I have been offered needle valves with A350 body, for OS&Y bolting, supplier suggests super duplex bolts instead of L7.
Will it represent galvanic corrosion problems ?
Thank you,
A350 and super duplex
Oct 20, 2006
3 Replies
These are 1" needle valve, A350 LF2 body
IMHO, minor - the super duplex needle stem is cathodic with respect to the A350 valve body (anode) - the valve body has the larger surface area - same area effect as seen in the use of brass valves in domestic water service with A53 steel pipes. BTW - the properties of the fluid that valve control will constitute the dominate corrosion mechanism(s).
Ed Vojcak
Thank you Ed,
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