3 ms·
This may be a dumb question, but why use materials that can corrode on such an important part? Just use stainless steel (or AL or TI), problem solved?
by MrBuddyCasino 6y ago
This may be a dumb question, but why use materials that can corrode on such an important part? Just use stainless steel (or AL or TI), problem solved?
- enraged_camel 6y agoExplain that to the MBAs and bean-counters who are in charge over at Boeing.
- perardi 6y agoI’m guessing some other parameter was more important. Thermal expansion characteristics, ease of tooling, interactions with the materials around it, resistance to some other non-oxidative chemical corrosion…
- benhurmarcel 6y agoThis particular valve sees temperatures above 600°C. You basically need to use steel or inconel.
- AceyMan 6y agobearings and bushings need to be hard to resist wear and maintain their dimensions. Stainless steels hard enough for the job are too brittle and those other metals (Al, Ti) aren't even close to the hardness of any category of steel.
- bluGill 6y agoStainless doesn't corrode, but it tends to corrode any other metal it touches. Depends on alloys and a bunch of other factors, but all stainless isn't the answer either.
- madengr 6y agoI thought it corrodes if scratched and left submerged, like rust spots on utensils in the dishwasher. Something about the chromium not having the proper environment to form an oxide layer, before the iron.