Quality control
Anodes must be made of the correct alloys if they are to provide the right output voltage, avoid forming an impervious crust and be free of wasteful self destruction. Chemical analysis of each melt is made and
recorded. ISO 9001or 9002 applies. . . . Zincsmart Home
Three different materials are used.
. . . Zinc anodes are made to MIL-A-18001K
(Output 780 Ampere hours per Kg.)
Cadmium . . . . 0.025% - 0.07%
Copper . . . . . . .0.005% Max.
Iron . . . . . . . . . 0.005% Max.
Lead . . . . . . . . .0.006% Max.
Aluminium . . . . 0.1% - 0.5%
Zinc . . . . . . Remainder (special high grade 99.995%)
. . Aluminium anodes are to MIL A 24779(SH) or similar specification
(2760 Ampere hours per Kg.)
Copper . . . . . . 0.004% Max.
Iron . . . . . . . . . 0.09% Max.
Indium . . . . . . 0.014% - 0.02%
Mercury . . . . . 0.001% Max.
Silicon . . . . . . 0.08% - 0.20%
Zinc . . . . . . . . . 4.0% - 6.5%
Aluminium . . . Remainder (high grade)
. . Magnesium anodes for fresh water are usually AZ63
(1230 Ampere hours per Kg.)
Aluminium . . . . .5.3% - 6.7%
Zinc . . . . . . . . . 2.5% - 3.5%
Copper . . . . . . . 0.08% Max.
Silicon . . . . . . . . 0.3% Max.
Manganese . . . . 0.25% Min.
Iron . . . . . . . . . 0.005% Max.
Lead . . . . . . . . . 0.03% Max.
Nickel . . . . . . . 0.003% Max.
Magnesium . . . . Remainder