SS Rust
SS Rust
(OP)
Hello Stainless Guru's
I am an injection molder in the medical industry. We are having a rust problem on some of our 420&440 SS molds. I am trying to identify the source of the rust. the molds are cooled with 70F water and the plastic melt temps are around 400F-460F.The material is Polypropylene. The other day we ran a dry cycle with no plastic and the mold components still rusted. Is the rust comping from wear?? how is our stainless rusting??
Sources of rust on stainless?
I am an injection molder in the medical industry. We are having a rust problem on some of our 420&440 SS molds. I am trying to identify the source of the rust. the molds are cooled with 70F water and the plastic melt temps are around 400F-460F.The material is Polypropylene. The other day we ran a dry cycle with no plastic and the mold components still rusted. Is the rust comping from wear?? how is our stainless rusting??
Sources of rust on stainless?





RE: SS Rust
Regards
StoneCold
RE: SS Rust
SC has listed the most common causes. Do some research.
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Still trying to help you stop corrosion.
formerly Trent Tube, now Plymouth Tube
eblessman@plymouth.com
or edstainless@earthlink.net
RE: SS Rust
RE: SS Rust
It's also possible that the material in the mold you bought is not actually what you think it is. Metal does get, ahem, accidentally misidentified, from time to time.
Did you by chance have the molds made offshore?
Mike Halloran
Pembroke Pines, FL, USA
RE: SS Rust
That's the problem with martensitic stainless. Any slight difficulty in corrosivity of the environment or material preparation can leave you exposed to corrosion. There isn't any room for error.
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/
RE: SS Rust
S.
http://www.corrosionist.com