Inhibition Performance and PPP Quantum Chemistry Studies of \=Benzotriazole Derivatives on Copper in NaCl Solution

The inhibition effects of four kinds of benzotriazoles derivatives: benzotriazole(BTA), 1chloridebenzotriazole(CBTA), 5nitrobenzotriazole(NBTA) and 5aminobentriazole(ABTA) were studied by weightloss method and electrochemistry polarization curves in 3% NaCl solution. The Structure parameters of these compounds were calculated by PPPSCF quantum chemistry method. The relationship between their molecular structure and inhibition effciency was also discussed. It shows that the chemisorption of electrons of these compounds has some relationship with their corrosion performance. The best inhibition effect of BTA is contributed by its accelerated passivation for Cu(I) ion.