6-4
Chapter 6 COOLANT
Circulation metal-
lic causticity
(98±2°C
[208.4±35.6°F],
1000 Hr,
30 vol %
(E.G)
50 vol %
(P.G)
Metal specimen
Mass
change
Aluminum, Cast
iron, Steel, Brass,
Solder, Copper
±0.30 mg/cm
2
Appearance of the specimen
after testing
No visible signs of corrosion on the surface
excluding the area contacting to spacer.
However, discoloration is acceptable.
Properties of
liquid after the
test
pH 7.0
to
9.0
pH change
±1.0
Pre-alkalinity change
±15 %
Precipitation
1.0 vol % or less
Appearance of liquid
No remarkable discoloration, separation
and gel generation.
Density
of ion
Fe, Cu, Al, Zn, Pb,
NH
4+
10 ppm or less
Circulation metal-
lic causticity
(88±3°C
[190.4±37.4°F],
1000±2 Hr,
30 vol %
(E.G)
Metal specimen
Mass
change
Aluminum ±0.60
mg/cm
2
Cast iron
±0.30 mg/cm
2
Steel ±0.30
mg/cm
2
Brass ±0.30
mg/cm
2
Solder ±0.60
mg/cm
2
Copper ±0.30
mg/cm
2
Appearance of the specimen
after testing
No visible signs of corrosion on the surface
excluding the area contacting to spacer.
However, discoloration is acceptable.
Properties of
liquid after the
test
pH 6.5
to
11.0
pH change
Maximum ±1.0
Appearance of liquid
No remarkable discoloration, separation
and gel generation.
Condition of
parts
Pump seal
Free from any malfunction, liquid leak and
abnormal noise during operation.
Inside of pump case and blade Free from remarkable corrosion
Rubber adapt-
ability
(30 vol %,
115°C [239°F],
360 Hr)
Silicon
Tensile strength change
-60 to 0 %
Elongation change
-40 to +20 %
Volume change
0 to +40 %
Hardness change
-20 to +10 %
Acrylonitrile
butadiene rub-
ber
Tensile strength change
0 to +10 %
Elongation change
-15 to +15 %
Volume change
0 to +40 %
Hardness change
-10 to 0 %
Ethylene pro-
pylene diene
monomer
Tensile strength change
0 to +10 %
Elongation change
-30 to 0 %
Volume change
0 to +10 %
Hardness change
-10 to 0 %
Table 6-2 LLC Specification
Property
Standard
