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Shaft Globe Anodes

Z Guard marine anodes
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Shaft Globe Anodes

Shaft Globe Anodes:


Shaft anodes are mounted on the shafts of small leisure vessels to protect the exposed steel prolonging the life of the shafts and propellers. Zinc is the only material that has an official specification, the American MIL-A-18001 K spec. Zinc is a well-proven anode material, and its capacity is virtually unaffected by the operating current density, although the driving voltage diminishes with increasing temperature therefore it has limited application. If zinc is not to this specification i.e. high purity zinc 99.99%, it will have a limited use as an anode material because of iron present as an impurity.

Some sizes also available in aluminium for use in brackish/salt water.

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Shaft Globe Anodes

Shaft Diameter Size Anode Diameter  Anode Length  Zinc Weight (kg) Aluminium Weight (kg)
3/4" 54mm (2-1/8") 54mm (2-1/8") 0.51 NA
7/8" 54mm (2-1/8") 54mm (2-1/8") 0.47 NA
1" 54mm (2-1/8") 54mm (2-1/8") 0.45 0.17
1-1/8" 54mm (2-1/8") 54mm (2-1/8") 0.39 0.16
1-1/4" 60mm (2-3/8") 64mm (2-1/2") 0.53 0.21
1-3/8" 64mm (2-1/2") 64mm (2-1/2") 0.77 0.25
1-1/2" 64mm (2-1/2") 64mm (2-1/2") 0.75 0.24
1-3/4" 83mm (3-1/4") 73mm (2-7/8") 1.15 NA
2" 83mm (3-1/4") 73mm (2-7/8") 0.91 NA
2-1/4" 105mm (4-1/4") 95mm (3-3/4") 2.74 NA
2-1/2" 105mm (4-1/4") 95mm (3-3/4") 2.33 NA
2-3/4" 121mm (4-3/4") 92mm (3-5/8") 3.15 NA
3" 121mm (4-3/4") 92mm (3-5/8") 2.7 NA
25mm 54mm (2-1/8") 54mm (2-1/8") 0.45 0.18
30mm 64mm (2-1/2") 60mm (2-3/8") 0.8 0.31
35mm 64mm (2-1/2") 64mm (2-1/2") 0.68 0.27
40mm 90mm (3-9/16") 63mm (2-7/8") 2.02 0.79
45mm 90mm (3-9/16") 63mm (2-7/8") 1.84 NA
50mm 90mm (3-9/16") 63mm (2-7/8") 1.66 NA
60mm 108mm (4-1/4") 95mm (3-3/4") 2.55 NA
Z Guard marine anodes