Corrosion on hastelloy
Hi everyone,
I have a unique (hopefully) corrosion issue that I am looking for some input. I recently ran some corrosion tests on a very simply organic solvent (very common) + aqueous HCl system ( HCl is about 2wt% and lower, total mass basis). I tested metal coupons (316L SS, HC-22, HC-276, and Ultimet Cobalt 6B). All of the coupons corroded at 50C (1-30days) and the microscope images show what could be intergranular corrosion (like I can see the grain boundaries). I want to test if there is any other metals and alloys that can withstand this solution. I have Titanium Gr 2, 5, 7 and Inconel 625, 600, Monel 400, that I have not tested but from what I can find maybe only Titanium has good corrosion resistance out of these.
All responses appreciated. Thanks in advance.