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Crevice Corrosion of Aluminium and It’s Prevention in Automobile Coolant Circuit
Technical Paper
2017-26-0170
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
This paper deals with the study of the phenomenon of crevice corrosion of aluminium by using an example of a corrosion failure of a joint in the automobile coolant circuit. A number of joint failures were studied to understand the corrosion pattern and for various metallurgical aspects like chemistry, hardness and microstructure. The corrosion products were analyzed using Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDS). This analysis indicated that the corrosion products mostly contained Aluminium Oxides with other contaminants like chlorides. The studies revealed that the clamped joint of the aluminium part and rubber hose led to the formation of a crevice with the engine coolant acting as the corrosive medium. The corrosion behavior at the location was affected by environmental factors like temperature, pH and chloride contamination.
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Citation
Pillai, P., Venugopal, S., and Gopalan, V., "Crevice Corrosion of Aluminium and It’s Prevention in Automobile Coolant Circuit," SAE Technical Paper 2017-26-0170, 2017, https://doi.org/10.4271/2017-26-0170.Also In
References
- ASM Vol 13A: Corrosion Fundamentals, Testing and Protection
- http://www.corrosion-doctors.org/
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- Uhlig's Corrosion Handbook Winston Revie R.
- Beynon , E. , Cooper , N. , and Hannigan , H. Cooling System Corrosion in Relation to Design and Materials SAE Technical Paper 780919 1978 10.4271/780919