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2,341,067 Views • Aug 2, 2022 • Click to toggle off description
Metals are so necessary and important to modern society that we’ll never escape the problem of corrosion, but the field of corrosion engineering continues to advance so that we can learn more about how to manage it and mitigate its incredible cost.
Errata: Stainless steels have a minimum of 10.5% chromium.
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Producer/Writer/Host: Grady Hillhouse
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Views : 2,341,067
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Date of upload: Aug 2, 2022 ^^
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YouTube Comments - 2,492 Comments
Top Comments of this video!! :3
As one of a small number of people who worked on a design/build of an ozone pilot plant to conduct a feasibility study for the city of Flint, the fact that they chose to ignore our report stating that the use of the Flint river was infeasible due to specific risks, yet they chose to hire another firm and do it anyway is disgusting and heartbreaking for the residents. They should have just continued to utilize the existing source from Port Huron. Seeing the Flint water plant in your video just brings back memories of my time working in that building. It’s unbelievable what politicians will do.
1.7K |
As a coatings / corrosion expert that sees this stuff every single day…. The general population has zero clue as to how bad things truly are. Due to corruption and bad policies, maintenance is left as a last minute thing to address. It’s disgusting and infuriating to see agencies minimize the severity. Love the channel tho man! Keep up the great content!
1.1K |
When I was in the USAF, I had a reason to go to the plane paint shop. The airman that worked there was called a corrosion control specialist. He explained how the aircraft skin, if not properly painted, will fail and the plane will crash. By the time I worked at a nuclear power plant, corrosion control and surface coatings very vital on some systems for the safety of the general public and plant personnel. Paint just doesn't make things pretty, it protects them.
753 |
When it comes to educational content creators, Grady is gold tier. There is a fine line between informative mono tone videos and lively fun videos with maybe less facts, Grady nails it. Thank you for all of your hard work, and for helping share your knowledge with the world!
2.7K |
It's funny that in Germany you call the protecting rust layers from the steel Edelrost, which translates to noble rust. Which in my opinion is a fitting name.
355 |
I have been watching this channel 5+ years with my son to learn about practical engineering things. I just wanted to take a moment to express thanks for the videos over the years. In this video I found the example of Flint Michigan fascinating as no major media reported the detail that I learned here in just a couple of minutes.
215 |
Used to study in structural health monitoring. It's "easy" to detect damage e.g. from impacts, but the slow corrosion is near impossible to detect.
I once saw a part of a chemical plant: It was 2cm of steel (specifically designed to be as inert as possible) and it had holes going nearly through the whole thing. The guy who brought it with him said that they had the thing running for about a day. Not rust, but still corrosion (I think). A few hours longer and they would have had tonnes of acid spilling in their plant.
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Oxidation is also probably one of the most important, yet most underappreciated parts of modern metallurgy too. Without the incredibly thin layers of oxidation on all metals, different objects would "zip up" causing parts that should move against each other to completely seize. An everyday example of this is thread galling where certain metals will lose their oxide layer as they enter an almost oxygen-free environment in a threaded hole. If both metals lose their oxide layer they'll start to stick together.
A lesser known, more historical example is on satellites and other objects in space/vacuum. Solar panel positioners initially functioned very well, but engineers were noticing that they were becoming increasingly more difficult to adjust, and eventually seized. The vacuum environment was perfect for mitigating oxidation, and also destroying it. Metals with a softer, less stable oxide layer had their oxidation flake off and the metals began to "zip up" even if they were completely different elements/alloys (crystal lattices are pretty cool). This led to engineers using and designing materials that had very thick, hard, and stable oxide layers for things such as bearings and other moving pieces. R&D for ceramics also skyrocketed as well.
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As a merchant mariner currently sailing on a rather rusty ship, I'm glad to see you covering corrosion!
449 |
Just started working in steel fabrication a few weeks ago. I’ve been watching this channel for about two years. This entire video is my life right now.
58 |
I'm a roped access building surveyor and have to inspect corrosion on structures on a daily basis. This video is really good and I thoroughly enjoyed it
32 |
(11:08) regarding anti-corrosion agents in the water supply and how "the city of Flint decided against it, again to save on costs", it's worth mentioning how much they saved: not adding orthophosphates saved Flint less than $100/day. The estimated cost of the water crisis that ensued is over $600 million so far, and that's just the monetary cost. The impact on the health of its residents will last for decades, and kids who grew up drinking water with high amounts of lead won't get these IQ points back.
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When I was in the Air Force in the 1970s we had a career field called Corrosion Control. I was on a Preventative Maintenance team that worked on Minuteman Missile sites. One of our team members was a Corrosion Control Technician that we called a "Crud Man." His truck was the "Crud Van."
107 |
When I was a young guy in the late 1980's I got to work on the Hawaii Aloha Stadium rust remediation project. This stadium was famous for hosting the NFL Pro Bowl for many years. It was built of the Corten steel and with little regard for standing water accumulation in areas. I got to see the whole stadium from top to bottom and the ambient sea salt embedded in the local trade winds did quick work of rusting out that structure. They had then sand blasted it all, coated it with epoxy paint and modified parts of it to eliminate standing water. Today they want to tear it down for corrosion reasons so the fix didn't last long.
Corten steel may work well in the US midwest but Hawaii and other coastal areas are a special case.
On the East windward side of the island, I've seen 5 year old cars with rust holes on the roof and doors just from the salt in the air.
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Love your videos. The number of times you’ve introduced something I didn’t even know was a thing …
There is a high chance anytime I watch a new video of yours my world gets larger and sublimely more complex and interesting. Thank you so much 🎉
5 |
I'm an automotive mechanic, I fight the battle with corrosion every day! Great video
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"You're here for engineering not for chemistry" bro I'm hear to listen to a smart guy talk about his passion! Love the videos keep them coming
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5:16 I've dealt with galvanic corrosion a few times myself, both from screwing aluminum fittings onto brass ones. I replaced my plastic valve caps with "chrome" ones because they looked nice. After a few months of winter driving conditions I had to use vice grips to unscrew them. I also screwed an aluminum garden hose coupler to a brass tap. It seized up so bad that I needed a pipe wrench with a cheater bar to break it loose.
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I work in transit infrastructure for NYC and rust is a massive issue especially after winter storms where salt use was rather high and we're playing catch up due to the red tape and work restrictions imposed on us.
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@RealEngineering
1 year ago
The Statue of Liberty is actually a complete remake because they used mild steel and copper for the original. The galvanic corrosion came very close to making the whole thing collapse before it was discovered. I think it took over 1 billion dollars to remake it with better materials
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