The ASTM-D7935 is the Standard Test Method for Corrosion Test for Non-Aqueous Engine Coolants in Glassware

This test method covers a simple beaker-type procedure for evaluating the effects of non-aqueous engine coolants on metal specimens under controlled laboratory conditions

Compared to ASTM D1384:

ASTM D1384                       ASTM D7935

Static glassware                 Heated aluminum surface

14 days                                7 days

Multiple metals                  Aluminum-focused

Weight loss only                Corrosion + heat transfer + deposits

D7935 better reflects modern aluminum engine conditions.

It may be referenced in:

• OEM coolant approvals
• Hybrid & high-output engine specifications
•  Advanced OAT and HOAT coolant validations

Especially relevant for:

• Aluminum cylinder heads
• Turbocharged engines
• EV thermal management systems

Limitations of the ASTM-D7935  are:

• More complex and expensive than D1384
• Requires specialized apparatus
• Not a full engine simulation

Main Features:

• Complete apparatus for ASTM D1384, ASTM D7935, ASTM D8040, ASTM D8485 and SH/T0085 tests
• All accessories can be supplied by Tamson
• Robust bath
• All wetted parts are made from stainless steel
• Bath drain
• Bath is equipped with cooling coil for counter-cooling
• Six positions
• Six flowmeters included
• Very robust glassware with clamp to ensure proper sealing
• Level protection device
• No rubber stopper is needed, as rubber stoppers can crack over time

The Tamson ASTM D7935 apparatus is available in the following voltages/frequencies:

• Tamson ASTM D7935 230V/50-60Hz (P/N: 00T2040)
• Tamson ASTM D7935 115V/60Hz (P/N: 00T2041)

See tab "More information" for the specificationsheet and manual