Improving corrosion and corrosion-fatigue resistance of AZ31B cast Mg alloy using combined cold spray and top coatings

Published: 7 February 2018| Version 1 | DOI: 10.17632/5b5rk27wmx.1
Contributors:
Sugrib Shaha,
Hamid Jahed,
Xin Pang,
siavash borhan dayani,
Yuna Xue

Description

Hypothesis: combined cold spray and e-paint top coatings improve corrosion and corrosion-fatigue of Mg alloys Results:The combined coatings improved the corrosion resistance by a factor of 135, and significantly increased the fatigue life, with a fatigue strength of 80 MPa at 107 cycles, as compared to the as-cast sample. Surface topographic analysis of the corrosion-fatigue-tested samples demonstrated the presence of deep macro-pits on the cold sprayed AA7075 coating after 3.7 million cycles, while there were no such pits on the top coated samples, even after 107 cycles.

Files

Institutions

University of Waterloo

Categories

Coatings, Corrosion, Magnesium Alloys, Corrosion Fatigue, Thermal Spray Coating

License