Chemical resistance of 304/304L
Chemical resistance of 304/304L
(OP)
Does a lower carbon content for stainless steel 304L (instead of 304L) also has an influence on the chemical restistance?
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Chemical resistance of 304/304L
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Chemical resistance of 304/304LChemical resistance of 304/304L(OP)
Does a lower carbon content for stainless steel 304L (instead of 304L) also has an influence on the chemical restistance?
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RE: Chemical resistance of 304/304L
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RE: Chemical resistance of 304/304L
In our case we have one process where we oxidize organics with HNO3 using 304L SS as the primary MOC. There is direct relationship between the general corrosion rate experienced and the %C in the base metal. Historically as the processing of SS has improved we have continually decreased the max. C when specifying 304L stainless steel from 0.030/0.035 to the present max. of 0.015.
This effect is most evident in our large 304L storage tanks. We map the location of each plate and compare the corrosion rate on each plate vs the chemistry.
In another process where we remove organic peroxides we again used 304L with with carbon as low as obtainable.
RE: Chemical resistance of 304/304L
In most services though the reason that higher C material does not preform as well is that it is not annealed fully. If you use an electrochemical test for determining senitization you will be amazed (dismayed) at how badly annealed commercial product can be. Even 304L from mills often has trace amounts of carbides in grain boundaries.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm