By using computer-based microscope

X-ray diffraction

electron microscopy with energy dispersive spectroscopy and so on

effects of sensitization temperature and time on number

structure

distribution

morphology and chemical composition of precipitates in Incoloy028 alloy samples prepared under different conditions were investigated.Meanwhile

using 10% the oxalic acid sample

influence of precipitates on corrosion resistance of the Incoloy028 alloy was analyzed.The results reveal that a higher secondary precipitates from Incoloy028 alloy with sensitization treatment at 800

1

000 ℃ can be observed while a less precipitates can be observed at about 700 ℃.At the same sensitizing temperature

with the extension of sensitization time

precipitates in the alloy can be increased gradually

in which Cr

Mo element content is increased

while Fe

Ni element is decreased

which is responsible for the decrease of corrosion resistance of Incoloy028 alloy.