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Corrosion Mechanism of High Lead Solder and Correlation to Dissolved Oxygen
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Abstract
High lead solder coupons are frequently tested in ASTM D 1384-87 and D 2570-91 tests to determine the corrosion protection provided by engine coolants. In contrast to 70/30 solder, high lead solder is often observed to show relatively high corrosion rates in D 1384-87 testing. Surprisingly, the high lead solder corrosion rates tend to be lower in the D 2570-91 test, despite the longer duration of this test.
The basis of this effect has been investigated in different coolant formulations and in both ethylene glycol and propylene glycol. The corrosion of high lead solder was found to be directly related to the presence of oxygen in the D 1384-87 test. Replacement of the air purge with a nitrogen purge significantly reduced the corrosion rate of high lead solder in inhibited coolants. These results are interpreted in terms of the solder composition.
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Citation
Miller, D., Bade, R., and Orth, J., "Corrosion Mechanism of High Lead Solder and Correlation to Dissolved Oxygen," SAE Technical Paper 940497, 1994, https://doi.org/10.4271/940497.Also In
References
- “Standard Test Method for Corrosion Test for Engine Coolants in Glassware” 1993 Annual Book of ASTM Standards 15.05 ASTM Philadelphia 33 “Standard Test Method for Simulated Service Corrosion Testing of Engine Coolants” 1993 Annual Book of ASTM Standards 15.05 ASTM Philadelphia 61
- Beal R. E. “Development of New Solder Alloys for Automotive Application” SAE paper # 720011
- Mitchell W. A. “Statistical Treatment of Laboratory Data for ASTM D 1384-70 Using Soft Solder” Engine Coolant Testing: State of the Art Ailor W.H. ASTM Philadelphia 1980 220
- Park K. H. “Solder Bloom Corrosion Analysis Based on Field Survey Data, Potential Causes, and Resolution” Engine Coolant Testing: Second Symnosium Beal R. E. ASTM Philadelphia 1986 123
- Davies D.E. Prigmore R. M. “The Corrosion of Low Tin Solders in Automobile Coolants of Inhibited Ethanediol Solutions - A Practical Viewpoint” Proceedings of the 6th European Symposium on Corrosion Inhibitors (6SEIC) Ann. Univ. Ferrara, N.S. 8 1985 1255
- Arnold J. R. Murphy S. “Corrosion of Lead-Tin and Lead-Free Solders in Engine Coolants” Engine Coolants, Cooling System Materials, and Components, SAE SP-906 paper 930586 SAE Warrendale, PA 105
- Bard A.J. Faulkner L.R. Electrochemical Methods: Fundamentals and Amplications John Wiley & Sons New York 1980 700
- Huang C. Liu X. Electrochimica Acta 35 1 173 1990
- Adanuvor P.K. White R.E. J. Electrochem. Soc. 135 10 2509 1988