MaTestLab > ASTM Methods > Glass > ASTM D1881 Standard Test Method for Foaming Tendencies of Engine Coolants in Glassware
Last updated 16th March 2026
ASTM D1881 Standard Test Method for Foaming Tendencies of Engine Coolants in Glassware
ASTM D1881 is a standard method that determines the foaming characteristics of engine coolants in monitored settings by a glassware configuration. The test is used to determine the amount of foam produced and the time taken for the foam to dissipate, which gives indications about the stability of a coolant and how it can be used in internal combustion engines. This technique allows finding the formulations that may lead to excessive operation problems, like coolant overflow, air entrapment, or ineffective heat transfer in an engine system, by exposing the coolant to air agitation and heat.
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ASTM D1881 Introduction
ASTM D1881 is a standardized and repeatable technique for determining the foaming capacity and stability of engine coolants during simulated service by monitoring the foaming of engine coolants. Automobile makers find the method especially helpful to quality control laboratories that require the stability and performance of antifreeze and coolant mixtures, as well as to coolant formulators. The test assists in making sure that it is compatible with system material and that it has the same performance in different operating temperatures.
Get Certified ASTM D1881 for Reliable Engine Coolants in Glassware
ASTM D1881 certification is given to ensure that coolants in glassware satisfy specified mechanical and dimensional standards. Certified products enhance the strength and integrity of the glassware and the predictable performance of structural engineering and building use.
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ASTM D1881 Test Method
Sample Volume
Each determination consists of 200 mL of engine coolant being added to the test cylinder.
Temperature Conditions
Tests are performed at two standard temperatures, 24 ± 1°C (75°F) and 88 ± 1°C (190°F)
Aeration Procedure
Bubbling air is added at a regulated rate in the sample over a period of 5 minutes to produce foam.
Scope of ASTM D1881
Determines Foam generation and collapse of engine coolants.
Coverage to ethylene glycol, propylene glycol, and ready-to-use coolants.
Teams’ anti-foaming agents and the stability of the formulation.
Promotes quality assurance, man-made, and research on coolant systems.
ASTM D1881 Equipment and Sample Preparation
Specimen Details
Prepared engine coolants, such as ethylene glycol, propylene glycol, and ready-to-use combinations with inhibitors, are taken as test specimens.
Specimen Preparation
The preparation of the samples is by mixing up the coolant concentrate with deionized water in the proportion recommended by the manufacturer (usually 50/50 volume).
Specimen Dimensions
An estimated 200 mL of coolant is assigned in a glass cylinder with a 1000 mL capacity, with enough headspace to allow the formation and measurement of foam.
Applications of ASTM D1881
Testing of automotive and heavy-duty engine coolant.
Research and development of better coolant formulations to have greater stability.
Anti-foaming agents quality control.
Compatibility of new engine materials through performance evaluation.
ASTM D1881 Common Challenges and Troubleshooting
Bubbling at a non-uniform rate, dirty glassware, or unregulated temperature are some of the sources of unreliable results. Glassware must be thoroughly cleaned, and filtered dry air should be used by the analysts. Repeatable and accurate measurements can be achieved by ensuring that the conditions of the tests remain constant.
ASTM D1881 Aggregate Testing, Process, and Data Collection
The analyst introduces coolant in a glass cylinder, foams at a regulated rate, and observes foam generation. Measures of Foam volume and collapse time are taken and recorded. Repeat testing enables the determination of the average foam properties, and this is certain to give a consistent assessment of coolant stability.
ASTM D1881 Results and Interpretation
The amounts of foam and liquid that remain during a specific period of settling are recorded by the analyst. Stable coolants have low foam and fast collapse. Repeated tests are reliable and provide possibilities for optimizing formulations and additives.
ASTM D1881 Problem and Solution
Problem: Due to inappropriate aeration, contaminated glassware, or lack of temperature control, inaccurate foaming can be achieved.
Solution: Clean and dry glassware, good air flow, and temperatures are to be ensured by the analysts when doing the testing.
Factors to Consider for ASTM D1881
Speed
The foaming test is fast, but sample preparation and stabilizing the temperature can prolong the test.
Expert
The high-temperature samples and use of aeration equipment demand the services of a trained technician to work in a safe environment.
Cost
The cost of the tests is mediocre and varies with the glassware, aeration systems, and temperature control facilities.
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Please contact us for a detailed quote for your astm d1881 testing needs. Cost incurred to carry out different astm d1881 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm d1881?
The required number of samples or specimens should comply with the procedure given in the astm d1881 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
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The turnaround time for astm d1881 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
Where can I get the astm d1881 tested?
You can share your astm d1881 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm d1881 test to various testing techniques.
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