Corrosion rate difference between Hastelloy C276 and Hastelloy B?
Corrosion rate difference between Hastelloy C276 and Hastelloy B?
(OP)
Can someone tell me the difference between these two for low temperature/low concentrations of HCl?
Thanks.
Thanks.





RE: Corrosion rate difference between Hastelloy C276 and Hastelloy B?
RE: Corrosion rate difference between Hastelloy C276 and Hastelloy B?
If there is water failure the vapor temperature entering below the packed bed is 80F, concentration is ~100% HCl, with the possible trace solvents mentioned above.
RE: Corrosion rate difference between Hastelloy C276 and Hastelloy B?
If the purpose of the scrubbing is to remove HCl, that's one thing. If the purpose is to MAKE concentrated HCl, then you'd need B or even refractory materials.
B is vulnerable to even traces of oxidizing species in the mix. Fe+3 is particularly bad. But C grades are pretty resistant at low temperature. I posted a link to a NiDI paper on the subject recently in a similar thread- have a look.