1.1.1 ,Method A, Ferric Sulfate-Sulfuric Acid Test (Sections 3 –, 10, inclusive)—,This test method describes the procedure for conducting the boiling ferric sulfate—,50 ,% sulfuric acid test which measures the susceptibility of certain nickel-rich, chromium-bearing alloys to intergranular corrosion (see Terminology G15), which may be encountered in certain service environments. The uniform corrosion rate obtained by this test method, which is a function of minor variations in alloy composition, may easily mask the intergranular corrosion components of the overall corrosion rate on alloys N10276, N06022, N06059, and N06455.