Originally Posted by Jake_J
Originally Posted by Wheel
I think the tests that should be indicators of coolant corrosion in different metals are ASTM D1384 and D2570.
I did a fair bit of digging looking at coolant a while back, the test results for these tests weren't readily available from too many manufacturers.
My understanding is that ASTM D3306 and D6210 include those tests, but are just a 'meets the spec' indicator. The results of D1384 and D2570 would show underlying differences.
Valvoline publishes all corrosion results for all the Zerex coolants for the ASTM D1384 and D2570 tests in the product information sheets. None of the coolants have any problems passing for solder or copper corrosion, their Dexcool passes with flying colours just like the old school IAT green. The Zerex G40 has an raised corrosion score for the D2570 test but it's still less than half of the min spec cutoff.
Zerex G40 PI Sheet
Zerex Dexcool PI Sheet
Zerex Original Green PI Sheet
Looking at the weight loss in solder between the G40 and original green, the G40 has 3x the weight loss (24 vs 3 Mg). Their dexcool clocks in at 5 Mg.
It is within the D2570 spec, (60 Mg lost), but it 24 looks significant to me, relative to 3.
Is this 2-EHA at work and how significant is this ?