کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1468994 | 1510016 | 2014 | 11 صفحه PDF | دانلود رایگان |
• 1,3-Dibenzylthiourea/DBTU and 1-benzyl-3-diisopropylthiourea/DPTU were studied.
• DPTU and DBTU act as good corrosion inhibitors for C-steel in acid solution.
• The inhibition efficiency of DPTU and DBTU increased with concentration.
• DBU did not act as an effective corrosion inhibitor for C-steel in acid solution.
• The sulphur atom may play an important role in the inhibition process.
The behaviour of 1,3-dibenzylthiourea (DBTU) and 1-benzyl-3-diisopropylthiourea (DPTU) have been investigated as carbon steel corrosion inhibitors in HCl solution by weight loss measurements, potentiodynamic polarization curves, electrochemical impedance and scanning electron microscopy analysis. Quantum chemical calculation was applied to correlate electronic structure parameters of thiourea derivatives with their inhibition performances. DPTU results were slightly superior to those obtained in the presence of DBTU, showing that the replacement of one benzyl group for two isopropyl groups enhances the inhibitory properties. The 1,3-dibenzylurea derivative has also been studied in order to assess the importance of the sulphur atom to the inhibitory effect.
Figure optionsDownload as PowerPoint slide
Journal: Corrosion Science - Volume 79, February 2014, Pages 108–118