EROSION CORROSION BY SOLID PARTICLES IN SUSPENSION IN AN AQUEOUS CORROSIVE MEDIA JeanPierre Audouard

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EROSION CORROSIONBY SOLID PARTICLESIN
SUSPENSION IN AN AQUEOUS CORROSIVE
MEDIAJean-Pierre AudouardChristophe Dernoncourt
to be completed ...
Revision 29 July 1999
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PICTURE OF EROSION-CORROSION IN PHOSPHORIC ACID
WITH SOLID PARTICLES
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MECHANICAL PROPERTIES
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EROSION-CORROSION by SOLID PARTICLES
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EROSION-CORROSIONSolid particles 50 g/l SiC 99
microns, Impact Angle 90d, Velocity 5.5 m/s,
temperature 25C/77F
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EFFECT OF EROSION BY SOLID PARTICLES200 ppm Cl-
, 20C. Solid particles 300 microns, 100 g/l
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EFFECT OF EROSION BY SOLID PARTICLES in 30 P205
synthetic phosphoric acid at 80C/176F
Corrosion rate (mm/yr)
Corrosion
Erosion-Corrosion
1,5
1,0
0,5
0
N08904
32550/S32520
S31266
UR B6
UR 52N
UR B66
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FIELD TESTS IN RHONE-POULENC PLANTSCorrosion-Abra
sion of Central Agitators
Di-hydrate process ( 80C/176F)
Corrosion rate (g)
Corrosion rate (mm/year)
50
1
Samples fastened to Surface Agitators
40
- Dn1 reactor
- Samples attached to surface agitators
30
- linear speed lt 5 m/s
0,5
20
- test duration 9 months
10
0
0
08028 URB28
08926 URB26
URB6 08904
32520 UR 52N
32520
N 06625
08926 URB26


UR 52N
UR 625
In GREECE
In BELGIUM
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UR 35N - 2304 DUPLEX IMPROVED ABRASION CORROSION
RESISTANCE
1.0
H2O/Na2 SO4 Na Cl Si O2 PH 3 - V 3
m/sec 9 ft/sec
80 savings
Weight loss
0.4
0.2
C.Mn steel
2304UR 35N
304L

• UR 35N - Duplex 2304 has improved corrosion
  resistance properties when considering
  water/aqueous solutions containing chloride ions
  and/or abrasive particles (Si O2, sand...)

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GENERAL BEHAVIOUR OF MATERIALS Abrasion vs
Corrosion
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Co - Cr - Ni
W, Mo
7
etc
Aciers outils
Fontes au
rapides
chrome
Moins cher que Co
6
plus performant
que les inox
8000
5
Résistance croissante
à l abrasion

UR 52N
4
500
(Mn N)
PH
UR B6
HB
Duplex
3
17/7
400
13/4
instables
HB
2
13/4 Mo
4003
16/5 Mo
3Cr 12
1
Aciers
304
316
durs
Sec
Humide
Corrosion croissante
1
2
3
4
5
6
- Tôles plaquées
Produits économiques
- Revêtements et plaques anti-usure
- Mise en uvre simple