Evaluation of Corrosion Protection Methods for Magnesium Alloys in Automotive Applications

Blanchard, P. J.; Hill, D. J.; Bretz, G. T.; McCune, R. C.

doi:10.1007/978-3-319-48099-2_94

P. J. Blanchard⁷,
D. J. Hill⁷,
G. T. Bretz⁷ &
…
R. C. McCune⁷

5139 Accesses

Abstract

Magnesium alloys are susceptible to galvanic corrosion. Consequently, it is often necessary to apply coatings to magnesium components for isolation purposes. However, previous publications suggest the effectiveness of commercial coatings can vary widely. Therefore, an extensive corrosion screening study was performed to evaluate pre-treatment and coating systems currently available for use within the automotive industry. This paper focuses on a selection of conversion and anodized coatings. In many instances, these coatings were used in conjunction with either powder coat or an electro-coat to assess the additional protection offered by a supplemental barrier. Scribe test results and corroded area determination after accelerated corrosion testing are presented and used to quantify the pre-treatment performance. These results are supplemented by DC polarization measurements to determine the level of passivation. Finally, SEM micrographs were used to determine coating thickness variability and morphology. The overall performance of each pre-treatment and coating is then assessed with respect to corrosion protection and robustness.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution

Chapter: USD 29.95; Price excludes VAT (USA)

eBook: USD 189.00; Price excludes VAT (USA)

Hardcover Book: USD 169.99; Price excludes VAT (USA)

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

References

Mordike, B.L. and T. Ebert, “Magnesium Properties — applications — potential,” Materials Science and Engineering, pp 37–45, 2001
Google Scholar
Bretz, G., Lazarz, K., Hill, J. & Blanchard, P. “Adhesive Bonding and Corrosion Protection of a Die Cast Magnesium Automotive Door”, TMS 2004.
Google Scholar
Skar, J.I, Sivertsen, L.K & Oster, J.M. “Chrome-free Conversion Coatings for Magnesium Die Casting — a Review”, ICEPAM — International Conference on Environmental friendly pre-treatment for Aluminum and other Metals, Oslo, Norway, 2004.
Google Scholar
Ford Laboratory Test Method BI 123–01. “Painted Sheet Metal Corrosion Test (Laboratory Simulated Arizona Proving Ground Test)”, 2001.
Google Scholar
ImageJ, National Institute of Health, http://rsb.info.nih.gov/ij/
Google Scholar
Rajagopalan, B., Mohanty, P.S., Mallick, P.K., McCune, R.C& Ricketts, M.S. “Corrosion Performance Evaluation of Magnesium Alloys by Electrochemical Polarization Technique,” Magnesium Technology 2004, as held at the 2004 TMS Annual Meeting, Charlotte, N.C., USA, 14–18 Mar. 2004. pp 131–136, 2004.
Google Scholar
Song, G., Atrens, A., Stjohn, D., Nairn, J. & Li, Y. “The Electrochemical Corrosion of Pure Magnesium in 1N NaCl,” Corrosion Science 39 [5], pp 855–875, 1997.
Article Google Scholar

Download references

Author information

Authors and Affiliations

Ford Motor Co., Research & Advanced Engineering, 2101 Village Road, Dearborn, MI, 48121, USA
P. J. Blanchard, D. J. Hill, G. T. Bretz & R. C. McCune

Authors

P. J. Blanchard
View author publications
You can also search for this author in PubMed Google Scholar
D. J. Hill
View author publications
You can also search for this author in PubMed Google Scholar
G. T. Bretz
View author publications
You can also search for this author in PubMed Google Scholar
R. C. McCune
View author publications
You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

Materials Science Division, U.S. Army Research Office (ARO), USA
Suveen N. Mathaudhu B.S.E., Ph.D. (Program Manager for Synthesis and Processing of Materials, Adjunct Assistant Professor) (Program Manager for Synthesis and Processing of Materials, Adjunct Assistant Professor)
Department of Materials Science and Engineering, North Carolina State University, USA
Suveen N. Mathaudhu B.S.E., Ph.D. (Program Manager for Synthesis and Processing of Materials, Adjunct Assistant Professor) (Program Manager for Synthesis and Processing of Materials, Adjunct Assistant Professor)
The Ohio State University (OSU), Columbus, Ohio, USA
Alan A. Luo (Professor of Materials Science and Engineering and Professor of Integrated Systems Engineering, Vice Chair of TMS Light Metals Division and SAE Materials Division and the Chair of SAE Non-Ferrous Metals Committee) (Professor of Materials Science and Engineering and Professor of Integrated Systems Engineering, Vice Chair of TMS Light Metals Division and SAE Materials Division and the Chair of SAE Non-Ferrous Metals Committee)
IND LLC, Canada
Neale R. Neelameggham (Guru) (Guru)
Pacific Northwest National Laboratory (PNNL), Washington, USA
Eric A. Nyberg B.S., M.S. (Chief Engineer) (Chief Engineer)
New Materials & Energy Unit at the research and technology center, European Space Agency (ESA-ESTEC), Netherlands
Wim H. Sillekens Ph.D. (project manager) (project manager)

Rights and permissions

Reprints and permissions

Copyright information

About this chapter

Cite this chapter

Blanchard, P.J., Hill, D.J., Bretz, G.T., McCune, R.C. (2016). Evaluation of Corrosion Protection Methods for Magnesium Alloys in Automotive Applications. In: Mathaudhu, S.N., Luo, A.A., Neelameggham, N.R., Nyberg, E.A., Sillekens, W.H. (eds) Essential Readings in Magnesium Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-48099-2_94

Download citation

DOI: https://doi.org/10.1007/978-3-319-48099-2_94
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48588-1
Online ISBN: 978-3-319-48099-2
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)

Publish with us

Policies and ethics