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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Chemical effects of Inhibited HCl on Nonmetallic elements (Like Rubber plastic and nylon)

2006

Gentleman
We have EMA hardening machine, So we are going to go thru descaling procedure for total water line. But the line includes Metal and nonmetallic components as specified above. the concentration that machine manufacturer had given is 15% Of inhibited HCl in 85% of water.
So please reply Any effects on these parts.
Please reply fast.

Ghanwat ajay
cotton - Pune, Maharashtra, India

2006

Unfortunately, there is no such thing as "like" when you are referring to whether a material can resist HCl or not, Ghanwat :-)

Rubber can handle it, nylon can't, and "plastic" is too general to answer. Vinyl and vinyl ester fiberglass, polyethylene, polypropylene, and teflon should be fine. The supplier of the machine or the supplier of the inhibited acid should have some experience in similar situations though. Good luck.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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