanism for formation of biofilm via adherence of <i>Pichia kudriavzevii</i> isolate over MS surface is discussed.</p>

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Investigation of Corrosion Inhibition Potential of Pichia kudriavzevii Isolated from Green Grapes (Vitis vinifera) Against Mild Steel in 0.5 M Sulphuric Acid: Adsorption, Electrochemical Surface Analysis and Thermodynamic Study

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Baluchamy Tamilselvi,
  • Annamalai Karthika,
  • K. Gurushantha,
  • Sethuramasamy Padmavathy,
  • Durvas Seshian Bhuvaneshwari,
  • Periyakaruppan Karuppasamy

摘要

Pichia kudriavzevii isolated from green grapes (Vitis vinifera) fruit utilized as a potential candidate for inhibition of mild steel corrosion (MS) via biofilm formation in 0.5 M sulphuric acid. Biofilm formed on MS is analyzed through various spectral (UV–visible, FTIR, XPS), analytical (XRD, FE-SEM, EDX, AFM, BET), and electrochemical (OCP, EIS, PDP) techniques are used to evaluate the inhibition efficiency of the Pichia kudriavzevii isolate. Pichia kudriavzevii isolate exhibited maximum inhibition potential (95.76%) for the optimal concentration of 10 × 106 CFU/mL at 288 K by weight-loss method. Monolayer adsorption obeys the Langmuir adoption model. Negative ∆G* value supports the adsorption of inhibitor on MS is a spontaneous reaction. Pichia kudriavzevii isolate displays a mixed-type of corrosion inhibition behavior against MS in 0.5 M sulphuric acid medium and an increased trend of charge transfer resistance values while increasing inhibitor concentration. A suitable mechanism for formation of biofilm via adherence of Pichia kudriavzevii isolate over MS surface is discussed.