Inhibition effect of butan-1-ol on the corrosion behavior of austenitic stainless steel (Type 304) in dilute sulfuric acid |
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| Authors: | RT Loto CA Loto API Popoola T Fedotova |
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| Institution: | 1. Department of Mechanical Engineering, Covenant University, Ota, Ogun State, Nigeria;2. Department of Chemical, Metallurgical & Materials Engineering, Tshwane University of Technology, Pretoria, South Africa |
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| Abstract: | The electrochemical behavior of austenitic stainless steel (Type 304) in 3 M sulfuric acid with 3.5% recrystallized sodium chloride at specific concentrations of butan-1-ol was investigated with the aid of potentiodynamic polarization, open circuit measurement and weight loss technique. Butan-1-ol effectively inhibited the steel corrosion with a maximum inhibition efficiency of 78.7% from weight-loss analysis and 80.9% from potentiodynamic polarization test at highest concentration studied. Adsorption of the compound obeyed the Freundlich isotherm. Thermodynamic calculations reveal physiochemical interactions and spontaneous adsorption mechanism. Surface characterizations showed the absence of corrosion products and topographic modifications of the steel. Statistical analysis depicts the overwhelming influence and statistical significance of inhibitor concentration on the inhibition performance. |
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| Keywords: | Corresponding author at: Department of Mechanical Engineering Covenant University Ota Ogun State Nigeria Tel : +234 8084283392 Corrosion Adsorption Steel Butan-1-ol |
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