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Molasses Rust Removal
I know this has been covered in several other threads but I cannot track down the formula for making up this solution. I have some small bits I thought I would give it a go with so can anyone post the formula, any prep recommendations before soaking, wait times and cleanup.
It might make a useful central source for others down the road. Thanks, David |
#2
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Check this thread, around post #5 and beyond... http://www.mapleleafup.net/forums/sh...590#post210590
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1953 M37 CDN 1953 M38A1 CDN 1967 M38A1 CDN2 Last edited by Hanno Spoelstra; 03-03-16 at 19:02. Reason: fixed link |
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Wayne, I had a conversation with John on just this topic the other day. He indicated that once all the grease and loose crud was off, the subject was submerged in a 50/50 mix of molasses and water. Molasses from the feed store variety. He uses the large wheeled garbage cans and other plastic tubs suited to the size of the part. Cover to keep evaporation at a minimum, wildlife out and forget about it for awhile. Weeks and months, not days.
I have an old JD crawler with some pretty rusty parts that I will try this on. I still have to figure out the chemistry of this process, but it apparently works. Somewhere on YouTube, there is a guy fro Australia that swears by it. Let us know how it works for you... https://www.youtube.com/watch?v=vq5IUiYMhRM Last edited by Jes Andersen; 03-03-16 at 06:55. Reason: added youtube link |
#4
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Get yourself a 240/12 volt converter, a bin of water and a bag of washing soda. Much quicker and doesn't stink like molasses.
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#5
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I used a water/ molasses mix in the ratio of 10/1, so there is a wide range of options here.
Photo's from a v8 timing fixture attached: Before, during, and after..note that the brass was not destroyed, and the decal parts are still in place. Took about 10 days on the kitchen counter.. Toothbrush , soap and water to clean up. A pressure washer for bigger bits, I imagine.
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Charles Fitton Maryhill On., Canada too many carriers too many rovers not enough time. (and now a BSA...) (and now a Triumph TRW...) |
#6
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I have heard of this but never tried it. Have a batch of bolts sitting in a bath right at the moment and will see for myself in a while how well it works.
Charlie, looks like your timing fixture came out really nice!
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3RD Echelon Wksp 1968 M274A5 Mule Baifield USMC 1966 M274A2 Mule BMY USMC 1958 M274 Mule Willys US Army 1970 M38A1 CDN3 70-08715 1 CSR 1981 MANAC 3/4T CDN trailer 1943 Converto Airborne Trailer 1983 M1009 CUCV RT-524, PRC-77s, and trucks and stuff and more stuff and and....... OMVA, MVPA, G503, Steel Soldiers |
#7
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I took a 200L steel drum, put a 20L pail of molasses and the rest water. I hang a basket in it for small parts and throw the lid on it. Works well. In the photo you can clearly see which part of the fender didn't fit in the barrel.
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40 Chev Cab 11 41 Ford Cab 12 FAT 42 Chev 1 1/2 ton G506 1943 Chev M6 Bomb Truck 1942 Slat Grill MB 1952 M38 x2 1955 GMC M215 1955 M38A1x2 |
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Quote:
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Regards, Hanno -------------------------- |
#9
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Mollasses rust removal
Without belaboring this thread I have been a huge fan of molasses rust removal since I heard about it 25 years ago.
Ratio if water to molasses is not critical. I have used 1:1, 2:1 and even 4:1 and it still eats away the rust but perhaps at different speeds. Always best to remove as much heavy rust as possible before soaking, by wire brush and even a scaling hammer if needs be, as in the case of the rims shown. In the case of those wheels I took them out after a fortnight, hit them with the Gerni which removed most of the rust and put back in the tank for another week or two for the final clean. Some myths are around that it eats steel. It does not, but because it is a thorough clean of all the pitting in the steel the misbelief is that it has eaten away some of it. I had one set of wheels sandblasted and another I did in molasses. The rust removal of all the rust was far superior in the ones done in molasses.
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F15-A 1942 Battery Staff Jacques Reed |
#10
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David,
I used a 1:1 mix ratio. I waited about three weeks before taking the parts out; than washed the parts with lots of water. The parts start rusting again in minutes!, so this is something to keep in mind. There are quite a few video's on the method on youtube, as Jes also pointed out. In my experience it works excellent for cast parts. I had some trouble with a very thin sheet metal piece....which got partly eaten. However, as Jacques pointed out this is not the molasses eating the steel, but just the molasses removing all the rust...sometimes leaving less material than you anticipated when looking at the rusted part. I don't know if others have experienced this, but I did my molasses test in Winter.......... at first it worked excellent, but after a few weeks it seemed it lost it's power and crystals also started showing on the surface of the parts. I presume this is bacuse the solution had frozen(?). Oh....yes, it does smell. BUT..........you can just go to work, and the molasses continues on your restoration while you are away
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Chevrolet C8 cab 11 FFW BSA Folding Bicycle |
#11
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Quote:
Regards Rick.
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1916 Albion A10 1942 White Scoutcar 1940 Chev Staff Car 1940 F30S Cab11 1940 Chev WA LRDG "Te Hai" 1941 F60L Cab12 1943 Ford Lynx 1942 Bren Gun Carrier VR no.2250 Humber FV1601A Saracen Mk1(?) 25pdr. 1940 Weir No.266 25pdr. Australian Short No.185 (?) KVE Member. |
#12
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This is very interesting to follow, I have a set of Scammell pioneer overall tracks that I would try dipping in molasses, and then a set of carrier tracks.
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1941 Chevrolet, Cab 12 CGT, 7A2 body 1944 Ariel W/NG 1944 Scammell Pioneer SV/2S x 2 1955 Austin Champ, 04BF45 |
#13
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Temperture
Hi Guys
One comment/question that I would add on molasses, washing soda, electrolysis, cleaning/degreasing of parts, temperature of the fluid. I've tried most of these different methods for degreasing and rust removal, what I have noted is the temperature plays a big part in how quick and well the process works. For example washing soda at 180F/82C will degrease and remove paint from small parts just soak the parts for 1/2 hour and then scrub the with a medium stiff brush and the grease and even the OD paint comes off. Yet soak the same parts in same solution overnight at room temperature and nothing happens. Washing Soda when used for electrolysis doesn't seem to work for rust removal when the solution is much below room temperature. Discovered this, one winter, when I had my plastic tube in the corner of the shop away from the furnace result the tank never got much over 40F/4C rust removal was very slow yet when it was in the direct hot air blast of the furnace progress was much better. Has anybody else noticed temperature as being a significant factor? Cheers Phil
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Phil Waterman `41 C60L Pattern 12 `42 C60S Radio Pattern 13 `45 HUP http://canadianmilitarypattern.com/ New e-mail Philip@canadianmilitarypattern.com |
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Molassas and carrier tracks
Picked up a plastic water bin (called an IBC COntainer - 275 gallons) inside an aluminum frame. I intend to cut open the top and use my hoist to place three bren carrier tracks down in.
The tracks had been rolled up and have rusted in place. I hope the molasses method can free them up so I can see what repairs must be done. Once set in the tank, I can use the hoist to load the tank with tracks - no liquid yet - for transport to a friends' farm for long term storage. Once there, will use a front-end loader to hoist the tank off the truck and set in place, then fill with 1 part molasses : 10 parts water. Going to be a lot of molasses... about 25 gallons I expect. Using a wheelie bin for the other loose parts and a smaller submerged basket for the even smaller parts sounds promising too. Here is a link if I can get it to work. http://www.uline.com/Product/Detail/...w&gclsrc=aw.ds http://www.uline.com/Product/Detail/...w&gclsrc=aw.ds Last edited by Jim Burrill; 20-04-16 at 17:14. Reason: updated info on container |
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Can't wait to see how this works out for you Jim, I don't think you"ll be disappointed.
Pressure washer when it comes out, be ready for rust again quickly (shouldn't matter here) and have fun
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Charles Fitton Maryhill On., Canada too many carriers too many rovers not enough time. (and now a BSA...) (and now a Triumph TRW...) |
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There is a product called Hold-Tite which, when sprayed on immediately after pressure washing your materials, will prevent flash rust for 48-72 hours until you have time to paint/oil or otherwise do.
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3RD Echelon Wksp 1968 M274A5 Mule Baifield USMC 1966 M274A2 Mule BMY USMC 1958 M274 Mule Willys US Army 1970 M38A1 CDN3 70-08715 1 CSR 1981 MANAC 3/4T CDN trailer 1943 Converto Airborne Trailer 1983 M1009 CUCV RT-524, PRC-77s, and trucks and stuff and more stuff and and....... OMVA, MVPA, G503, Steel Soldiers |
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Since these are bren carrier tracks, I assumed there shouldn't be any paint or oil on them.
What should be used? |
#18
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Nothing - I was thinking more of the other stuff that you are going to do.
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Charles Fitton Maryhill On., Canada too many carriers too many rovers not enough time. (and now a BSA...) (and now a Triumph TRW...) |
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