I had great luck with Evapo-rust last summer. I treated maybe 10 legs with great success. I made the PVC tube and all that. I left the tube in the garage over the winter. It was/is cold out there. Currently in the mid 30s.
I put some legs in there over a day ago and they look no better than when I put them in.
I found nothing temperature related in the Evapo-rust FAQ.
Does anybody have any experience in this regard?
It will work much better/faster in warmer temps. I think 60F or above is the recommendation from Evaporust.
Quoted from Bonk:It will work much better/faster in warmer temps. I think 60F or above is the recommendation from Evaporust.
Yep
Quoted from TheLaw:No, because we keep the tube in our basement like civilized Ann Arborites.
How long did you soak it for?
He said he put them in there a day or so ago.
The People's Republic of Ann Arbor has spoken!
I’ve seen multiple posts referring to warmer is better, so I expect that colder is going to really slow down the process. I’d bring them inside and let them just sit. Also, some legs are just not going to improve all that much if they’re too far gone.
I've found the older the stuff without filtering it takes a few days longer.
A few years ago, I accidentally left a leg soaking for over a month. It had a lot of black on it that wiped off, and after cleaning the leg, there was no damage done, and the rust was gone. So, based on my own experience, I don't think you need to worry about leaving something soaking too long.
A quick Google shows…
At what temperature can I use Evapo-Rust?
You can use it as low as 50 degrees, but we recommend using Evapo-Rust at or above room temperature for fastest rust removal.
Here : use at or above room temperature
Quoted from TheLaw:A Bellvillian correcting me...this city has hit rock bottom!
Can I like more than once?
Quoted from dgAmpGuy:I’ve seen multiple posts referring to warmer is better, so I expect that colder is going to really slow down the process. I’d bring them inside and let them just sit. Also, some legs are just not going to improve all that much if they’re too far gone
These legs only had a few small rust dots. They were quite good going in.
Quoted from dr_nybble:Here : use at or above room temperature
I thought 40F or so was room temperature for you Canadians?
Quoted from newmantjn:I thought 40F or so was room temperature for you Canadians?
It’s a toasty 63F in here right now! Got 6” of snow last night, Spring delayed again.
A standard rule of chemistry is that a 10 degree C rise in temperature doubles the speed of a reaction. So, a 10 degree C reduction in temperature halves the speed. This is based on 22 C (72 F) if my memory is working. So at 30 F (-1 C), the reaction would be progressing at less than 25% of normal speed. Add in you said it was old solution, you may be down to 10% of regular speed or less.
As was said earlier, bring the tube inside, let it warm up, and let it work. Good Luck!
Jim
I have a little aquarium heating element that clips in the side of the tube and I have a small pump the circulates the solution to warm is all up evenly. It works great especially out in the unheated garage.
Quoted from Isochronic_Frost:I have a little aquarium heating element that clips in the side of the tube and I have a small pump the circulates the solution to warm is all up evenly. It works great especially out in the unheated garage.
I think circulation is an unexplored key factor.
Quoted from mojonitro:A standard rule of chemistry is that a 10 degree C rise in temperature doubles the speed of a reaction. So, a 10 degree C reduction in temperature halves the speed. This is based on 22 C (72 F) if my memory is working. So at 30 F (-1 C), the reaction would be progressing at less than 25% of normal speed. Add in you said it was old solution, you may be down to 10% of regular speed or less.
As was said earlier, bring the tube inside, let it warm up, and let it work. Good Luck!
Jim
I was wondering if anyone here ever took any Chemistry classes and if so, were they paying attention?
Quoted from Isochronic_Frost:I have a little aquarium heating element that clips in the side of the tube and I have a small pump the circulates the solution to warm is all up evenly. It works great especially out in the unheated garage.
This is sous vide pinball cooking right here! And I bet Isochronic_Frost has got a better, less expensive set-up then this (might work for this application):
Really cool to see that there are now hundreds of gadgets like this, I had no idea! I have a big (20 gallon) thingy that I rigged up with a PID controller in 2011. Really precise temperature control with circulation lets you do geeky food stuff like cook eggs in-shell with the yolks cooked but the whites uncooked (reverse soft boiled if you will) just to surprise and annoy. https://en.wikipedia.org/wiki/Modernist_Cuisine
Quoted from MrBally:I was wondering if anyone here ever took any Chemistry classes and if so, were they paying attention?
I was so excited for Chemistry in high school. Then I realized it was just a 2nd form of math class 
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Ann Arbor, MI
Ottawa, ON
