U ovom radu istraženo je djelovanje novosintetiziranog organskog spoja, 3- hidroksi-4-hidroksiiminometil-5-hidroksimetil-2-metil-1-(4'-nitrofenacil) piridinijevog bromida, na procese korozije uzoraka legure AlMg3, izloženih djelovanju otopina (0,1 M HCl i 3 %-tna NaCl). Određivanja su provedena gravimetrijskom metodom, pri temperaturama od 25°C, 55°C, 70°C i 80°C. Istraživani spoj je dodan otopinama (0,1 M HCl i 3 %-tna NaCl), u koncentracijama 10-3, 10-4 i 10-5 mol L-1. Na osnovu vrijednosti brzina korozije uzoraka legure AlMg3, određene su vrijednosti energija aktivacije. Novosintetizirani organski spoj djeluje kao inhibitor korozije uzoraka legure AlMg3, u 0,1 M otopini HCl i u 3 %-tnoj otopini NaCl. Na nižim temperaturama najbolje djelovanje ima otopina spoja koncentracije 10-5 mol L-1, a pri višim temperaturama otopina spoja koncentracije 10-3 mol L-1.

The effect of 3-hidroxy-4-hydroxyiminomethyl-5-hidroxymethyl-2-methyl-1-(4'- nitrophenacyl) pyridinium bromide on the process of corrosion of the AlMg3 alloy samples in 0,1 M HCl and 3 % NaCl. The rates were determined by gravimetric analysis, at temperatures 25°C, 55°C, 70°C and 80°C. The concentrations of investigated molecule, added into the solutions (0,1 M HCl and 3 % NaCl), were 10-3, 10-4 and 10-5 mol L-1.The activation energies were determined based upon the rates of corrosion. The investigated molecule shows protection of AlMg3 samples against corrosion in 0,1 M HCl and 3 % NaCl. The best inhibitory effect, at lower temperature, has a solution of investigated molecule with concentration 10-5 mol L-1, and at higher temeratures, the solution with concentration 10-3 mol L-1.