Analysis of inhibition mechanism in aluminum corrosion using magnesium citrate

Research has been conducted with the title Analysis of Mechanism of Inhibition on Aluminum Corrosion Using Magnesium Citrate. The method used in this research is the experimental method through using linear polarization resistance which has the chance to be patented and offered to companies producing materials made of aluminum. By using this methods the effort is to extends the inhibitor type of the magnesium salt of citrate and to explains the mechanism of reaction of aluminum corrosion inhibition to the corrosion rate in acidic atmosphere. The results achieved in this study are to have the magnesium citrate can inhibit corrosion of pure aluminum at 60 ppm, acidic atmosphere (pH 3), temperature 25°C. The efficiency of magnesium citrate inhibition using linear polarization resistance was 89.36%., the reflective spectral FTIR spectrometry showed that aluminum with magnesium citrate inhibitors that in the 3000-1750 cm⁻¹ spectrum (OH-group Al₂O₃), 1380-1100 cm⁻¹ (AlO⁻) groups, 1000-950 cm⁻¹ (C = O) groups, and 800-600 cm-1 (O-Mg groups), high performance liquid chromatography (HPLC) analysis and UV spectrometry analysis obtained respectively by inhibitor adsorbed on the aluminum surface of 0.0495 mol and 0.0610 mol of magnesium citrate for each 1 g of 100 mesh aluminum powder, the optical microscopy (MO) analysis showed that by the addition of magnesium inhibitor from the anion of amphiphole citrate to pure aluminum then on the aluminum surface corrosion of formed wells does not appear or in other words its existence can be prevented