MONEL ALLOY RESISTANT TO STRESS CORROSION CRACK IN HYDROFLUORIC ACID.

摘要

Monel alloy, in particular Monel 400, which is stress corrosion crack resistant in hydrofluoric acid or where the acid formation is a possibility through chemical reactions with fluoride salts and its process for manufacture. The stress corrosion crack protected Monel-400 is selected from atleast one of (i) Monel-400 cold worked atleast 60% (ii) grain refined Monel-400 and (iii) Monel-400 galvanic coupled with a protective metal which is anodic to Monel-400.The Monel alloy is directed to wide variety of industrial applications even in environments where the alloy comes in direct contact with hydrofluoric acid. It would thus be possible to use of articles / components made of Monel 400 in conditions wherein the said articles would come in direct contact with hydrofluoric acid.