Aluminium Spelters

Chemical Composition

ELEMENT	Al-Zn-In Si	Al-Zn-In Cd	Al-Zn-In Sn	Al-Zn-In Mg-Sn
Zn	2.8 - 6.5	2.5 - 4.5	2.2 - 5.2	2.5 - 4.0
In	0.017 - 0.025	0.018 - 0.050	0.020 - 0.045	0.020 - 0.050
Si	0.08 - 0.20	0.10 % max	0.10 % max	0.10 % max
Cd	-	0.005 - 0.020	-	-
Sn	-	-	0.018 - 0.035	0.025 - 0.075
Mg	-	-	-	0.50 - 1.00
Fe	0.12 % max	0.12 % max	0.12 % max	0.12 % max
Cu	0.006 % max	0.01 % max	0.01 % max	0.01 % max
Other	0.02 % max	0.02 % max	0.02 % max	0.02 % max
Aluminium	Remaining	Remaining	Remaining	Remaining

Electrochemical Properties

Theoretical Current Capacity	2970 A.hour/kg – 3.15 kg/A.year
Anod Current Efficiency	90 % min
True Current Capacity	2675 A.hour/kg – 3.50 kg/A.year
Elektrod Potential (Cu/CuSO4)	1100 mV
Circuit Potential against Steel	250 mV
Density	2.80 g/cm³

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Zinc Spelters

Chemical Composition

ELEMENT	MIL-SPEC. A-18001 J ASTM-B418-95a TYPE I	ASTM-B418-95a TYPE II
Al	0.1 - 0.5	0.005 - 0.020
Cd	0.025 - 0.07	0.003 % max
Fe	0.005 % max	0.0014 % max
Pb	0.006 % max	0.003 % max
Cu	0.005 % max	0.002 % max
Zinc	remaining	remaining

Electrochemical Properties

Electrical Properties	MIL-SPEC. A-18001 J ASTM-B418-95a TYPE I	ASTM-B418-95a TYPE II
Theoretical Current Capacity	820 A.hour/kg 10.66 kg/A.year	820 A.hour/kg 10.66 kg/A.year
Anod Current Efficiency	95 %	90 %
True Current Capacity	780 A.hour/kg 11.22 kg/A.year	740 A.hour/kg 11.84 kg/A.year
Potential ( Cu/CuSO4 )	1100 mV	1100 mV
Circuit Potential against Steel	250 mV	250 mV
Density	7.13 g/cm³	7.14 g/cm³

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