Corrosion Mitigation of Aluminium in 3.65% NaCl Medium Using Hexamine

  • O. S. I. FayomiEmail author
  • I. G. Akande


This study reports the performance of Hexamine as a useful corrosion inhibitor on Aluminium alloy in 3.65% NaCl at ambient temperature and a constant pH of 7. The corrosion-protective ability of Hexamine was investigated utilizing potentiodynamic polarization procedures, computational studies and mass loss estimates. The result from the research unveils that Hexamine hinders the corrosion of Aluminium alloy in sodium chloride solution. The inhibition effect was due to the blockage of the active site of the metal surface by the adsorbed molecule of Hexamine thereby forming a thin layer which minimizes the intrusion of chloride ion into the mobile sites of Aluminium alloy, leading to the reduction of corrosion current density. The deteriorations in mass by the inhibited Aluminium alloy were discovered to decrease as the mass of mass concentration of Hexamine increases. The outcome of the experiment indicated that Hexamine offered inhibition performance of 47.1%, which may likely increase as mass concentration increases. Polarization curve confirmed that Hexamine in 3.65% NaCl at ambient temperature behaved as a mixed-type inhibitor, reducing the corrosion rate and increasing the polarization potential. Adsorption of Hexamine molecules on the Aluminium alloy was attested to follow Langmuir adsorption isotherm with correlation regression coefficient (R2) value of 0.8408. The Morphology study via SEM micrograph affirms the adsorption of Hexamine molecules on the surface of the Aluminium alloy.


Hexamine Aluminium Inhibition Langmuir and corrosion 


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringCovenant UniversityOtaNigeria
  2. 2.Department of Mechanical EngineeringUniversity of IbadanIbadanNigeria
  3. 3.Department of Chemical, Metallurgical and Materials EngineeringTshwane University of TechnologyPretoriaSouth Africa

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