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SE2.1 Investigation of Wear and Corrosion Protection of AlSi20 Coatings Produced by Thermal Spraying and Laser Cladding on AZ31B

Monday, May 21, 2012: 1:20 PM
Room 339 AB (Hilton Americas Houston )
Ms. Christiane Schulz , Surface Engineering Institute, RWTH Aachen University, Aachen, Germany
Prof. Kirsten Bobzin , Surface Engineering Institute, RWTH Aachen University, Aachen, Germany
Mr. Nils Kopp , Surface Engineering Institute, RWTH Aachen University, Aachen, Germany
Mr. Thomas Warda , Surface Engineering Institute, RWTH Aachen University, Aachen, Germany
Ms. Gesa Rolink , Chair for Laser Technology, RWTH Aachen University, Aachen, Germany
Dr. Andreas Weisheit , Chair for Laser Technology, RWTH Aachen University, Aachen, Germany
Magnesium and magnesium alloys are the lightest structural materials with an approximate density of 1.7 g/cm³ (density aluminium 2.7 g/cm³). Due to poor corrosion protection and wear resistance properties, they need to be coated for usage in lightweight constructions. AlSi20 was found to be a suitable coating material to improve the properties of parts made of the magnesium alloy AZ31B. Within this work coatings are performed by thermal spraying, laser cladding and the combination of both processes. These coatings are investigated regarding corrosion protection and wear resistance. Corrosion protection is tested using electrochemical methods in 3.5 % chlorine solution, wear is investigated with a pin-on-disc tribometer. The summarised results show a comparison of the studied processes and generated coatings.
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