phosphor bronze for keel bolts
phosphor bronze for keel bolts
(OP)
We are putting a new keel on a 52foot 1918 copper sheathed admiralty launch. The old bolts appear to be a copper alloy, probably one of the bronzes. I am considering using phosphor bronze to make the bolts. Would a nickel aluminium bronze (admiralty bronze) be much better? Anyone know how well the phosphor bronze would perform in seawater near the copper sheathing.





RE: phosphor bronze for keel bolts
RE: phosphor bronze for keel bolts
The galvanic series in sea wateris:
1. copper, ~-0.3 to -0.37V (sacrificial metal)
2. 410/416 stainless (passive), ~-0.23 to -0.35V
3. silicon bronze, ~-0.25 to -0.29V
4. nickel aluminium bronze. ~-0.14 to -0.22V
The best choice would seem to be 410/416 (passive) stainless or silicon bronze.
RE: phosphor bronze for keel bolts
RE: phosphor bronze for keel bolts
RE: phosphor bronze for keel bolts
Thank you