Journal of Chemistry / 2019 / Article / Tab 8 / Research Article
Transition Metal Complexes of Mixed Bioligands: Synthesis, Characterization, DFT Modeling, and Applications Table 8 Corrosion parameters for aluminum in aqueous solution of 1M HCl in the absence and presence of different concentrations of mixed ligands and their metal complexes at different temperatures for 7 hrs.
Inhibitors C (×10−2 M)Corrosion rate ×10−4 (g·h−1 ·cm−2 ) Inhibition efficiency (IE%) 293 K 303 K 313 K 293 K 303 K 313 K Mixed ligand (Arg : Glu) ratio (1 : 1) 00 3.47 7.32 11.58 — — — 0.01 2.60 5.93 9.73 25 19 16 0.02 2.50 5.64 9.26 28 23 20 0.03 2.22 5.20 8.80 36 29 24 0.04 1.80 4.76 8.34 48 35 28 0.05 1.60 4.39 7.76 54 40 33 0.06 1.35 3.22 6.95 61 56 40 0.07 1.11 3.07 6.25 68 58 46 [Co(glu)·(arg)·(H2 O)2 ]·0.5H2 O 0.01 1.46 2.78 4.28 58 62 63 0.02 1.28 2.49 3.71 63 66 68 0.03 1.08 2.12 3.13 69 71 73 0.04 0.97 1.76 2.90 72 76 76 0.05 0.83 1.46 2.08 76 80 82 0.06 0.87 1.32 1.62 75 82 86 0.07 0.73 1.10 1.15 79 85 90 [Ni(glu)·(arg)·(H2 O)2 ]·0.5H2 O 0.01 2.19 4.32 6.60 37 41 43 0.02 2.01 4.10 6.14 42 44 47 0.03 1.77 3.66 5.44 49 50 53 0.04 1.53 3.22 4.98 56 56 57 0.05 1.35 2.71 3.94 61 63 66 0.06 1.15 2.27 3.47 67 69 70 0.07 0.97 2.05 2.90 72 72 75 [Cu(glu)·((arg)]·H2 O 0.01 2.32 4.76 7.18 33 35 38 0.02 2.12 4.25 6.25 39 42 46 0.03 1.91 3.88 5.91 45 47 49 0.04 1.63 3.37 5.21 53 54 55 0.05 1.46 3.07 4.86 58 58 58 0.06 1.32 2.71 4.05 62 63 65 0.07 1.18 2.34 3.47 66 68 70 [Zn(glu)·(arg)·(H2 O)2 ]·H2 O 0.01 1.25 2.42 3.59 64 67 69 0.02 1.08 2.05 3.13 69 72 73 0.03 0.83 1.61 2.43 76 78 79 0.04 0.73 1.54 2.08 79 79 82 0.05 0.62 1.17 1.74 82 84 85 0.06 0.59 0.95 1.39 83 87 88 0.07 0.52 0.81 0.93 85 89 92