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.

InhibitorsC (×10−2 M)Corrosion rate ×10−4 (g·h−1·cm−2)Inhibition efficiency (IE%)
293 K303 K313 K293 K303 K313 K

Mixed ligand (Arg : Glu) ratio (1 : 1)003.477.3211.58
0.012.605.939.73251916
0.022.505.649.26282320
0.032.225.208.80362924
0.041.804.768.34483528
0.051.604.397.76544033
0.061.353.226.95615640
‚ÄČ0.071.113.076.25685846

[Co(glu)·(arg)·(H2O)2]·0.5H2O0.011.462.784.28586263
0.021.282.493.71636668
0.031.082.123.13697173
0.040.971.762.90727676
0.050.831.462.08768082
0.060.871.321.62758286
0.070.731.101.15798590

[Ni(glu)·(arg)·(H2O)2]·0.5H2O0.012.194.326.60374143
0.022.014.106.14424447
0.031.773.665.44495053
0.041.533.224.98565657
0.051.352.713.94616366
0.061.152.273.47676970
0.070.972.052.90727275

[Cu(glu)·((arg)]·H2O0.012.324.767.18333538
0.022.124.256.25394246
0.031.913.885.91454749
0.041.633.375.21535455
0.051.463.074.86585858
0.061.322.714.05626365
0.071.182.343.47666870

[Zn(glu)·(arg)·(H2O)2]·H2O0.011.252.423.59646769
0.021.082.053.13697273
0.030.831.612.43767879
0.040.731.542.08797982
0.050.621.171.74828485
0.060.590.951.39838788
0.070.520.810.93858992