Corrosion Protection of Zinc Sheet in Acidic Media Using D,L-Lactic Acid as Green Corrosion Inhibitor
Abstract
This work focused on the inhibition efficiency and behavior of D,L-lactic acid (DLLA) in the corrosion of zinc-sheet in 1.0 M hydrochloric solution at 30, 40 and 50 ̊C. The corrosion reaction was followed by the hydrogen evolution technique. From kinetic results, the corrosion rate (rcorr) of zinc sheet increased with increasing temperatures but surface coverage (θ) decreased. The inhibition efficiency (%I) of DLLA dramatically decreased from 40.0 to 4.1 and 3.2% when temperature increased from 30 to 40 and 50 ̊C, respectively. The corrosion activation energies (Ea) for zinc sheet and zinc sheet with DLLA were 54.9 and 71.7 kJ/mol, respectively. Furthermore, DLLA was adsorbed on zinc sheet surface with heat of adsorption (Qads) of -117.8 kJ/mol. The obtained Qads value indicated that the adsorption of DLLA on zinc-sheet surface was exothermic.Keywords: adsorption corrosion inhibition D,L-Lactic acid kinetics zincReferences
Abiola, O.K. and James, A.O. (2010). The effects of Aloe vera extract on corrosion and kinetics of corrosion process of zinc in HCl solution, Corrosion Science, 52, 661-664.
Armstrong R.D. and Peggs, L. (1994). The behaviour of lead silicate as a corrosion inhibitor for iron and zinc, Corrosion Science, 36, 749-757.
Bhajiwala, H.M. and Vashi, R.T. (2001). Ethanolamine, Diethanolamine and Triethanolamine as Corrosion Inhibitors for Zinc in Binary Acid Mixture (HNO3 + H3PO4), Bulletin of Electrochemistry, 17, 441-448.
Ebenso, E.E., Ekpe, U.J., Ita, B.I., Offiong, E.O. and Ibok, U.J. (1999). Effect of molecular structure on the efficiency of amides and thiosemicarbazones used for corrosion inhibition of mild steel in hydrochloric acid, Materials Chemistry and Physics, 60, 79-90.
El-Etre, A.Y. (2006). Khillah extract as inhibitor for acid corrosion of SX 316 steel, Applied Surface Science, 252, 8521-8525.
El-Sayed, A.R. (2010). Corrosion inhibition of tin, indium and tin-indium alloys by adenine or adenosine in hydrochloric acid solution, Corrosion Science, 52, 72-81.
Oguzie, E.E. (2007). Corrosion inhibition of aluminum in acidic and alkaline media by Sansevieria trifasciata extract, Corrosion Science, 49, 1527-1539.
Rudresh, H.B. and Mayanna, S.M. (1980). Tertiary arsines as corrosion inhibitors for zinc in acid solution, Materials and Corrosion, 31, 286-290.
Sorkhabi, H.A., Ghasemi, Z. and Seifzadeh, D. (2006). The inhibition effect of some amino acids towards the corrosion of aluminum in 1 M HCl + 1 M H2SO4 solution, Applied Surface Science, 249, 408-418.
Tang, Y., Tang, X., Yang, W., Wan, R., Chen, Y. and Yin, Z. (2010). A preliminary investigation of corrosion inhibition of mild steel in 0.5 M H2SO4 by 2-amino-5-(n-pyridyl)-1,3,4-thiadiazole: polarization, EIS and molecular dynamics simulations, Corrosion Science, 52, 1801-1808.
Vashi, R.T., Bhajiwala, H.M. and Desai, S.A. (2010). Ethanolamines as corrosion inhibitors for zinc in (HNO3 + H2SO4) binary acid mixtures, E-Journal of Chemistry, 7, 665-668.
Armstrong R.D. and Peggs, L. (1994). The behaviour of lead silicate as a corrosion inhibitor for iron and zinc, Corrosion Science, 36, 749-757.
Bhajiwala, H.M. and Vashi, R.T. (2001). Ethanolamine, Diethanolamine and Triethanolamine as Corrosion Inhibitors for Zinc in Binary Acid Mixture (HNO3 + H3PO4), Bulletin of Electrochemistry, 17, 441-448.
Ebenso, E.E., Ekpe, U.J., Ita, B.I., Offiong, E.O. and Ibok, U.J. (1999). Effect of molecular structure on the efficiency of amides and thiosemicarbazones used for corrosion inhibition of mild steel in hydrochloric acid, Materials Chemistry and Physics, 60, 79-90.
El-Etre, A.Y. (2006). Khillah extract as inhibitor for acid corrosion of SX 316 steel, Applied Surface Science, 252, 8521-8525.
El-Sayed, A.R. (2010). Corrosion inhibition of tin, indium and tin-indium alloys by adenine or adenosine in hydrochloric acid solution, Corrosion Science, 52, 72-81.
Oguzie, E.E. (2007). Corrosion inhibition of aluminum in acidic and alkaline media by Sansevieria trifasciata extract, Corrosion Science, 49, 1527-1539.
Rudresh, H.B. and Mayanna, S.M. (1980). Tertiary arsines as corrosion inhibitors for zinc in acid solution, Materials and Corrosion, 31, 286-290.
Sorkhabi, H.A., Ghasemi, Z. and Seifzadeh, D. (2006). The inhibition effect of some amino acids towards the corrosion of aluminum in 1 M HCl + 1 M H2SO4 solution, Applied Surface Science, 249, 408-418.
Tang, Y., Tang, X., Yang, W., Wan, R., Chen, Y. and Yin, Z. (2010). A preliminary investigation of corrosion inhibition of mild steel in 0.5 M H2SO4 by 2-amino-5-(n-pyridyl)-1,3,4-thiadiazole: polarization, EIS and molecular dynamics simulations, Corrosion Science, 52, 1801-1808.
Vashi, R.T., Bhajiwala, H.M. and Desai, S.A. (2010). Ethanolamines as corrosion inhibitors for zinc in (HNO3 + H2SO4) binary acid mixtures, E-Journal of Chemistry, 7, 665-668.
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2016-12-02
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บทความวิจัยจากการประชุมวิชาการระดับชาติ"วิทยาศาสตร์วิจัย"ครั้งที่ 8
