A study of tetrazoles derivatives as corrosion inhibitors of copper in nitric acid

被引：61
作者：
Mihiti, M.
Salghi, R.
El Issami, S.
Bazzi, L.
Hammouti, B. [1 ]
Addi, El. Ait
Kertit, S.
机构：
[1] Fac Sci, Lab Chim Eaux & Corros, Oujda, Morocco
[2] Fac Sci Agadir, Equipe Chim Mol & Corros, Chim Phys Lab, Agadir, Morocco
[3] Ecole Natl Sci Appl Agadir, Lab Environm & Sci Eau, Agadir, Morocco
[4] ESOA, Ecole Super Opt, Rabat, Morocco
来源：
PIGMENT & RESIN TECHNOLOGY | 2006年 / 35卷 / 03期
关键词：
copper; corrosion; acids; corrosion inhibitors;
D O I：
10.1108/03699420610665184
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Purpose - To evaluate the effect of some tetrazole compounds as corrosion inhibitors of copper in HNO3 at various temperatures. Design/methodology/approach - 1 -phenyl-5-mercapto-1,2,3,4-tetrazole (PMT) was selected as the best inhibitor among the tetrazole compounds tested. Gravimetric and electrochemical techniques were conducted. Findings - PMT was an excellent inhibitor for copper in acid. Its efficiency attained 97.5 per cent and decreased slightly with temperature. Research limitations/implications - The inhibition efficiency increased with the concentration of PMT to reach 97.5 per cent at 10(-3) M. Good agreement between the various methods explored was observed. Polarisation measurements also showed that PMT acted as a mixed inhibitor. Practical implications - The efficiency of PMT increased with the concentration but decreased with rise of temperature in the 298-333 K range. As such, PMT could be used in chemical cleaning and pickling processes. Originality/value - The originality of this work was the finding of an efficient inhibitor (PMT) having a nearly 100 per cent efficiency.
引用
收藏
页码：151 / 157
页数：7
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