I would not recommend stainless steel where there are free chloride
ions. Use titanium.
Brian
Adam Seychell wrote:
> Does anyone know if stainless steel 316 corrodes when exposed to
> alkaline ammonia chloride etchants ? I have this diaphragm pump with
> internal stainless steel fasteners which are exposed to the etchant. The
> pump elastomers are EPDM and santoprene, and body material is glass
> filled polypropylene. I am wondering if the pump can be used for
> alkaline etchants.
>
> For a test I placed some stainless steel in etchant at let standing for
> one week. There was no visible surface corrosion, nor any measurable
> mass loss. I know this doesn't tell me I can use the pump and expect it
> to last.
>
>
> best regards,
> Adam Seychell
>
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