Metals which are resistant to Hydrochloric Acid (33%) & Caustic Soda
Metals which are resistant to Hydrochloric Acid (33%) & Caustic Soda
(OP)
Good Morning,
We have a Customer who has a existing Fire Sprinkler system protecting his premises. The factory produces Plastic Coated Freezer Baskets. Within the manufacturing process, the wire baskets are dipped in both 33% conc. hydrochloric acid and caustic soda (presumably as cleaning agents). Above the baths, the existing mild steel pipework is showing signs of corrosion as are the none ferrous (gunmetal / dzr) sprinkler heads (these are turning green, presumably verdigris due to dezinctification?). Would anyone be able to advise the optimum choice of material/s to resist this combination of chemical attack please?
Many thanks in anticipation of your assistance.
We have a Customer who has a existing Fire Sprinkler system protecting his premises. The factory produces Plastic Coated Freezer Baskets. Within the manufacturing process, the wire baskets are dipped in both 33% conc. hydrochloric acid and caustic soda (presumably as cleaning agents). Above the baths, the existing mild steel pipework is showing signs of corrosion as are the none ferrous (gunmetal / dzr) sprinkler heads (these are turning green, presumably verdigris due to dezinctification?). Would anyone be able to advise the optimum choice of material/s to resist this combination of chemical attack please?
Many thanks in anticipation of your assistance.





RE: Metals which are resistant to Hydrochloric Acid (33%) & Caustic Soda
It sounds like they need a lot better air handling and ventilation.
I have seen epoxy coated stainless used for fire suppression piping in severe applications. You can get stainless heads as well. The only source that comes to mind is Victaulic, but suppose that all of the big players make them.
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RE: Metals which are resistant to Hydrochloric Acid (33%) & Caustic Soda
tom
Thomas J. Walz
Carbide Processors, Inc.
www.carbideprocessors.com
RE: Metals which are resistant to Hydrochloric Acid (33%) & Caustic Soda
We wrap a lot of piping and steel with the products from Denso.
http://www.densona.com/index.htm
RE: Metals which are resistant to Hydrochloric Acid (33%) & Caustic Soda
Also, the general area ventilation needs upgrading. The sprinkler pipes may only be the [tip of the iceberg.' In many metal finishing plants, chemical vapors combine with water vapor condensing in the insulation on the roof underside, also attacking the superstructure, lighting & other electrical.