Can the nickel base alloys handle chlorine?
A. Yes, when it is dry chlorine. In fact, alloys 200/201 and alloys 600 offer the best resistance to high temperature chlorine atmospheres. However, when environment involves wet chlorine and chlorine condensates, nickel base can be aggressively attacked. Those alloys with the highest molybdenum contents e.g. Alloy 625 and alloy C276 provide limited service in bleach plant washer service. Hastelloy alloy B, with 29% molybdenum, offers the best of the nickel-base alloys for handling wet chlorine environments. General rule of thumb: Titanium for wet chlorine service; Nickel base alloys for dry chlorine service.
