The Roles of Alkyl Branches of Ionic Liquid in the Corrosion Resistance of Pb/Sb/Sn Grids Alloy in Lead-Acid Battery

Table 1

Corrosion data for Pb 1.6 wt% Sb alloy in 4.0 mol·L⁻¹ H₂SO₄ in presence and absence of ionic liquids obtained from Tafel polarization and electrochemical impedance spectroscopy methods.

Sample	Concentration of IL (𝜇gcm^−3)	Tafel measurements				EIS measurements
		𝐸corr (mV)	𝑖corr (𝜇Acm^−2) Error (±2–4%)	C.R. (mpy) Error (±2–4%)	IE%	𝑅𝑡 (Ω)	IE%
Without IL		−597	14.42	27165.66		178.7
HAHS	5	−596	10.03	18877.56	30.50
	10	−589	14.46	27213.94	0.22
	15	−589	16.16	30432.62	12.03	133.9	33.45
	20	−594	17.57	33104.13	21.80
MCHAHS	5	−589	9.87	18587.88	31.54
	10	−593	9.36	17638.37	35.11
	15	−594	12.53	20808.77	13.14	281.3	36.47
	20	−589	11.05	23609.03	23.40
THAHS	5	−584	7.27	13695.49	49.60
	10	−588	9.99	18829.28	30.68
	15	−594	13.75	25910.37	4.68	240.1	25.57
	20	−596	12.28	23126.22	14.87
BCHAHS	5	−584	7.29	13727.67	49.46
	10	−588	6.78	12778.16	52.97
	15	−594	6.03	11345. 85	58.18	307.4	58.13
	20	−596	6.42	12086.15	55.51