Corrosion Resistant Coating from Nano Printed Circuit Board Powder for the Reinforced Concrete Structures

Table 4

Comparison of modulus of elasticity of the specimens.

S.no	Specimen	Corrosion level (percentage of sodium chloride)	Yield stress (MPa)	Ultimate stress (MPa)	Yield strain	Ultimate strain	Modulus of elasticity (×10^5) MPa
1	Noncoated	Noncorroded	426.21	528.50	0.00670	0.12462	2.160
		2 V (3.5%)	386.40	479.14	0.00260	0.04836	2.010
		2 V (10%)	371.54	460.71	0.00250	0.04650	1.930
		4 V (3.5%)	308.05	381.98	0.00250	0.04643	1.980
		4 V (10%)	296.20	367.29	0.00240	0.04464	1.901
		6 V (3.5%)	171.37	212.50	0.00255	0.04739	1.960
		6 V (10%)	164.78	204.33	0.00245	0.04557	1.882
2	Zinc coated	2 V (3.5%)	417.41	517.60	0.00374	0.06964	2.120
		2 V (10%)	401.36	497.69	0.00360	0.06696	2.035
		4 V (3.5%)	379.08	470.06	0.00364	0.06770	1.970
		4 V (10%)	364.50	451.98	0.00350	0.06510	1.891
		6 V (3.5%)	323.70	401.39	0.00370	0.06886	1.964
		6 V (10%)	311.25	385.95	0.00356	0.06622	1.885
3	Nano PCB-coated	2 V (3.5%)	431.34	534.86	0.00395	0.07351	2.130
		2 V (10%)	414.75	514.29	0.00380	0.07068	2.045
		4 V (3.5%)	380.10	471.33	0.00390	0.07254	1.970
		4 V (10%)	365.48	453.20	0.00375	0.06975	1.891
		6 V (3.5%)	329.51	408.60	0.00379	0.07041	1.960
		6 V (10%)	316.84	392.88	0.00364	0.06770	1.882