Physicochemical property test

Test Background

The physical and chemical properties of the coolant directly determine its heat transfer ability, flow characteristics, and compatibility with the system. Low-quality coolant may cause problems such as corrosion, blockage, and heat transfer attenuation.

Test Introduction

The physicochemical property test covers core indicators such as appearance and cleanliness, density and viscosity, freezing point and boiling point, pH value and corrosivity, electrical conductivity, and dielectric strength, comprehensively evaluating the basic performance of the coolant.

Testing Objectives

Verify that the appearance and cleanliness of the coolant meet the requirements

Measure the density and viscosity at different temperatures

Ensure that the freezing point/boiling point meets the requirements of the application environment

Detect safety indicators such as pH value, electrical conductivity, and dielectric strength

Test Standards

YD/T 3982-2021 Technical requirements and test methods for cooling liquids in data center liquid cooling systems

GB/T 29743.2-2025 Motor vehicle coolants

ASTM D1120 Boiling point test

ASTM D1177 Freezing point test

Applicable Products/Fields

Suitable for various liquid cooling working fluids such as water-based coolants, ethylene glycol solutions, propylene glycol solutions, and electronic fluorinated liquids.

Test Content

Appearance and odor: Colorless and transparent, no abnormal odor

Density test: Density measurement at 20°C/40°C/60°C

Viscosity test: Kinematic viscosity measurement (-40°C~60°C)

Freezing point/boiling point test: Freezing point and boiling temperature

pH value and conductivity: Acidity and alkalinity and ion concentration

Dielectric strength: Insulation performance test (fluorinated liquid)

Project Advantages

Full set of physical and chemical performance testing capabilities

High-precision viscometer (0.1 cSt accuracy)

Provides comprehensive performance data sheets and compliance evaluations

Laboratory Configuration

Density pycnometer/digital densitometer

Glass capillary viscometer/rotary viscometer

Freezing point meter/boiling point meter

pH meter/conductivity meter

Dielectric strength tester

FAQ
Q: What is the conductivity requirement for water-based coolants?
A: Usually, it is required to be ≤5 µS/cm. Pure water can reach below 0.1 µS/cm. Corrosion inhibitors need to be added to the ethylene glycol solution, but the electrical conductivity should still be as low as possible.