[Terrapreta] Terrapreta Digest, Vol 16, Issue 25

[Kurt Treutlein]

Sean K. Barry wrote:
> I don't know, Kurt.  Does plain steel stand up to abrasion by carbon?
>  
> Regards,
>  
> SKB
Depends on what you mean by "stand up to".
Damn sight cheaper for a start. Coat it with rubber and it would likely 
last quite a while. Close tolerances don't seem to be a requirement, as 
the lumps of charcoal considered seem to be quite big. Titanium is nice 
in high temperature situations, which would not be the case when pumping 
slurry in a planter.

regards,

Kurt