Research on Inhibiting Performance of Compound Corrosion Inhibitors Based on Nitrite

Table 2

Compound proportion of corrosion inhibitors (%).

	Number	Volume		Number	Volume
NaNO2	N1	0.5	Na2HPO4	P1	0.5
	N2	1.0		P2	1.0
	N3	1.5		P3	1.5
	N4	2.0		P4	2.0
	N5	2.5		P5	2.5
Composite	A1	0.5 + 1.5	Composite	C1	1.5 + 0.5
	A2	0.5 + 2.0		C2	1.5 + 1.0
	B1	1.0 + 1.0		C3	1.5 + 1.5
	B2	1.0 + 1.5		D1	2.0 + 0.5
	B3	1.0 + 2.0		D2	2.0 + 1.0

Note: another blank control group, BLK, is not added with the corrosion inhibitor.