In order to select suitable corrosion-resistant metallic materials for inner wall of the chimney

the composition of condensed liquid from flue gas in the chimney after desulphuization in thermal power plant has been analysed.Selecting primarily 304

316L

317L

N6

TA1

TA2

double-phase 2205

409

No.20

C-276

C-22

C-2000 totalled twelve materials and being immersed in condensed liquid of 75 ℃±1 ℃ to carry out soaking test for 168 h.Based on the results of test

seven materials

the annual corosion rate being comparatively lower

i.e.TA1

TA2

317L

double-phase 2205

C-22

C-276

and C-2000

have been picked out

and corrosion-accelerating test being further carried out by using acid solutions with concentration of 5%

2.5%

1%

0.5%

and 0.1% respectively(aditionally adding Cl of 1000 mg/L and F of 100 mg/L).Results show that hte 317L

TA1

and TA2 can be used as corrosion-resistant inner lining of chimney due to their good corrosion-resistant behavior.