Hastelloy type for hydrochloride acid and sodium hydroxide
Hastelloy type for hydrochloride acid and sodium hydroxide
(OP)
I need to specify a metal for the construction of a sample valve. The fluids are hydrochloride acid and sodium hydroxide. My guess is some hastelloy type (B or C) but what type is best resistant to both acid an akalic fluid?
Thanks for your help/tips
Thanks for your help/tips
RE: Hastelloy type for hydrochloride acid and sodium hydroxide
I will try to find you some corrosion data for "C" type alloys in in caustic.
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Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: Hastelloy type for hydrochloride acid and sodium hydroxide
Thanks for your quick repley. The conditions are as follows:
HCl 30% 5 barg @ 60 deg C / NaOH 22% 5 barg @ 60 deg C.
RE: Hastelloy type for hydrochloride acid and sodium hydroxide
Good luck.
Biggy
RE: Hastelloy type for hydrochloride acid and sodium hydroxide
"Good" is defined as <20 mils/year.
HCl Dilute 20% 35% 38% 50%
Hastelloy B/B-2 180 220 200 140 80
Hastelloy C/C-276 160 150 140 140 80
NaOH 10% 15% 30% 50% 70% Conc
Hastelloy B/B-2 230 210 250 250 220 200
Hastelloy C/C-276 230 210 210 210 220 120