Synthesis, characterisation and corrosion inhibition screening: Cu[EtBenzdtc]2 and Cu[BuMedtc]2 / Nur Alia Atiqah Alias ... [et al.]

Alias, Nur Alia Atiqah and Zolkifli, Nabilah Syakirah and Mohd Radzi, Mimi Wahidah and Dzulkifli, Nur Nadia (2021) Synthesis, characterisation and corrosion inhibition screening: Cu[EtBenzdtc]2 and Cu[BuMedtc]2 / Nur Alia Atiqah Alias ... [et al.]. Journal of Academia, 9. pp. 56-65. ISSN 2289-6368

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Abstract

Mild steel plays an essential part in many construction industries due to its low cost and excellent mechanical properties. However, the use of strong acid in pickling, construction, and oil refining processes adds to a serious corrosion problem for mild steel. Two Cu(II) dithiocarbamate (DTC) complexes were successfully synthesised, namely Cu(II) ethyl-benzyl DTC (Cu[EtBenzdtc]2) and Cu(II) butyl-methyl DTC (Cu[BuMedtc]2) complexes, by a condensation reaction and subsequently used to scrutinise the corrosion resistance activity towards mild steel in acidic media. The proposed structures of complexes were characterised by using the Fourier transform infrared (FTIR) and ultraviolet-visible (UV-Vis) spectroscopies. The melting point for Cu[EtBenzdtc]2 was found around 362–375°C, and 389–392°C for Cu[BuMedtc]2. The percentages of Cu(II) found in Cu[EtBenzdtc]2 and Cu[BuMedtc]2 were 7.6% and 7.5%, respectively. Both complexes were non-electrolyte based on the molar conductivity analysis. Their corrosion inhibition performances were tested by using a weight loss measurement. Cu[BuMedtc]2 showed a good result as a corrosion inhibitor compared to Cu[EtBenzdtc]2. The complexes showed good effectiveness in sulfuric acid (H2SO4) compared to hydrochloric acid (HCl) solution. Furthermore, Cu[BuMedtc]2 showed a good result as a corrosion inhibitor compared to Cu[EtBenzdtc]2 with the highest percentage of corrosion inhibition recorded at 91.8%. Meanwhile, the highest percentage of corrosion inhibition shown by Cu[EtBenzdtc]2 was only 86.9%. The lowest corrosion rate shown for Cu[BuMedtc]2 was 8.1944×10-4 cm-1 h-1. Meanwhile, the Cu[EtBenzdtc]2 showed the lowest corrosion rate only at 1.3194×10-3 cm-1 h-1. This implies that Cu[BuMedtc]2 showed lower corrosion rate but higher inhibition efficiency compared to Cu[EtBenzdtc]2.

Metadata

Item Type: Article
Creators:
Creators
Email
Alias, Nur Alia Atiqah
UNSPECIFIED
Zolkifli, Nabilah Syakirah
UNSPECIFIED
Mohd Radzi, Mimi Wahidah
UNSPECIFIED
Dzulkifli, Nur Nadia
UNSPECIFIED
Subjects: Q Science > QD Chemistry > Extraction (Chemistry)
T Technology > TP Chemical technology > Chemical engineering > Special processes and operations
T Technology > TP Chemical technology > Chemicals > Acids
Divisions: Universiti Teknologi MARA, Negeri Sembilan
Journal or Publication Title: Journal of Academia
UiTM Journal Collections: UiTM Journal > Journal of Academia (JoA)
ISSN: 2289-6368
Volume: 9
Page Range: pp. 56-65
Item ID: 47818
Uncontrolled Keywords: Synthesis, characterisation, corrosion inhibition screening, Cu[EtBenzdtc]2, Cu[BuMedtc]2
URI: https://ir.uitm.edu.my/id/eprint/47818

ID Number

47818

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