6-3
Chapter 6 COOLANT
LLC Quality Requirements
LLC shall be tested according to JIS K2234, Section 7 "Test method", and satisfy the requirements. General mat-
ters and specimen sampling method shall comply with JIS K2234.
Table 6-2 LLC Quality Requirements
Property Standard
Appearance No precipitation
Density
Minimum 1.112 g/cm
3
[69.4199 lb/ft
3
] (20/20 °C) [68/68 °F]
(Stock solution)
Water content Maximum 5.0 weight % (Stock solution)
Frozen temperature
30 vol % Maximum -14.5°C [5.9°F]
50 vol % Maximum -34.0°C [-29.2°F]
Boiling temperature 155°C [311°F] or higher (Stock solution)
pH 7.0 to 11.0 (30 vol %)
Bubbling character
(ASTM D3306-01)
30 vol % 4.0 ml or less
33
1/3 vol %
150 ml [0.032 gal] or less, disappearance of
bubble within 5 seconds.
Hard water adaptability 1.0 or less (50 vol %)
Metallic causticity
(88 ± 2°C
[190 ± 3.60°F],
336 ± 2 Hr,
30 vol % (E.G),
50 vol % (P.G)
Metal speci-
men
Mass
change
Aluminum ±0.30 mg/cm
2
Cast iron ±0.15 mg/cm
2
Steel ±0.15 mg/cm
2
Brass ±0.15 mg/cm
2
Solder ±0.30 mg/cm
2
Copper ±0.15 mg/cm
2
Appearance of the specimen
after testing
No visible signs of corrosion on the surface
excluding the area contacted to the spacer.
However, discoloration is acceptable.
Bubbling during the test No bubbles overflowing
Properties of
liquid after
testing
pH 6.5 to 11.0
pH change ±1.0
Precipitation 0.5 vol % or less
Appearance of liquid
No remarkable discoloration, separation
and gel generation.
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