What amine chlorde limit do refiners consider necessary to avoid stress corrosion cracking of stainless steels? We normally hold to a limit of 500ppm, but have one unit with 700-800ppm chloride ion which runs at very high acid gas loadings and so depends on a good corrosion inhibitor. The inhibitor contatins some chlorides, which contribute to the problem. Switching to a less effective inhibitor to reduce chlorides will likely increase general metal loss. What is the real limit?
