Table 5.

The results of the corrosion rate, K (g/m² d) and metal corrosion inhibition efficiency, IE (%) of the synthesized CS and the different nanoparticles capped by the CS (ZnNPs-C-CS, MnNPs-C-CS, and SnNPs-C-CS) against the isolated Pseudomonas sp. (R301) at 3.5% NaCl.

Samples	Concentration (mM)	Mean Corrosion Rate, K (g/m2 d)	Metal Corrosion Efficiency, IE (%)
Negative control	-	1.940 ± 0.020	0
Positive control	-	1.407 ± 0.070	27.4
CS	1.25	0.275 ± 0.010	85.7
	0.625	0.627 ± 0.002	67.6
	0.312	0.927 ± 0.010	52.2
	0.156	1.250 ± 0.090	35.5
ZnNPs-C-CS	1.25	0.221 ± 0.008	88.6
	0.625	0.431 ± 0.004	77.7
	0.312	0.602 ± 0.010	68.9
	0.156	0.819 ± 0.020	57.7
MnNPs-C-CS	1.25	0.115 ± 0.010	94.0
	0.625	0.368 ± 0.020	81.0
	0.312	0.542 ± 0.030	72.0
	0.156	0.767 ± 0.060	60.4
SnNPs-C-CS	1.25	0.059 ± 0.005	96.9
	0.625	0.158 ± 0.007	91.8
	0.312	0.549 ± 0.002	71.7
	0.156	0.647 ± 0.020	66.6