Corrosion Testing Standards for High- and Low-Boiling Engine Coolants on Metal Specimens
According to National Standard SH/T0085 (Method for Determining Corrosion of Engine Coolants) and relevant industry regulations, the testing standards and methods for evaluating the corrosiveness of high- and low-boiling engine coolants on metal test specimens are as follows:
I. Testing Standards and Parameters
Temperature Control
High-boiling coolant: 88 ± 2°C
Low-boiling coolant: 71 ± 2°C
Test duration: 336 ± 2 hours
Requirements for Metal Test Specimens
Materials: Pure copper, brass, 20# steel, cast iron, solder, cast aluminum
Maximum allowable mass change:
Pure copper/brass/steel/cast iron: ±10 mg
Solder/cast aluminum: ±30 mg (per GB29743-2013)
II. Testing Method (Glassware Method)
Sample Preparation
Use three 1000-mL tall-form beakers per sample
Each beaker contains 750 mL of test coolant and a test specimen bundle
Test Conditions
Airflow rate: 100 ± 10 mL/min
Heating method: Direct heating via an electric hot plate (no medium required)
Corrosion Evaluation
Immediately after testing, clean the test specimens
Remove loose corrosion products using a soft brush
Measure and calculate mass change
III. Key Influencing Factors
Coolant Composition
Ethylene/propylene glycol-based coolants require corrosion inhibitors (e.g., borates, organic acids)
Distilled water purity: ≤5 ppm
Environmental Control
Relative humidity: ≤85%
Recommended lab temperature: 15–30°C
The current SH/T0085 standard is compatible with ASTM D1384, and some advanced instruments integrate silent air compressors for automated testing.
SH0085 antifreeze corrosion instrument is according to the law of the People's Republic of China petroleum and chemical industry standard SH/T0085 the engine cooling fluid corrosion measurement the requirements of the design and manufacture, suitable for according to the SH/T0085 standard measurement method, the determination of high boiling point and low boiling point engine coolant and concentrate on the extent of the typical specimens of metal corrosion, SH0085 corrosion tester upgraded instruments bring silent air compressor, no need to manually equipped with air.
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