Galvanic Series of Metals in Seawater ex Professional Boatbuilder Number 100 April / May 2006

Each metal has a unique voltage potential - Half-cell reference electrode, silver / silver chloride listed below: The voltage difference between any two represents the potential for corrosion.

				Metals and Alloys	Corrosion Potential Range in Volts
	A	L	N	Magnesium and Magnesium Alloys	-1.60	to	-1.65
	N	e	o	Zinc	-0.98	to	-1.03
	O	a	b	Galvanised Steel or Galvanised Wrought Iron	NA	to	NA
	D	s	l	Aluminium Alloys	-0.76	to	-1.00
	I	t	e	Cadmium	-0.70	to	-0.73
	C			Mild Steel	-0.60	to	-0.71
				Wrought Iron	-0.60	to	-0.71
				Cast Iron	-0.60	to	-0.71
				13% Chromium Stainless Steel, Type 410 [Active in still water]	-0.46	to	-0.58
				18 / 8 Stainless Steel, Type 304 [Active in still water]	-0.46	to	-0.58
				Ni-Resist	-0.46	to	-0.58
				18.8, 3% Mo Stainless Steel, Type 316 [Active in still water]	-0.43	to	-0.54
				Inconel (78% Ni, 14.5 %Cr, 6%Fe [Active in still water])	-0.35	to	-0.46
				Aluminium Bronze (92% Cu, 8% Al)	-0.31	to	-0.42
				Naval Brass (60% Cu, 39% Zn)	-0.30	to	-0.40
				Yellow Brass (65% Cu, 15% Zn)	-0.30	to	-0.40
				Red Brass (85% Cu, 15% Zn)	-0.30	to	-0.40
				Muntz Metal (60% Cu, 40% Zn)	-0.30	to	-0.40
				Tin	-0.31	to	-0.33
				Copper	-0.30	to	-0.57
				50-50 Lead - Tin Solder	-0.28	to	-0.37
				Admiralty Brass (71% Cu, 28% Zn, 1% Sn)	-0.28	to	-0.36
				Aluminium Brass (76% Cu, 22% Zn, 2% Al)	-0.28	to	-0.36
				Manganese Bronze (58.5% Cu, 39% ZN, 1% Sn, 1% Fe, 0.3% Mn)	-0.27	to	-0.34
				Silicon Bronze (96% Cu max, 0.8% Fe, 1.5% Zn, 0.2% Sn, 0.75% Mn, 1.6% Sn)	-0.26	to	-0.29
				Bronze, Composition G (88% Cu, 2% Zn, 10% Sn)	-0.24	to	-0.31
				Bronze, Composition M (88% Cu, 3% Zn, 6.5% Sn, 1.5% Pb)	-0.24	to	-0.31
				13% Chromium Stainless Steel, Type 401 Passive	-0.26	to	-0.35
				90% Cu - 10% Ni	-0.21	to	-0.28
				75% Cu - 20% Ni - 5% Zn	-0.19	to	-0.25
				Lead	-0.19	to	-0.25
				70% Cu - 30% Ni	-0.18	to	-0.23
				Inconel (78% Ni, 13.5% Cr, 56% Fe) Passive	-0.14	to	-0.17
	C			Nickel 200	-0.10	to	-0.20
	A			18/8 Stainless Steel, Type 304, Passive	-0.05	to	-0.10
	T			70% Ni - 30% Cu Monel 400, K-500	-0.04	to	-0.14
	H	M	N	18.8  - 3% Mo Stainless Steel, Type 316, Passive	0.00	to	-0.10
	O	o	o	Titanium	-0.05	to	+0.06
	D	s	b	Hasteloy C	-0.03	to	+.08
	I	t	l	Platinum	+0.19	to	+0.25
	C		e	Graphite	+0.20	to	+0.30