Browse Publications Technical Papers 2009-01-0790
2009-04-20

Wear and Galvanic Corrosion Protection of Mg alloy via Plasma Electrolytic Oxidation Process for Mg Engine Application 2009-01-0790

Sliding wear of magnesium (Mg) engine cylinder bore surfaces and corrosion of Mg engine coolant channels are the two unsolved critical issues that automakers have to deal with in development of magnesium-intensive engines. In this paper, Plasma Electrolytic Oxidation (PEO) process was used to produce oxide coatings on AJ62 Mg alloy to provide wear and corrosion protection. In order to optimize the PEO process, orthogonal experiments were conducted to investigate the effect of PEO process parameters on the wear properties of PEO coatings. The PEO coatings showed a much better wear resistance, as well as a smaller friction coefficient, than the AJ62 substrate. The galvanic corrosion property of AJ62 Mg coupled with stainless steel and aluminum (Al) was investigated via immersion corrosion test in an engine coolant. Applying PEO coating on Mg can effectively prevent the galvanic corrosion attack to Mg. Due to the small thickness of the PEO coating, the thermal conductivity of Mg would not be appreciably affected. The test results showed a great promising in wear and corrosion protection of Mg for Mg engine application.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

The Effect of the Addition of Hard Particles on the Wear of Liner and Ring Materials Running with High Sulfur Fuel

950527

View Details

TECHNICAL PAPER

Effects of Alloying Elements on Wear Resistance of Automobile Cast Iron Materials

2014-01-1011

View Details

TECHNICAL PAPER

Influence of Material and Mechanical Properties on Thermal Fatigue Life of Aluminum Castings

950720

View Details

X