Galvanic/bimetallic corrosion.
Galvanic/bimetallic corrosion.
(OP)
Hi,
If we have a thermowell made out of monel k500 and a temperature gauge made of 316Lss inserted into this theromwell will galvanic/bimetallic corrosion occur between the two?
Thanks
If we have a thermowell made out of monel k500 and a temperature gauge made of 316Lss inserted into this theromwell will galvanic/bimetallic corrosion occur between the two?
Thanks
RE: Galvanic/bimetallic corrosion.
In a galvanic couple, the metal higher in the series (or the smaller) represents the anode, and will corrode preferentially in the environment. The metal with the lower number will act as an anode and will corrode preferentially.
SS 316L is in number 53 in the table
MONEL 400 is in number 63 in the table
In principle 316L will be more active or anodic than MONEL K-500
luis
RE: Galvanic/bimetallic corrosion.
If it is an environment where you might develop crevice corrosion in 316 against 316, then the couple will accelerate the corrosion.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed
RE: Galvanic/bimetallic corrosion.
DHURJATI SEN
RE: Galvanic/bimetallic corrosion.
luis
RE: Galvanic/bimetallic corrosion.
I’m not overly familiar with K500 but given it’s mechanical properties and ASME IID listing I don’t see how it could be used in a system where metal dusting would be of any concern.
Huub
- You never get what you expect, you only get what you inspect.