This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Crevice Corrosion Accelerated Test for Cylinder Head/Gasket/Monoblock Assemblies from Lightweight Engines Considering Overheating Effects
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on April 14, 2020 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Severe crevice corrosion occurring at the joint of cylinder head/gasket/mono-block from lightweight engines causes accelerated dissolution of lightweight material, in particular, in the cylinder head. It facilitates the linking of cooling vessels with the combustion chambers or oil vessels in both the cylinder head and monoblock. It is conductive to combustion of coolant or oil, and contamination of oil with coolant or vice versa, which is considered as catastrophic engine failure. Since crevice corrosion is dependent of assembly characteristics, coolant and engine operation conditions, full-scale tests are the most frequent alternative for this type of evaluations. Nonetheless, they are very long and expensive, and sometimes, unreliable. Alternatively, the standard procedure ASTM-G78 is widely used to evaluate accelerated crevice corrosion of different metallic materials under certain specified immersion conditions using a corrosive media. However, this method does not cover the characteristics and conditions existing at the cylinder head/gasket/mono-block joint. This paper presents an accelerated test consisting on three-electrode cyclic potentiodynamic anodic polarization and polarization resistance standard tests using special assembly samples to replicate the actual cylinder head/gasket/mono-block joint conditions in a corrosive solution. Four lightweight materials (Al-Si-Cu alloys) extracted from different cylinder heads, and a typical cylinder head gasket were used to prepare the specimens. Before the corrosion test, samples were subjected to thermal cycles at 200 and 400°C, respectively, to replicate engine overheating situations. The test duration for each specimen, excluding sample preparation, was around 4 hours allowing the formation of localized crevice corrosion areas at the sealing gap of the samples while obtaining information of corrosion rate and electrochemical behavior. This test could be potentially used to evaluate a wide range of materials, gaskets, coolants, set or assembly parameters, etc., especially for engine durability purposes.
- Leonardo Farfan-Cabrera - Tecnologico de Monterrey, EIC, Puebla
- Gerardo Rodríguez-Bravo - Instituto Politecnico Nacional Esime Zac
- Roberto Vega-Moron - Instituto Politecnico Nacional Esime Zac
- César Reséndiz Calderón - Tecnologico de Monterrey EIC CEM
- Jesús Godínez-Salcedo - Instituto Politécnico Nacional ESIQIE
CitationFarfan-Cabrera, L., Rodríguez-Bravo, G., Vega-Moron, R., Reséndiz Calderón, C. et al., "Crevice Corrosion Accelerated Test for Cylinder Head/Gasket/Monoblock Assemblies from Lightweight Engines Considering Overheating Effects," SAE Technical Paper 2020-01-1067, 2020.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
- Hamada, N. and Suzuki, K. , “A Study on Corrosion Occurring at the Sealing Gap between Aluminum Alloy and Rubber Gasket,” SAE Technical Papers 2014-01-0997, 2014, https://doi.org/10.4271/2014-01-0997.
- Fontana, M. , Corrosion Engineering (New York: McGraw-Hill, 1990).
- Daugherty, M.W. and Koenig, R.F. , “Service Tests Solve Aluminum Cylinder Head Corrosion Problems,” SAE Technical Papers 490093, 1949, https://doi.org/10.4271/490093.
- Baba, H. and Katada, Y. , “Effect of Nitrogen on Crevice Corrosion in Austenitic Stainless Steel,” Corrosion Science 48(9):2510-2524, 2006, doi:10.1016/j.corsci.2005.09.010.
- Nagarajan, S. and Rajendran, N. , “Crevice Corrosion Behaviour of Superaustenitic Stainless Steels: Dynamic Electrochemical Impedance Spectroscopy and Atomic Force Microscopy Studies,” Corrosion Science 51(2):217-224, 2009, doi:10.1016/j.corsci.2008.11.008.
- Cai, B., Liu, Y., Tian, X., Wang, F. et al. , “An Experimental Study of Crevice Corrosion Behaviour of 316L Stainless Steel in Artificial Seawater,” Corrosion Science 52(10):3235-3242, 2010, doi:10.1016/j.corsci.2010.05.040.
- Ortíz, M.R., Rodríguez, M.A., Carranza, R.M., and Rebak, R.B. , “Determination of the Crevice Corrosion Stabilization and Repassivation Potentials of a Corrosion-Resistant Alloy,” Corrosion 66(10):105002-105002, 2010, doi:10.5006/1.3500830.
- Nystrom, E.A. , “An Approach for Estimating Anodic Current Distributions in Crevice Corrosion from Potential Measurements,” Journal of The Electrochemical Society 141(2):358-361, 1994, doi:10.1149/1.2054731.
- Cho, K. , “Demonstration of Crevice Corrosion in Alkaline Solution without Acidification,” Journal of the Electrochemical Society 137(10):3313-3314, 1990, doi:10.1149/1.2086211.
- Abdulsalam, M.I. and Pickering, H.W. , “Effect of the Applied Potential on the Potential and Current Distributions within Crevices in Pure Nickel,” Corrosion Science 41(2):351-372, 1998, doi:10.1016/s0010-938x(98)00103-6.
- Al-Zahrani, A. and Pickering, H. , “IR Voltage Switch in Delayed Crevice Corrosion and Active Peak Formation Detected Using a Repassivation-Type Scan,” Electrochimica Acta 50(16-17):3420-3435, 2005, doi:10.1016/j.electacta.2004.12.017.
- Karayan, A.I., Guerrero, J.E., and Castaneda, H. , “Single-Boss Crevice Former for Studying Crevice Corrosion of UNS S32003 in Chloride-Containing Solution at High Temperature,” Journal of Alloys and Compounds 619:544-552, 2015, doi:10.1016/j.jallcom.2014.09.060.