International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Inhibiting effect of N,N,N-Trimethyldodecylammonium bromide on Corrosion of mild Steel in 0.5M Sulphuric acid solution, its Adsorption and Kinetic Characteristics

Author Affiliations

  • 1Department of chemistry, BNM Institute of Technology, Bengaluru-70, INDIA
  • 2 Department of chemistry, RAMCO Institute of Technology, Rajapalayam, Tamil Nadu- 626 117, INDIA
  • 3 Department of chemistry, Dr. Ambedkar Institute of Technology, Bengaluru, INDIA

Res. J. Material Sci., Volume 2, Issue (5), Pages 1-10, October,16 (2014)


The corrosion behavior of mild steel in 0.5M Sulphuric acid containing different concentrations of N,N,N-trimethyldodecylammonium bromide (TDAB) has been studied by weight loss, Tafel polarization and Electrochemical impedance spectroscopic techniques at 298, 308, 318 and 328K respectively. The mild steel samples were also analyzed by scanning electron microscopy. Electrochemical and impedance parameters such as corrosion potential, corrosion current density, Tafel slopes, charge transfer resistance and electrical double layer were determined. The kinetic and thermodynamic parameters for mild steel corrosion and inhibitor adsorption, respectively, were determined and discussed. The results showed that concentration of Inhibitor and test temperatures can affect the % inhibition efficiency. The % corrosion inhibition efficiency increases with increase in concentration and decreases with increase in temperature. The maximum corrosion inhibition efficiency obtained is 95.5%. As the inhibitor concentration increased, the charge transfer resistance increased and double layer capacitance decreased. It was found that TDAB is an excellent inhibitor for mild steel in acidic medium. Adsorption of the inhibitor molecules on the mild steel surface obeyed the Langmuir adsorption isotherm. On the basis of thermodynamic adsorption parameters, comprehensive adsorption for the studied inhibitor on mild steel surface was suggested.


  1. Dourna Asefi., Mokhtar Arami., Niyaz Mohammad sMahmoodi., Electrochemical effect of cationic gemini surfactant and halide salts on corrosion inhibition of low carbon steel in acidic medium, ECS Transaction., 33(30), 1-16 (2011)
  2. Atia A.A. and M.M. Saleh., Inhibition of acid corrosion of steel using cetylpyridinium chloride, J. Appl. Electrochem., 33, 171, (2013)
  3. Dourna Asefi., Ali asghar Sarabi and Mokhtar Arami.,Corrosion Inhibition Effect of Cationic Surfactant and Synergistic Effect of the Presence of the Chloride Ions, ECS transaction, 19, 135-140 (2009)
  4. Fouda A.S., H.K. AbdEl-Aziz and Y.A. Elewady.,Corrosion inhibition of carbon steel by cationic surfactants in 0.5M HCl solution, Journal of chemical science and Technology, 1(2), 45-53( 2012)
  5. Kumar Harish and Sunita., ADS, ALS, AHDS and ADDBS Surfactants as Corrosion Inhibitors for Carbon Steel in acidic Solution, Research journal of chemical sciences, 2(7),1-6 (2012)
  6. Free M.L., Understanding the effect of surfactant aggregation on corrosion inhibition of mild steel in acidic medium, Corros. Sci.,44, 2865 (2002)
  7. Kalpana Bhrara., Gurmeet Singh and Hansung Kim., Inhibiting effects of Butyl triphenyl phosphonium bromide on corrosion of mild steel in 0.5M sulphuric acid solution and its adsorption characteristics, Corrosion Sci.,50, 2747-2754 (2008)
  8. Mishra A.K. and R. Balasubramaniam., Corrosion inhibition of Aluminium Alloy 6061 by Rare Earth Chloride, Corrosion., 63(3), 240-248 (2007)
  9. Behpour M., S.M. Ghoreishi, N. Soltani and M. Salavati-Niasari., The inhibition effect of some bis- n-bidentate schiff bases on corrosion behavior of 304 stainless steel in hydrochloric acid solution, Corros.Sci.,51, 1073 (2009)
  10. Szauer T. and A. Brandt., On the role of fatty acid in adsorption and corrosion inhibition of iron by amine-fatty acid salts in acidic solution, Electrochim. Acta.,26, 1257-1260 (1981)
  11. Solmaza R., G. Karda., M. Çulha., B. Yazici, and M. Ebril., Investigation of adsorption and inhibitive effect of 2- mercaptothiazoline on corrosion of mild steel in hydrochloric acid media, Electrochim. Acta, 53, 5941-5952 (2008)
  12. Prathibha B.S., P. Kotteeswaran and V. Bheemaraju.,Study on the inhibition of mild steel corrosion by quaternary ammonium compounds in sulphuric acid medium, Res. J. Rescent Sci., 2(4), 1-10(2013)