Electrodeposited Reduced Graphene Oxide Films on Stainless Steel, Copper, and Aluminum for Corrosion Protection Enhancement

Table 1

Corrosion parameters for uncoated and graphene coated specimens in seawater at different temperature.

Material	°C					Rp	WL	PL		PE%
		mV versus SCE	mA·cm^−2	mV·dec^−1	mV·dec^−1	Ω·cm^2	Mg·m^−2d^−1	mm·y^−1
Uncoated SS	20	−179.2	27.00	113.8	101.6	801.5	6.75	0.3024
	30	−194.7	31.23	125.7	106.5	581.1	7.80	0.3497
	40	−202.2	44.34	141.3	102.3	446.5	11.08	0.4966
	50	−215.6	59.23	137.3	109.5	257.8	14.80	0.6633
Reduced GO coated SS	20	−65.4	1.22	116	192.1	3881.7	0.30	0.0136	0.954	95.4
	30	−172.2	6.51	111.7	121.5	1262.3	1.62	0.0729	0.791	79.1
	40	−171.6	13.46	76.5	80.1	1719.9	3.36	0.1507	0.696	69.6
	50	−167.8	16.04	98.5	179	501.8	4.01	0.1796	0.729	72.9
Uncoated Cu	20	−206.6	25.61	251	80.3	1031.4	7.27	0.2970
	30	−204.9	30.95	338.7	90.7	1003.7	8.78	0.3590
	40	−211.3	47.41	322.6	90.8	648.9	13.46	0.5499
	50	−222.3	56.4	278.7	88.8	518.4	16.01	0.6542
Reduced GO coated Cu	20	−145.1	6.01	72.3	58.3	2331.8	1.70	0.0697	0.765	76.5
	30	−140.8	10.66	53.5	47	1019.1	3.02	0.1236	0.655	65.5
	40	−155.3	15.95	59.2	58.5	801.0	4.52	0.1850	0.663	66.3
	50	−173.1	18.76	59.2	59.4	686.2	5.32	0.2176	0.667	66.7
Uncoated Al	20	−635.7	239.38	378.7	105.7	149.8	67.98	2.7768
	30	−713.5	267.93	318.8	79.2	102.8	76.09	3.1079
	40	−676.5	317.33	424.4	103.7	114.0	90.12	3.6810
	50	−693.2	375.11	416.6	90.8	86.2	106.53	4.3512
Reduced GO coated Al	20	−647.9	88.22	75.0	72.1	180.9	25.05	1.0233	0.631	63.1
	30	−670.1	94.54	81.0	73.4	176.8	26.84	1.0966	0.647	64.7
	40	−644.2	115.01	101.9	74	161.8	32.66	1.3341	0.637	63.7
	50	−735.0	118.7	98.4	95.5	177.2	33.71	1.3769	0.683	68.3