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Three samples were provided for testing. The flat
surfaces were then ground to a 120-grit finish and the welds were glass bead
blasted to remove the scale. The test ran for 24 hours. All other test
procedures were in accordance with ASTM G28: “Standard Test Methods for
Detecting Susceptibility to Intergranular Corrosion in Wrought, Nickel-Rich,
Chromium-Bearing Alloys, Method A, Ferric Sulfate-Sulfuric Acid Test”. |
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After testing, the specimens were cleaned,
re-weighed, and examined. The mass loss was used to determine the corrosion
rate (see Table 1 below) for each of the specimens. Corrosion rates
generally accepted for this material in this test are less than 0.04 inches
per month. The corrosion rates for all three tested samples were below this
criteria. |
