Evaluation of Coating Methods for Corrosion Protection of Magnesium Castings

1. Evaluation of Coating Methods for Corrosion Protection of Magnesium Castings RPI Masters Project Final Report Siobhan Fleming 8/6/12

2. Agenda • Project Review • Research Review • Magnesium • Magnesium Alloys • Magnesium Coatings • Recommendations for alloys and coatings

3. Project Review • Extensive review of technical journals completed • Magnesium Alloys • Coating for corrosion protection • Review highlighted new technology in coatings that may be very successful in corrosion protection with more research. • Good alloys for certain application were identified throughout the document and segregated in a final table.

4. Research Review • Technical journals reviewed through electronic village • Offered excellent details for specific uses • Provided insight into new technologies • Specific texts reviewed for background on magnesium, magnesium alloys and coatings for corrosion protection

5. Magnesium • Lightest of light metal alloys • Low Density • Good Heat Dissipation • Good Damping • Good Electro-magnetic shield • Useful in applications were weight is a critical design element • Susceptible to corrosion

6. Magnesium Alloys • Alloys designed to improve corrosion resistance • Specific elements offer different benefits when combined into alloy form • Benefits are laid out in table format by element in the paper • Each alloy has its own benefits • Selected alloys are documented in paper for benefits

7. Magnesium Coatings • Numerous different coatings provide coating protection • Example of coating protection for aerospace applications is provided in paper • Cold spray appears to be the future of coatings • More research is required on specific alloys in order to eliminate the concern of galvanic corrosion.

8. Recommendations for Alloys

9. Coatings Advantages and Disadvantages