Question

36. Indicate what is the effect of 1) increasing chlorides, 2) increasing Cr in the alloy. Do this by drawing arrows and clearly labeling each of these two effects. Current Density 37. Describe the limitations of using a corrosion resistant aluminum alloy in marine service 8. Calculate the PREN for an alloy with the following composition Cr-27.0, Ni-2.0, Mo 4.1,Mn-0.4 N-0.035. Would it be safe to use this alloy in seawater? 39. In certain stagnant situations, where oxygen concentration should be near zero, corrosion rates for iron and steel near one mm/y (40 mpy) have been reported. Briefly describe what factor/variable influences corrosion under these conditions.

Answer 1

Lmta) Eo in 8e) Akos o dama h increnses PPEN28.88

Reason.. Crevice cano Siơ พิเ eleclfochenical Cells. less Ox Anode Mv