NEW BRUNSWICK SCIENTIFIC BioFlo 415, Manual To Operations

Page: 144 / 164

132
BioFlo 415
y
M1360-0050 User’s Guide
2
2
4
4
A
A
P
P
P
P
E
E
N
N
D
D
I
I
X
X
D
D
:
:
C
C
O
O
R
R
R
R
O
O
S
S
I
I
O
O
N
N
R
R
E
E
S
S
I
I
S
S
T
T
A
A
N
N
C
C
E
E
T
T
A
A
B
B
L
L
E
E
S
S
O Corrosion Rate less than 0.002” per year
P Corrosion Rate less than 0.020” per year
Corrosion Rate from 0.020” to 0.050” per year
Corrosion Rate greater than 0.050” per year
This table shows the resistance of Type 316
350 662 20 40 60 80 100
stainless steel to the more common 300 - - -
chemicals. Many factors influence the 250 482
resistance of materials to various solutions 212 - - -
Factors which must be given consideration 175 347
for service in corrosive environments are: 150 - - -
temperature, concentration, aeration, influ- 125 257
ence of inhibiting or accelerating contamin- 100 212
ents, influence of recirculation, solids in 75 167
suspension, velocity; frequency of use, and 50 - - -
equipment design. The corrosion data is 25 77 20 40 60 80 100
reprinted from Corrosion Data Survey, 1967 C F Percent Concentration in Water
and 1974 Editions, published by the
National Association of Corrosion Engineers
The influence of contaminants is probably the most important from a commercial standpoint. Corrosive solutions are seldom
found that will be free to all contaminates. However, the majority of these contaminants have no influence on corrosion, but
the ones that do generally affect the conditions greatly.
When reviewing these corrosion tables, it is good to keep the following in mind:
Stainless Type 316 is resistant to chemicals.
FOOTNOTES
Footnotes for Corrosives: Footnotes for Data Squares:
1 Poison 20 Agitated
2 Toxic 21 7 pH
3 Explosive 22 < 7 pH
4 Flammable 23 > 7 pH
5 Ingestion poison 24 No HCI, H
2
SO
4
, HaC1
6 Inhalant poison 34 No stress
7 Attacks skin 36 300 psi
8 Irritant 37 Stress relieved
9 Vapor harmful 45 < 60 psi
10 Ignites Organics 51 > 2.25% Mo
11 Fuming liquid 72 over 400ºC
12 Hygroscopic 79 300 psi
13 Liberates HCL in water 80 No SO
3
14 Narcotic
15 Volatile
16
Hazardous under pressure
17 Ignites combustibles
24 Exothermic with water