Chapter 6
COOLANT
6-4
Circulation metalic
causticity (98 ±
2°C[205 to 212°F]
、
1000 Hr
、
30 vol %
(E.G), 50 vol %
(P.G)
Test piece
Mass change
Aluminum, Cast
iron, Steel, Brass,
Solder, Copper
±0.30 mg/cm
2
External of test piece after the
examination
Not corrosion on surface excluding
between test piece and spacer. Discolora-
tion is OK.
Properties of
liquid after the
examination
pH
7.0 to 9.0
pH change
±1.0
Pre-alkalinity change
±15
％
Precipitation
Maximum 1.0 vol %
External of liquid
Not remarkable discoloration, separation
and gel.
Density of
ion
Fe, Cu, Al, Zn, Pb,
NH
4
+
Maximum 10 ppm
Circulation metalic
causticity (88 ±
3°C[185 to 196°F]
、
1000 ± 2 Hr
、
30
vol % (E.G)
Test piece
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
External of test piece after the
examination
Not corrosion on surface excluding
between test piece and spacer. Discolora-
tion is OK.
Properties of
liquid after the
examination
pH
6.5 to 11.0
pH change
Maximum ±1.0
External of liquid
Not remarkable discoloration, separation
and gel.
Condition of
parts
Pump seal
Not trouble while the examination
Inside of pump case and blade
Not remarkable corrosion
Table 6-2
LLC specification
Property
Limit
