Corrosion Resistance Of Copper And Stainless Steel Of Plates Exchanger - Lennox ECOLEAN EAC 0091 S Installation, Operating And Maintenance
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3.- COMMISSIONING AND OPERATION
3.3.- CORROSION RESISTANCE OF COPPER AND STAINLESS STEEL OF PLATES EXCHANGER
(WATER EXCHANGER)
GUIDE TO MEASURE A ANALYSIS OF THE WATER IN THE CIRCUIT.
The resistance guide below is an attempt of give a picture of the corrosion resistance of the stainless steel of the
type AISI 316 and pure copper in the water, to a number of important chemical factors. The actual corrosion is however
a very complex process influenced by many factors in combination. This table is therefore a considerable simplification
and should not be overvalued.
Explanations:
+ Good resistance under normal conditions
0 Corrosion problems can occur especially when the factors are valued as 0
- Use is not recommended
WATER CONTAINING
Alcanity (HCNO
Sulfate (SO
2-
)
4
2-
HCO
/ SO
3
4
Electrical conductivity
pH
Ammonium (NH
Chloroides(Cl - )
Free chlorine (Cl
Hydrogen sulfide (H
Free (aggressive) Carbon Dioxide (CO
Total hardness (ºdH)
Nitrate (NO
)
3
Iron (Fe)
Aluminum (Al)
Manganese (Mn)
)
3
)
3
)
2
S)
2
CONCENTRATION
mg/l or ppm
<70
70-300
>300
<70
70-300
>300
>1.0
<1.0
<10 µS/cm
10-500 µS/cm
>500 µS/cm
<6.0
6.0-7.5
7.5-9.0
>9.0
<2
2-20
>20
<50
>50
<1
1-5
>5
<0.05
>0.05
)
<5
2
5-20
>20
4.0-8.5
<100
>100
<0.2
>0.2
<0.2
>0.2
<0.1
>0.1
35
AISI 316
COPPER
+
0
+
+
+
0
+
+
+
-
0
-
+
+
+
-
+
0
+
+
+
0
0
0
0/+
0
+
+
+
0
+
+
+
0
+
-
+
+
0
0
+
+
+
0
0/+
-
+
+
+
-
+
+
+
0
+
-
+
+
+
+
+
0
+
+
+
0
+
+
+
0
+
+
+
0
- Quick Links:
- Technical Data
- Failure Diagnosis
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