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Aluminum-Coated Steels for Elevated Temperature Applications
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English
Abstract
The standard tests for exhaust system materials are reviewed and new tests involving cyclic oxidation and salt exposure plus oxidation are suggested. The importance of edge oxidation in the interpretation of oxidation weight gain measurement for coated steels is demonstrated. For aluminum-coated steel Type 1, 80% of the weight gain was due to edge oxidation for the test conditions used. Depth profiling an oxidized aluminum-coated steel Type 1 shows why this product is an excellent material for elevated temperature applications. The protective oxide on the aluminum-coated product remains almost pure aluminum oxide even after the coating has alloyed with the base steel. Improved aluminum-coated steels are shown to be possible by changing the chemical composition of the steel substrate.
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Citation
Gibson, A., Kilbane, F., and Dunbar, F., "Aluminum-Coated Steels for Elevated Temperature Applications," SAE Technical Paper 810037, 1981, https://doi.org/10.4271/810037.Also In
References
- Buhler H. E. et al. “The Metallography of Steels With Surface Treatment,” “Prakische Metallographic,” 14 1977
- “Standard Recommended Practice for Simple Static Oxidation Testing,” 1978 Annual Book of ASTM Standards,” Philadelphia, PA ASTM 1978
- Kilbane F. M. Robinson D. “Contribution of the Oxidation of Uncoated Edges to the Weight Gain of Metallic Coated Steels Heated in the 600° - 800°C Range,” ASTM Symposium on Industrial Methods for Testing in High-Temperature Environments Phoenix, Arizona May 1981
- Kim Y.-W. Nickola R. A. “A Heat Resistant Aluminized Steel for High Temperature Applications,” SAE Paper 800316 February 1980
- Flinchum C. Dunbar F. C. Arnold J. L. “Method of Coating Low Alloy Steels,” U. S. Patent No. 3,925,579 December 9 1975