International Journal of Metals

Research Article

A Comparative Study of the Inhibitory Effect of Gum Exudates from Khaya senegalensis and Albizia ferruginea on the Corrosion of Mild Steel in Hydrochloric Acid Medium

Table 1

Summary of GC-MS results from peaks in KS gum spectrum.


Line number	%C	Compound	MF	MW	RT	Fragmentation peaks

1	6.22	alpha-Thujene/origanene	C₁₀H₁₆	136	6.9	27 (15%), 41 (15%), 43 (15%), 65 (10%), 77 (50%), 93 (100%), 105 (2%), 121 (2%), and 136 (10%)
2	20.31	Myrcene	C₁₀H₁₆	136	7.1	27 (15%), 41 (20%), 53 (10%), 67 (100%), 77 (35%), 93 (100%), 105 (10%), 121 (20%), and 136 (10%)
3	1.39	Camphene	C₁₀H₁₆	136	7.4	27 (20%), 39 (30%), 53 (20%), 67 (30%), 79 (40%), 93 (100%), 107 (30%), 121 (60%), and 136 (20%)
4	1.90	4(10)-Thujene (bicyclo[3.1.0]hexane)	C₁₀H₁₆	136	8.0	27 (25%), 41 (40%), 43 (15%), 69 (15%), 77 (40%), 93 (100%), 105 (2%), 121 (10%), and 136 (20%)
5	2.61	Nopinen/pseudopinen	C₁₀H₁₆	136	8.1	27 (20%), 41 (60%), 53 (15%), 69 (40%), 77 (30%), 93 (100%), 105 (2%), 121 (15%), and 136 (15%)
6	1.39	2,6-Dimethylhepta-1,5-diene	C₁₀H₁₆	136	8.5	27 (20%), 41 (100%), 53 (20%), 69 (80%), 77 (25%), 93 (100%), 107 (8%), 121 (10%), and 136 (5%)
7	2.37	Limonene/cajepetene	C₁₀H₁₆	136	9.6	27 (40%), 39 (60%), 53 (45%), 68 (100%), 79 (40%), 93 (65%), 107 (20%), 121 (20%), and 136 (25%)
8	3.01	Verbenol	C₁₀H₁₆O	152	11.6	27 (35%), 41 (65%), 43 (40%), 59 (55%), 79 (60%), 94 (100%), 109 (90%), 119 (30%), and 137 (20%)
9	1.14	alpha-Campholenal	C₁₀H₁₆O	152	12.0	27 (15%), 39 (20%), 55 (20%), 67 (25%), 81 (20%), 93 (55%), 108 (100%), 119 (5%), 137 (2%), and 152 (2%)
10	7.24	cis-Verbenol	C₁₀H₁₆O	152	12.8	27 (35%), 41 (60%), 43 (40%), 59 (50%), 79 (60%), 94 (100%), 109 (100%), 119 (30%), and 137 (20%)
11	2.61	Myrtenol	C₁₀H₁₆O	152	14.3	27 (20%), 41 (40%), 43 (20%), 67 (20%), 79 (100%), 91 (50%), 108 (40%), 119 (30%), 134 (20%), and 152 (10%)
12	0.67	Carvacrol	C₁₀H₁₆O	152	14.8	27 (10%), 41 (32%), 55 (35%), 69 (20%), 83 (30%), 84 (55%), 109 (100%), 119 (20%), 137 (10%), and 152 (10%)
13	2.91	Diisopropenyl-1-methyl-1-vinylcyclohexane	C₁₅H₂₄	204	31.8	27 (32%), 41 (100%), 53 (60%), 68 (100%), 81 (100%), 93 (80%),107 (40%), 121 (35%), 133 (15%), 147 (20%), 161 (15%), and 189 (15%)
14	8.44	o-Menth-8-ene-4-methanol	C₁₅H₂₆O	222	33.2	27 (12%), 39 (18%), 43 (38%), 59 (100%), 81 (50%), 93 (70%), 107 (40%), 121 (30%), 135 (22%), 147 (10%), 161 (40%), 189 (20%), and 204 (10%)
15	28.82	Nerolidol isobutyrate	C₁₉H₃₂O₂	292	33.3	41 (42%), 43 (100%), 69 (25%), 71 (50%), 93 (30%), 107 (10%), 121 (40%), 127 (5%), 143 (2%), and 161 (2%)
16	6.23	2-Methylene cholestan-3-ol	C₂₈H₄₈O	400	34.0	65 (10%), 69 (100%), 81 (75%), 95 (70%), 105 (35%), 121 (25%), 133 (15%), 149 (15%), and 161 (10%)
17	0.81	7-Hexadecenal	C₁₆H₃₀O	238	35.2	41 (80%), 55 (90%), 71 (78%), 85 (50%), 98 (40%), 121 (40%), 135 (20%), and 141 (10%)
18	1.93	5 alpha-pregnane-12,20-dione	C₂₃H₃₆OS₂	392	39.9	43 (80%), 67 (25%), 81 (35%), 95 (18%), 105 (20%), 119 (40%), 131 (15%), 145 (20%), 159 (10%), 189 (8%), 203 (5%), 229 (10%), 255 (50%), 299 (10%), 331 (10%), 349 (20%), 350 (4%), 364 (4%), and 392 (100%)