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“It’s kind of a performance experiment,” Vostal said. Also, Vostal said, oxygen is the main corrosive in the atmosphere, but they are using salt water as an additional corrosive to simulate the environment. The aluminum used by Vostal and Defallo is a different alloy than that used in airplanes and satellites. Anything that can interact with silicon, such as chlorine and other halogens, and could be harmful to astronauts, is not allowed on board.Īccording to Vostal, his experiment will mirror the one taking place on the space station, but it won’t be an exact match. Student experiments flying to the space station must be limited to a 10-milliliter silicon tube, which places significant restrictions on what can fly. “We really tried to… understand fluid mechanics and how it also plays a role in corrosion.” “The materials science perspective tries to understand why having a different surface might influence the rate of corrosion or where corrosion is most present,” Vostal said. While salt water will not corrode satellites in space, the oxygen in the water and hard salt will create a similar effect. In addition, a saltwater solution will be used to corrode aluminum so that Defallo and Vostal can understand how water will move in microgravity.
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Vostal came up with the idea of 3D printing the aluminum, which allowed them to choose custom topographies, including a wavy surface, rough surfaces, and a smooth surface, for the experiment. Topographies refer to the shape of the aluminum surface.
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“That can tell us, potentially, if things like the satellites or the space station would corrode faster or slower or if topographies could even influence that.” “The objective of this project is to see how aluminum corrodes in microgravity,” said Defallo. “I consider myself a consultant, rather than a scientist, in this case.”Īccording to Defallo, it is crucial to anticipate the corrosive effects of oxygen on aluminum before launch. “ provide the necessary resources for the project,” said Velankar. But Velankar said he had a limited role in the project and the students were in control of everything. Sachin Velankar, associate professor of engineering, helped Defallo and Vostal with their project. Both teams will travel to Cape Canaveral, Florida, for the launch, scheduled for August 5 at the latest. Pitt students Samantha Bailey, Jordan Butko, Amanda Carbone, and Prerna Dodeja’s project on nanoparticles Silver was also chosen for the flight, along with 31 other experiments. If an aircraft, satellite or rocket were to be compromised mid-flight, it could cause breakage in the aluminum, which would be disastrous for people or instruments on board.Īfter months of planning, research and design and three review boards, NASA chose Defallo and Vostal’s aluminum corrosion experiment to fly to the space station this summer aboard a SpaceX Falcon 9 rocket. Aluminum can pit, creating small holes that weaken the material. When radiation from the sun travels through the Earth’s atmosphere, it splits apart atoms within molecular oxygen (molecules made up of two or three oxygen atoms) creating reactive atomic oxygen that could compromise the structural integrity of aluminum in an airplane or rocket. Using Defallo’s aerospace work experience and Vostal’s materials expertise, they decided on an aluminum corrosion experiment. Together, they were able to come up with the winning idea. Defallo showed up to meetings without a team and found Nikolas Vostal, a materials science and engineering junior, in the same position. SSEP is open to students from around the world and 3,076 teams submitted proposals. When he was looking for an experiment to perform aboard the space station, he instinctively began to think of the material that makes up most of the satellite: aluminum.Īs a student at Pitt’s Swanson School of Engineering, Defallo heard early on about NASA Student Spaceflight Experiments Program when the Pitt Schools of Engineering and Pharmacy began recruiting for the project in September 2019. Airplanes, as well as satellites, they are made from the material because it is light and flexible.
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When Marissa Defallo, a third-year mechanical engineering student, worked at American Airlines for her engineering cooperative, she spent a lot of time working with aluminum. While many college students spend the summer waiting tables, two teams of Pitt students will be at Cape Canaveral viewing the experiments that designed to fly to the International Space Station.