Corrosion Inhibition of Mild Steel in Hydrochloric Acid by Tannins Rom Rhizophora Racemosa
作者： Makanjuola Oki , Ebitei Charles , Collins Alaka , Tambari Kayode Oki
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摘要: Studies on the corrosion behaviour of mild steel electrodes in inhibited hydrochloric acid are described. Conventional weight loss measurements show that a maximum concentration 140 ppm tannin from Rhizophora racemosa is required to achieve 72% inhibition. Similar tannin: H3PO4 ratio 1:1 gave 61% inhibition efficiency, whereas efficiency obtained for phosphoric as inhibitor same environment was 55%. Corrosion rates over six hours exposure 1M HCl solution at concentrations 2 mA/cm2, 2.4 2.6 mA/cm2 and 6 tannin, tannin/H3PO4 H3PO4-inhibited uninhibited specimens respectively. Natural atmospheric studies revealed treated resisted three weeks, while suffered attack after one week tests.
sci-hub.st 参考文章(14)
Einar Bardal, Corrosion and Protection ,(2014)
M. Abdallah, E.A. Helal, A.S. Fouda, Aminopyrimidine derivatives as inhibitors for corrosion of 1018 carbon steel in nitric acid solution Corrosion Science. ,vol. 48, pp. 1639- 1654 ,(2006) , 10.1016/J.CORSCI.2005.06.020
Irving Langmuir, THE ADSORPTION OF GASES ON PLANE SURFACES OF GLASS, MICA AND PLATINUM. Journal of the American Chemical Society. ,vol. 40, pp. 1361- 1403 ,(1918) , 10.1021/JA02242A004
Pandian Bothi Raja, Mathur Gopalakrishnan Sethuraman, Inhibitive effect of black pepper extract on the sulphuric acid corrosion of mild steel Materials Letters. ,vol. 62, pp. 2977- 2979 ,(2008) , 10.1016/J.MATLET.2008.01.087
Pandian Bothi Raja, Mathur Gopalakrishnan Sethuraman, Natural products as corrosion inhibitor for metals in corrosive media — A review Materials Letters. ,vol. 62, pp. 113- 116 ,(2008) , 10.1016/J.MATLET.2007.04.079
A. Bouyanzer, B. Hammouti, L. Majidi, Pennyroyal oil from Mentha pulegium as corrosion inhibitor for steel in 1 M HCl Materials Letters. ,vol. 60, pp. 2840- 2843 ,(2006) , 10.1016/J.MATLET.2006.01.103
Emeka E. Oguzie, Studies on the inhibitive effect of Occimum viridis extract on the acid corrosion of mild steel Materials Chemistry and Physics. ,vol. 99, pp. 441- 446 ,(2006) , 10.1016/J.MATCHEMPHYS.2005.11.018
G. Nonaka, Isolation and structure elucidation of tannins Pure and Applied Chemistry. ,vol. 61, pp. 357- 360 ,(1989) , 10.1351/PAC198961030357
L.R. Chauhan, G. Gunasekaran, Corrosion inhibition of mild steel by plant extract in dilute HCl medium Corrosion Science. ,vol. 49, pp. 1143- 1161 ,(2007) , 10.1016/J.CORSCI.2006.08.012
Amornvadee Veawab, Paitoon Tontiwachwuthikul, Amit Chakma, Investigation of low-toxic organic corrosion inhibitors for CO2 separation process using aqueous MEA solvent Industrial & Engineering Chemistry Research. ,vol. 40, pp. 4771- 4777 ,(2001) , 10.1021/IE010248C