Electrochemical, Isotherm, and Material Strength Studies of Cucumeropsis mannii Shell Extract on A515 Grade 70 Carbon Steel in NaCl Solution

Table 12

Chemical composition of A515 Grade 70 CS with and without CMSE.

Material	Element compositions (%)
	Fe	C	Mn	P	Si	S	Cl	O
A515 Grade 70 CS (coupon)	98.00	0.35	1.20	0.035	0.375	0.040	—	—
A515 Grade 70 CS (with CMSE)	93.61	0.28	1.11	0.031	0.351	0.032	0.396	4.19
A515 Grade 70 CS (without CMSE)	80.77	0.19	1.03	0.026	0.333	0.028	2.073	15.55