Beta Bz482 13.5hp engine anodes

[nathanglasgow]

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[VicS]

Expensive if you buy them. Cheap if you make them up yourself from 10mm zinc bar. Cut them to size,mount them in a normal hand drill,clamp drill in vice,use sharp chisel as a cutting tool and turn down to size. Cost of 500mm length bar was £9.99 delivered. Enough to make 16 anodes. Our Beta goes through 2 over 12 months

Not just any old zinc bar though.

The purity and concentrations of other alloying element are important. That is why the composition of anodes usually conforms to a US military specification. q.v.

Iron as an impurity cases the anode to be ineffective and has a very low maximum limit set, although other alloying elements allow this figure to be a little higher than it would otherwise be.

If you can buy zinc bar that conforms to the relevant standard that's fair enough but otherwise be warned.

 

[vyv_cox]

Not just any old zinc bar though.

The purity and concentrations of other alloying element are important. That is why the composition of anodes usually conforms to a US military specification. q.v.

Iron as an impurity cases the anode to be ineffective and has a very low maximum limit set, although other alloying elements allow this figure to be a little higher than it would otherwise be.

If you can buy zinc bar that conforms to the relevant standard that's fair enough but otherwise be warned.

Same applies to 'recycled' ones, almost certainly containing some iron from the melting container and the strap on the original anode. The level of iron that inhibits the effectiveness of an anode is of the order of thousandths of a percent. This year there has been a thread on here recounting the tale of a saildrive that was destroyed even though it had an anode protecting it. Turned out that the anode was from a cut cost supplier, so quite possibly not as pure as it might have been.

 

[G12]

The level of iron that inhibits the effectiveness of an anode is of the order of thousandths of a percent.

A very useful nugget of info....

 

[VicS]

A very useful nugget of info....

It may also be the reason wire brushing anodes is generally not advised ??????

 

[Spirit of Glenans]

It may also be the reason wire brushing anodes is generally not advised ??????

Perhaps brush them with a brass wire brush?

 

[nathanglasgow]

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[alahol2]

The midway solution is to get a CME-0BSP holder and CME-0Z/20 screw in anodes from http://www.zincsmart.com/ or get the CME-0Z screw in anode and saw it in half (crazily, it is cheaper).

 

[NickRobinson]

Bought bar from Solent Anodes ebay shop so presume they sell the right stuff! Spec is to Military. Nothing like getting shot down in flames for trying to put a helpful hint up

You need broad shoulders here! Wide range of knowledge too, though.... I'd thought of your suggestion too-:encouragement:

 

[vyv_cox]

Bought bar from Solent Anodes ebay shop so presume they sell the right stuff! Spec is to Military. Nothing like getting shot down in flames for trying to put a helpful hint up

No shooting down at all. Vic said 'not just any old zinc bar' and I referred to recycling. Neither applies to your supplier apparently.

 

[VicS]

Bought bar from Solent Anodes ebay shop so presume they sell the right stuff! Spec is to Military. Nothing like getting shot down in flames for trying to put a helpful hint up

Your hint would not have been criticised if you had included the advice to ensure that the zinc bar was to US MIL-A-18001K or suggested a source of suitable material.
As I was you just said, "zinc bar" .

All the background info and details of the spec are in fact on the Solent Anodes site.

 

[VicS]

Perhaps brush them with a brass wire brush?

Maybe or maybe not. The max copper allowed by MIL-A-18001K is the same as for iron ... 0.005%

 

[nathanglasgow]

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