Mod 7 Discussion

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Embry-Riddle Aeronautical University *

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123

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Mechanical Engineering

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Jan 9, 2024

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docx

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Uploaded by ChiefRaccoon1263

Module 7 Discussion: Putting it All Together - Corrosion Control The article points out a way that hidden corrosion could be detected in aircraft structures. The method that was used was by focusing laser ultrasonic and wavelets that were able to detect corrosion and possibly early corrosion in structures that may not be seen by the naked eye. This was done by placing artificial corrosions in the form of circular shapes on the back of an aluminum 2024 sample that was cut from a particular aircraft and utilizing a heterodyne Mach- Zehnder interferometer. This is a method that can be used to detect early corrosion (Silva, Gouyon, & Lepoutre, 2002). Aluminum is heavily used on many aircraft parts from landing gear to its propellers, and even it’s engines. In most modern-day aircrafts up to 80% of it is composed of aluminum or aluminum alloyed material. Although aluminum is cession-resistant and in its elemental form is highly reactive and forms somewhat a protective layer called aluminum oxide as it reacts with the oxygen that is in the atmosphere. Which prevents deeper layers to not become oxidized by air or water. That does not mean it won’t get corroded. What this means is that the corrosion process will be slower and if not detected before or on time. It may become a catastrophic incident. This article shows a way that corrosion prevention can assist in pinpointing corrosion that may not be able to be seen by the naked eye or can be caught in time to not have to spend more money than needed to treat the affected area. Allowing the aircraft to function properly and safely (ERAU, N.D.). This article is actually pretty awesome because I deal with aircraft and corrosion every day. A similar method like this one, just more advances is used by the military to detect early corrosion. Corrosion is pretty easy for me to speak about simply because I actually have to teach Corrosion Courses to the Marines and Sailors that work on the military aircrafts. The courses I teach range from one week to three weeks. The easiest way to explain what I do is that I teach the basics of corrosion much like this lesson but a bit more in depth. All the way to being able to identify, prevent, detect, and treat corrosion. One of the main things we as instructors try to “stress” in the courses that are taught is that, mishaps due to corrosion are always preventable if corrosion prevention is taken seriously. Hundreds of thousands of dollars are spent on a monthly basis having to replace aircraft parts due to corrosion. We as maintainers have a duty to inspect each aircraft for anything and everything that can be dangerous to the pilot. The military understands that corrosion is a big factor in “downing” aircrafts and they have come up with ways to combat this foe we call corrosion. We have inspection cycles as well as mandated standard operation procedures that should be followed in order to prevent corrosion. If corrosion is detected then we show those military members how to treat it as well.

References ERAU. (n.d.). Module 7 lesson . Embry-Riddle Aeronautical University - Login. Retrieved from https://erau.instructure.com/courses/139075/pages/module-7-lesson? module_item_id=8210489 Silva, M. Z., Gouyon, R., & Lepoutre, F. (2002, December 13). Hidden corrosion detection in aircraft aluminum structures using laser ultrasonics and wavelet transform signal analysis . Ultrasonics. Retrieved from https://www.sciencedirect.com/science/article/abs/pii/S0041624X02004559

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