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Corrosion Inhibition of Aluminum Alloy 7613 by Dimethylethanolamin in (0.6 M) NaCl Solution | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 30, Issue 4, 2012, Pages 684-696 PDF (222.24 K) | ||
| DOI: 10.30684/etj.30.4.14 | ||
| Author | ||
| Khalid T. Rashid | ||
| Abstract | ||
| The inhibition behavior of Dimethylethanolamin (DMEA) on corrosion 7613 Aluminum alloy in 0.6 M NaCl solution have been investigated using weight loss, polarization techniques .Five different concentrations (2*10-3, 4*10-3, 6*10-3 , 8*10-3 and 10*10-3) M of (DMEA) were studded at 250 C. Also examine of temperature effect (25, 35, 45)0 C on the inhibitor efficiency .The results indicated that the inhibition occurs by absorption of inhibitor molecules on the metal surface. The inhibition efficiency (I %) was found to increase with increasing inhibitor concentration and decreasing with increasing temperature. For inhibitor concentration close to (8*10-3 M) maximum inhibition efficiency obtained was 92 %. Above this inhibitor concentration value in the solution the inhibitor efficiency decreases. Polarization measurements showed that the DMEA act as a mixed type inhibitor. The corrosion potential (Ecorr.) values shifted to less negative values by increasing the concentration of DMEA in the solution up to (8*10-3 M). Adsorption of DMEA on the surface of Aluminum is found to obey the Langmuir isotherm | ||
| Keywords | ||
| Alloy; Corrosion inhibition; Dimethylethanolamin; adsorption | ||
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