Engine coolants alloys

Test method for corrosion of cast aluminium alloys in engine coolants under heat-transfer conditions... 

Select the engine coolant or antirust with care to ensure adequate corrosion protection. Use only those products conforming to recognized standards such as ASTM D 3306 for engine coolant. Additionally, if your vehicle engine contains major cast aluminum components, be certain the engine coolant meets the heat rejection corrosion limits in ASTM specification D 3306 as determined by ASTM Test Method for Corrosion of Cast Aluminum Alloys in Engine Coolants Under Heat-Transfer Conditions (D 4340). 

Uses Corrosion inhibitor tor copper, high copper alloys for use in aq. systems, printed circuit boards, metalworking fluids, water treatment, air conditioning fluids, engine coolants Features Noncaustic nondusting nontlamm. 

Earlier static immersion tests by Noranda on ZA-8 alloy samples in Prestone II engine coolant demonstrated no susceptibility of the alloy to intergranular corrosion. In addition to agitation, differences between the two tests consisted of a higher test temperature and lower glycol/water ratio for the dynamic test. Both factors may have been responsible for the small amount of intergranular corrosion observed. 

After 32 days at 88°C in 33% Prestone II (a commercial engine coolant solution that contains silicate inhibitors), ZA-8 and Alloy 3, either as-cast or polished, showed no corrosion. Dynamic tests confirmed the suitability of ZA-8 at 118°C. ZA-27 displayed intergranular attack when tested as-cast but not when its surface was polished before testing. Possibly, the soft, zinc-rich phase had been smeared over the whole surface during polishing. 

An intensive study conducted for the Copper Development Association and reported by Beal [30] reported on two new soldered cup specimens that had been developed to evaluate blooming corrosion effects of solder and soldering parameters using ASTM D 1384 (Corrosion Tests for Engine Coolants in Glassware). Critical examination of the original test revealed wide variations in results in appearance and weight loss so that differences in solder alloy corrosion were difficult to interpret. 

Test Method for Corrosion of Cast Aluminum Alloys in Engine Coolants Under Heat-Rejecting Conditions Engine Coolant Information Report Engine Coolant Concentrate... 

L.H. Han, X.Y. Nie, H. Hu, Electrochemical behaviour of squeeze cast AJ62 magnesium alloy in salt solution and engine coolant . Mater. Technol. 24 (2009) 170-173. 

R.L. Chance, Electrochemical corrosion of an aluminium alloy in cavitating ethylene glycol solutions , in W.H. Ailor (ed). Engine Coolant Testing State of the Art, ASTM STP 705, American Society for Testing and Materials, Philadelphia (1980) pp. 270-283. 

G. Song, D.H. StJohn, Corrosion of magnesium alloys in commercial engine coolants . Materials and Corrosion, 56 (2005) 15-23. 

ASTM D4340-96, Standard test method for corrosion of CAST aluminium alloys in engine coolants under heat-rejecting conditions , A STM International (2007) V ol. 15.05. 

Z. Shi, P.K. Mallick, R.C. McCune, Characterization of film formation on magnesium alloys due to corrosion in engine coolants , SAE technical paper 2008-01-1155, SAE International, Detroit. 2008. 

M. Starostin, S. Tamir, New engine coolant for corrosion protection of magnesium alloys , Materials and Corrosion, 57 (2006) 345-349. 

RI,. Chance, Electrochemical Corrosion of an Alu-minum Alloy in Cavitating Ediylene Glycol Solutions, p r presented at the Intemational Sympo-sium on State of the Art Engine Coolant Testing, April 1979, (Atlanta, GA), ASTM... 

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