4

1 h

>500b

339b

17b

>500b

4C

3 h

>500b

313b

85b

>500b

4C

aTo convert to mm/y multiply by 0.0254. bAlloys C-276, C-22, C-2000, and 686. Heavy pitting attack with grains falling due to deep intergranular attack. cAlloy 59. No pitting attack.

aTo convert to mm/y multiply by 0.0254. bAlloys C-276, C-22, C-2000, and 686. Heavy pitting attack with grains falling due to deep intergranular attack. cAlloy 59. No pitting attack.

FIGURE 7.2 Influence of thermal stability on corrosion of alloy 22 and alloy 59 after aging at 1600°F and tested in ASTM G-28B test solution (deep intergranular attack on alloy C22. No attack on alloy 59).

Alloy 22 Alloy 59

FIGURE 7.2 Influence of thermal stability on corrosion of alloy 22 and alloy 59 after aging at 1600°F and tested in ASTM G-28B test solution (deep intergranular attack on alloy C22. No attack on alloy 59).

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