Experiment - 24 hours in Caustic Soda Solution!
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- Опубліковано 14 січ 2021
- Ive always wondered what would happen if I left a casting in caustic soda. So today I thought I would found out the answer!
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Rob @ Matchbox Garage
45 Malvern Road, Grays,
Essex, RM17 5TH, UK
#Matchbox #Custom #Restoration - Розваги
OK, I'll bite and be the chemistry nerd... the hot water and caustic soda creates a strong base and a a very strong exothermic reaction (gets real hot which is enough to melt some plastics and some of the paint. It will dissolve metals but it depends on the metal. your spoon has some chromium and nickel in it which reacted with the strong base which is why it bubbled. (note that even cold, the basic solution dissolved the chrome layer of the plastics you sometimes strip. if you put the plastics in the solution when it's cold, i very much doubt the plastic would buckle). however the alloy more or less stayed ok (unless you want to leave the spoon in their longer). the plastics buckled under the heat as they are probably polystyrene that can't take too much heat (you'd get the same buckling with a heat gun). the wheels didn't turn as the axles are much like the spoon and swelled with the basic solution. you will also find that the zinc alloy that the cars are made of got softer which is why they polish up so nice with the wire brush. the wheels themselves are a different plastic (probably polyurethane and thermally set) so they weathered the heat of the reaction a lot better. your fingers feel slippery because caustic soda stripped some of your skin and reacted with the oils on your finger. Early soap makers mixed caustic soda (lye) and fat to make soap. So until your skin has a chance to replenish its oils, your fingers are going to feel weird. Prolonged exposure to the caustic soda will eventually dissolve your skin and your tissue, which is why mexican drug cartels used to put people they killed in a barrel of caustic soda solution. it would dissolve the bodies (and teeth and fingerprints) to the point where they could no longer be identified. OK... that's my purge of chemistry trivia LOL
I don't know what Rob thinks, but you get my vote for the best Matchbox Garage comment EVER. 😄😄😄😄
@@michaelmccue72 LOL
Thanks for the lesson!
So, immediately putting your fingers into a weak acid solution (say vinegar aka acetic acid) after the caustic soda would not prevent the greasy feeling (your own body oils/fat). Am I right?
@@BobPegram not really, because the caustic soda solution is quite a bit stronger. Good PPE is the way to go.
All 3 models survived better than I thought they would.
Good experiment Rob.
👍👍
I like the experimentation angle. Eager to see more videos like it. Nice work, Rob!
At the recommendation of Rob more than a year ago, I use caustic soda for my restorations. It works better than any paint stripper I have ever used, and most of the time it's way faster than stripper. Thanks Rob, and keep the videos ( restoration & experiments ) coming!!
I was incredibly amazed at what happened to the spoon, and also surprised the hot dog jar survived 3 scoops of caustic soda! Well done!
the spoon lost the zync cover, for anodic corrosion. it is due to the fact that it was immerged with a more electroreductive metal league in a ionic solution. basically the chaustic soda bridged the zync to leave the metal on the spoon to go to the metal armour of the cars (they became darker by this, because in this way zync take with it 2 group OH which are very light absorbing).
Great experiment Rob. It is nice to see the effect of the car's exposure to the caustic solution and the importance of separating the parts for appropriate treatment.
Hey rob! This was an awesome idea! I love ur thinking for this video!! I can tell u put a lot of work into this!!! I loved it!!
You actually got people to watch “paint dry.” 👍👍❤️
🤣
I would say the plastic damage is due to the heat from the hot water and exothermic reaction from the caustic soda. Caustic does react with metals, notably zinc which is a key part of die cast metal. My concern is that you can never know what the castings are made from, I left two Matchbox bases from the same car (1600TL VW) in vinegar to remove surface corrosion and forget them - one ended up nice and shiny, the other was pitted beyond saving
So good to see what heat and caustic soda can do. I really like this kind of experiments.
Interesting experiment Rob. I was struck by how dirty the models must've been as the water went dark before you even added the caustic soda.
Great video Rob,the Caustic soda works very welll on the models and fetches old paint off.
Love the experiment
Well that was a interesting experiment rob.thank you.I was curious on what would happen.👍
Very intrigued it shows you have a lot of knowledge and how to do your hobby as a form of art would like to learn more
I've used caustic soda to strip paint from plastic parts for years. Like the other person was saying, it's the temp of the water that warps the plastic. If you use warm water straight from the tap, it strpis it with no damage. Now pot metal on the other hand. I put a 1960 Hubley school bus in and had something come up and forgot it. I remembered about 24 hours later to find it mostly gone. What was left was thinner than a sheet of paper.
Interesting stuff!
Fun to watch this experiment, Rob. 👀
Very neat experiment. I haven't tried that stuff yet
This was interesting to watch.
Definitely know not to handle them without a good rinse.
I would enjoy seeing other experiments you may want to try. :)
Bedford in to the scrapyard diorama, as is! Interesting one!
This is exciting
24 hours at Le Jar....lol
Hello I really like watching your show I want to know where can I get in the United State caustic soda
Please keep up the great work l looking forward to see more of your episodes very soon
Nice idea. Next time, maybe try with a time lapse video? I miss your calming background music :-). Perfect cars for starting your junkyard diorama project? I would enjoy it!
I once worked in a factory and they had caustic soda vats. They were sealed, vented and rinsed without anyone touching them, they had to have safety showers close by. I have also watched a video with a 2 pence coin in acid, the coin was intact but the nickel element was removed, maybe something similar with the spoon. Interesting video though, 24 hours and not 100% paint removal, I was expecting more lol.
Behind the scenes look with Rob on the matchbox Hall of Fame tour well done man I was hoping you would do something like this
Cool experiment!! Next time, you should get a second hot dog jar and put one car in each to see if you get a different result.
Hiya hope you and family are safe and well Interesting experiment rob great video love that Mercedes and it was very interesting indeed rob great content and love the vehicles 🚗❤️
I'd have been interested to see these three taken apart to see what shape the bits like the interiors, windscreens and wheels were in compared to how they should look, broken or not. Especially the base of the Jag... :P Really interesting idea though, fun to watch. Might be worth repeating with 3 brand new, out of the box castings, which are a really cheap buy irl so not prohibitive lol
Good idea
Nice experiment, the spoon surprised me. The worst experience I have had with caustic soda was with aluminum, those two don't mix. I did have a bad experience with "CLR" I left a TootsieToy Jeep in CLR overnight and it almost resolved the casting to nothing.
That's interesting, I might try that
@@MatchboxGarage Don't try aluminum indoors! It's a very bad reaction.
CLR is phosphoric acid which is a very strong acid and will eat most bare metal. Caustic soda is a strong base.
Interesting results guess it was 100% in a way no fails today. Maybe you can now look into a plating experiment, although that process looks complicated using conductive paints and all.
Very interesting and entertaining to watch i wouldn’t mind more 👍 for exemple you could try with regular paint stripper 🙂
👍
Some while ago, I placed several Matchbox Ford Zodiacs into a caustic solution, Nothing much seemed to happen at first so I added more caustic soda. The result was not what I'd hoped for. All the cars came out with pockmarked bodies (a bit like your spoon) and are unsalvageable. Next time, I'll be more patient!
Very brave to try that Rob, good thing they weren't om consignment.
Have you sorted the different paints and their reactions that occur in the caustic solution? Like, does enamel react differently to acrylic paints or lacquers? Does a lead based paint or CA paints(two pack paint) react? I would be interested in those results as well. Excellent video and really well done. Thank you.
I'm never entirely sure what paint is what to know and remember the different reactions each time to be honest mate
I felt like in a chemistry class 😁 Interesting to see the results. For a second part, perhaps you could drill out the cars and discover other details. Good experiment, but please try to use both gloves always 👍
That was interesting Rob and, hopefully, the first of many experiments. Would it be worth trying the individual components(body, base, glass, interior, wheels, axles) into caustic of varying temperatures? There's some stuff we know, like 𝒘𝒂𝒓𝒎 caustic removes chrome from plastics, but it would be interesting to see what happens to different materials, at different temperatures, for varying lengths of time. Varying the amount of caustic must make a difference too? I'd certainly watch a series of these - something different anyway.👍👌😁
I think I'd be starting on another jar of hot-dogs too, just in case.😂
Cheers for now,
Dougie.
I picked up a 22 pistol that had been in a storm sewer for about 10 years. The stainless steel had a couple of spots of pinpoint pitting. The nickel plated parts looked great but on cleanup, all that was left was the plating. The carbon steel was almost gone. That may be the case with the spoon.
Hi rob i love the vid i was stripping a corgi chevrolet and the chrome stripe through the centre of the car is one piece of plastic which the front and rear lights are 1 piece. I dipped it for 10 secs in the caustic to remove the chrome and the whole thing warped so bad it ruined it. Iv seen people do it before and it didn't happen?
I dissolved most of a rattle gun in Caustic in about 30 minutes, but that was a whole pot (500g) of of granulated caustic & just enough water to get it going, I'd add more as it boiled off.
Cool experiment Rob. I wonder, if you could somehow keep the temperature up, would the reaction last longer and will it be long enough to burn through? The reaction to the windscreen was interesting. 😉 Thx for this Matchbox laboratory video. I enjoyed it. 👨🔬
I do have to say this is an interesting video indede. And In all honesty I think there cars can be used for a mad max build
Hi Rob very cool experiment with the cars over night in the jar and it’s good to see what happens to them I am wondering what would happen if you would put a car in cam dip never tried that wondering if that would work for stripping a car
That Jaguar would look nice with the Silk Cut livery
I was waiting for the jar to explode.
Maybe the boiling water warped the plastics?
It's possible but I think unlikely
Very interesting experiment. I must say, in my opinion, the plastic melted and warped from the boiling hot water. I tried to fix a warp in a model car body with boiling water and I too melted and shrank it. Just my 2 cents.
I would ask... I have some very old majorettes and hot wheels needing a well deserve restoration. Do you do those brand to? the techniques you show apply to them to?
I will play with any brand
Nice job Rob. I use a black builders bucket in the back yard full of boiling water and Caustic soda. Only needs ten minutes. usually get 100%. interesting experiment though. 24 hours proved no good as the water cooled.
Yeah seems it was only active as long as it was hot
Good experiment, Rob. I was wondering if your fingers felt odd, because the caustic soda was reacting with the oils in your skin, and, well, chemically converting them to soap? Sodium Hydroxide will do this, and it's not good. I did read somewhere that in some countries, sodium hydroxide is used to dissolve roadkill, for disposal.
nice to know what happen the windows and plastic
That Bedford van is a pretty cool casting.
Also, maybe I just missed you saying it, but what will you do with the castings now?
No plans to be honest
How long is it safe to leave plastic parts in the solution before buckling occurs?
I think there are many variables
How about doing a cut in half sectional build?
The same as manufacturer's did for displays at Motor Shows. I think it'd look pretty impressive.
Good idea
Great video! I was curious what would happen if it sat in the caustic soda too long and now I can see what happens to plastics. I recently bought some caustic soda and wondered how it compares to the aircraft stripper I’ve been using.
Definitely good information! What do you normally use to clean off that oily residue from the caustic soda?
I use a brush under hot water. Then after the Dremel wire brush I use a degreaser before painting
I'm amazed the wheels were intact, albeit warped, and the interior of the Merc looks untouched. Don't know what you're gonna do with these models but I wouldn't mind them for a junkyard diorama I'm thinking of making.
The taxi just needs some new A Pillars and a window... The black van looks like it has metal fatigue because of the cracks
Caustic Soda for me every time Rob
cant believe the spoon got affected. as for ideas send them to danny for Gasland builds lol. hope all is well with you and yours
The sodium hydroxide reacts with your skin oil. It is similar to making soap, that is why your fingers feel slick.
That makes sense as I'm sure I read once there you use caustic soda to make soap right?
It might be cool to "rescue" the bodies of the your experiment cars by polishing them until they are mirror shiny and then hit them with a clearcoat (no bases, windscreens or wheels).
I believe the water temperature had more to do with the deformation on the plastics than the caustic soda. Also do you think it would have made a difference if you had washed the entire castings prior to the emersion into the hot water and caustic soda application?
Not sure what difference cleaning them beforehand would make
Could the windscreen and the seats inside the plastic the affected just buy the Heat? Or is the caustic soda the one? Maybe combination of both. Thank you. Very interesting.
I think the caustic
Never did 3 tablespoons but it is 3 models whole as well
Hey Rob,
Have you ever done a video of your workspace, showing where you make the magic? (I mean the hobby space, not the bedroom)
He did this recently. Check past videos.
What Judi said..😎
I wonder how using a ultrasonic cleaner to agitate the solution and keep it at a set tempature would effect the paint removal process over all.
You could place the footlong jar in a pot of water heated on a slow burner to keep it warm/hot longer.
The ultrasonic cleaner would not last very long.
They make corrosion resistant trays and liners for ultrasonic cleaners that could handle the caustic soda solution.
If only you could get this many views on your other videos!
Well now you have some great cars for a post apocalypse model
Also you could use the base of an old coffee maker like Me. Coffee to keep the water hot. You should of course test it first.
That's a good idea
I'm guessing the spoon is chrome plated, not stainless? Caustic can be used to remove chrome.
Hey Rob just curious to what brand name or what kind of caustic soda you are using?
Unbranded from eBay
Not a 100% today Rob, I wonder how much to having another car next to or on top off effected the coverage of the soda and the reaction.
Wuaooo Mercedes❤❤❤🇩🇪
I would like to see what only one car does in 24 hours 👍 this was very interesting to me though...
I work for a company that does passivation and anodization. Sodium bicarbonate aka baking soda will neutralize caustic soda.
Thanks for the advice
I would have added more water after the caustic soda to cover the van.
I wonder if it was the boiling water that distorted the plastic pieces more so than the caustic soda?
Possibly
Next? Ya put Your detures in battery acid, yes? LOL 😉
The actor formerly and presently known as "The Spoon" will continue to do it's job.
Well, a few of the "I wonder if" questions were answered with this experiment.
I love how this video is 24 minutes and 48 seconds long. 😜 Was that intentional?
Everything is intentional
Very cool Experiment but I'm still wounding what is Caustic Soda ?
Give it a Google mate
I'd like you to take them apart and see the interior and check out the full damage to the plastics, wheels etc. Otherwise a cool video.
That's a good idea for maybe the next time I do one
Did anyone notice the bottom of the glass cracked when Rob dropped the spoon?
It didn't crack, I have used the jar since
Why does the taxi's model look so big compared to other 2?
Different scales would you believe!!!
@@TheGrumpyEnglishman yeah what you think is the scale of the taxi?
Restore those die cast aluminum cars, they will look nice
Please restore the van for me I Beg you
Will you do it matchbox garage?
Well you could always post apocalyptic those three
Cool experiment, but I believe you added too many variables??
Possibly
Invest in a Pyrex beaker before that thing breaks.
This is version 2
@@MatchboxGarage wear good goggles that stuff is no joke.
I was watching and waiting for the 3 cars to be stuck into one blob of metal and plastic.
Next time you want views drop 3 cars into
H2SO4 , NOW that will get you views .
😂😂😂😂😂😂😂
H2SO4 = Sulfur Acid .
boiling water against plastic parts doesn't seem so smart...