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RWS / PWS Kp - Ka - Kh - Ke
Table key
+ Good resistance under normal conditions
0 Corrosion problems may occur especially
when more factors are valued 0
- Use is not recommended
WATER CONTENT
-
Alkalinity (HCO
)
3
[1]
2-
Sulphate
(SO
)
4
-
2-
HCO
/ SO
3
4
[2]
Electrical conductivity
(Refer to Table 3 for oxygen content guidelines)
[3]
pH
+
Ammonium (NH
)
4
-
Chlorides (Cl
)
(Refer to Table2 for temperature- dependent values
Free chlorine (Cl
)
2
Hydrogen sulfide (H
S)
2
Free (aggressive) carbon dioxide (CO
[5]
Total hardness
(Refer to ''Scaling Document'' for scaling aspect of
hardness effect)
[1]
-
Nitrate
(NO
)
3
[6]
Iron
(Fe)
Aluminium (Al)
[6]
Manganese
(Mn)
CHLORIDE CONTENT
= 10 ppm
= 25 ppm
= 50 ppm
= 80 ppm
= 200 ppm
= 300 ppm
=700 ppm
=1000 ppm
> 1000 ppm
MTEC.RWS-PWS.FR-1 Manuel d' instructions serie RWS-PWS Kp-Ka-Kh-Ke - Français
CONCENTRATION
(mg/l or ppm)
< 70
70-300
> 300
< 70
70-300
> 300
> 1.0
< 1.0
< 6.0
6.0-7.5
7.5-9.0
9.0-10
>10.0
< 2
2-20
>20
<100
100-200
200-300
)
300-700
>700
< 1
1-5
> 5
< 0.05
>0.05
< 5
)
5-20
2
> 20
4.0 - 11 °dH
70 - 200 mg/l CaCO3
< 100
> 100
< 0.2
> 0.2
< 0.2
> 0.2
< 0.1
> 0.1
MAXIMUM TEMPERATURE
20°C
30°C
60°C
SS 304
SS 304
SS 304
SS 304
SS 304
SS 304
SS 304
SS 304
SS 304
SS 316
SS 316
SS 316
SS 316
SS 316
SS 316
SS 316
SS 316
SS 316
SS 316
SS 316
Ti
SS 316
Ti
Ti
Ti
Ti
Ti
Important Note: The following paratmeters can also influence the corrosion
resistence
Temperature: The data in the table are based water temperature of 20°C
unless otherwise is stated.
Presence of oxidants in the environment: guidelines regarding the oxygen
content are shown in Table 3.
Product form, heat treatment and presence of intermetallic phases:
The data in the table is based on untreated raw material.
Plate Material
TIME LIMITS
AISI 304 AISI 316 COPPER NICKEL
Analyze before
+
Within 24 h
+
+
+
No limit
+
+
+
No limit
+
+
No limit
+
+
0
+
Within 24 h
+
+
+
+
Within 24 h
+
+
+
0
No limit
+
Within 5 h
+
No limit
+
+
No limit
+
+
No limit
+
+
No limit
+
+
No limit
+
+
No limit
+
+
No limit
+
80°C
120°C
130°C
SS 304
SS 304
SS 316
SS 304
SS 316
SS 316
SS 316
SS 316
Ti
SS 316
SS 316
Ti
SS 316
Ti
Ti
Ti
Ti
Ti
Ti
-
-
Ti
-
-
Ti
-
-
28
Brazing Material
+
0
+
+
+
+
+
0/+
+
+
+
+
+
0/-
+
+
-
+
+
+
+
+
0/-
+
+
0
+
+
+
+
+
0
+
0
0
+
+
0
+
+
+
+
[4]
+
0/+
+
+
0
+
+
+
+
+
0
+
+
-
+
+
+
+
+
+
+
-
+
+
+
-
0/+
0/+
+
-
-
0
+
+
+
+
-
-
0
+
-
-
0/-
+
+
+
+
+
0/-
+
+
+
+
+
0
+
+
-
+
+
+
+
+
+
+
+
0
+
+
+
+
+
0
+
+
+
+
+
0
+
+
+
+
+
0
+
-
STAINLESS
STEEL
+
+
+
+
+
+
+
+
+
+
+
0
+
+
+
+
+
+
+
+
+
+
-
-
+
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
Rev. 4 10-2023
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