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Message: [QUOTE="TARM, post: 413388, member: 578"] Simple Green is corrosive to aluminum and was also shown to be a strong catalyst of Hydrogen Embrittlement which effects aluminum strength. If you do use it you should make a good effort to get every bit of it flushed out. I see no reason to use it as there are many other options known to be aluminum safe and there are just so many little nooks and crevices a IC that needs to keep a seal and hold pressure. Not that just one good cleaning with a through wash would likely cause a real issue but better safe than sorry. On not critical parts it likely would do nothing but ruin the surface over time if not thoroughly removed. I used it for years to clean my engine and bays but I always rinsed very well. I stopped using it after the info below was reported and that it was for sure harmful to alum. Just an FYI on the subject: Simple Green came out with a product specifically for aircraft and aluminum products called Extreme Simple Green to use on aircraft because of the above issues which led to the crash of a Army Chinhook in '92 Alaska. Army maintenance crews were using the basic Simple Green All Purpose Cleaner to clean aircraft which caused aluminum fasteners to fail from hydrogen embrittlement that was found to be directly responsible for the crash. The Extreme version is now approved for use on aircraft and aluminum parts. But I bet it also cost a good deal most as is the case with anything aircraft approved LOL [/QUOTE]

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