Potatoes and Evaporust

JPG · Post by **JPG** » Fri Apr 24, 2009 1:34 pm

While on vacation the past 10-14 days, I had one 10-e/r way tube soaking in potato soup. Upon returning, it was removed from its container(yes it is reminiscent of working on stopped up plumbing). The outside was red rust free but with some black oxide spots. The inside was however NOT as pristine as I had wished it would be.
I went and purchased some Evaporust and filled the tube(after plugging the other end). It took just over 1 quart to fill it. I checked it after a couple of hours and decided to let it soak over night.

Although NOT a b4 and after, the comparison photos include the other(of a pair) of the way tubes with NO 'treatment'.

[ATTACH]4156[/ATTACH] 4/26 Added after pix of 2nd tube after onite in Evapo-rust. [ATTACH]4192[/ATTACH]

[ATTACH]4157[/ATTACH] [ATTACH]4188[/ATTACH]

I am treating the inside of the second tube tonight with evaporust b4 placing in potato soup. Will add pix to this post as timely!:) 4/25/ added after pix of second tube after onite/evaporust

AFTER such excellent results with the inside of the first tube, I decided to use a 2" pipe(similar to the potato soup 4" pipe) and totally immerse the tube over night in evapo-rust. It required just over 2 quarts. Since I had originally bought only 2 quarts, it was not totally submerged(about 8-10" short). The opposite end is now being 'treated'. If you were to decide to do this, I recommend purchasing a gallon(I predict I will find MANY occasions to use this stuff)!
The surface seems to 'glaze' over rapidly and I suspect this is new rust forming. The evaporust if not wiped/washed quickly turns slightly stickey. The instructions recommend a coating of evaporust to prevent rust up to 2 weeks.

THIS STUFF ROCKS!!!!!

heathicus · Post by **heathicus** » Fri Apr 24, 2009 2:03 pm

Glad you had better success with the "potato soup" than I did!

mickyd · Post by **mickyd** » Fri Apr 24, 2009 2:33 pm

JPG40504 wrote: I am treating the inside of the second tube tonight with evaporust b4 placing in potato soup. Will add pix to this post as timely!:)

1. How come the rust on the inside of the tube is a concern?
2. Do you re-use the evaporust?

heathicus · Post by **heathicus** » Fri Apr 24, 2009 2:44 pm

I won't speak for what JPG did or didn't do, but I can say the Evapo-Rust is re-usable.

osx-addict · Post by **osx-addict** » Fri Apr 24, 2009 3:02 pm

mickyd wrote:1. How come the rust on the inside of the tube is a concern?

I assume the reason is that if rust continues to do its business from the inside out that it will eventually reduce the structural strength of the metal.. However, I suspect that would take many years. There are liquids you can coat metal with that will ensure the rust stays away.. One of those products was mentioned here -- it's some sort of paint additive- I don't recall the name off the top of my head.

JPG · Post by **JPG** » Fri Apr 24, 2009 7:44 pm

mickyd wrote:1. How come the rust on the inside of the tube is a concern?
2. Do you re-use the evaporust?

1) Because it is there!

2) Absolutely!

Heathicus! Perhaps the degree of rusting can explain the difference. My tubes were only lightly rusted.

JPG · Post by **JPG** » Sun Apr 26, 2009 12:00 pm

The original post has been updated with pix of after treatment of second tube. I decided to treat the outside of the second tube with Evapo-rust since I was very happy with the 'inside' treatment. I am also very happy with the outside treatment results.
It seems to work BETTER than the potato soup and is MUCH FASTER. The cost of the 'plumbing' is also LESS! Evapo-rust ain't cheap however.

This stuff REALLY WORKS. Methinks I will be using it often.

mickyd · Post by **mickyd** » Sun Apr 26, 2009 3:30 pm

JPG40504 wrote:The original post has been updated with pix of after treatment of second tube. I decided to treat the outside of the second tube with Evapo-rust since I was very happy with the 'inside' treatment. I am also very happy with the outside treatment results.
It seems to work BETTER than the potato soup and is MUCH FASTER. The cost of the 'plumbing' is also LESS! Evapo-rust ain't cheap however.

This stuff REALLY WORKS. Methinks I will be using it often.

You sold me jpg. If it get's YOUR seal of approval, that good enough for me. I am going to give it a try on my VERY BADLY rusted ER10 parts(execpt the ways tubes) instead of using electolysis.

JPG · Post by **JPG** » Sun Apr 26, 2009 3:41 pm

mickyd wrote:You sold me jpg. If it get's YOUR seal of approval, that good enough for me. I am going to give it a try on my VERY BADLY rusted ER10 parts(execpt the ways tubes) instead of using electolysis.

JUST for what if's sake, Try an end on a way tube b4 going to the trouble of electrolysis. I am very curious how it works on badly pitted stuff. It really did a job on that drill chuck!!!!!

mickyd · Post by **mickyd** » Sun Apr 26, 2009 4:23 pm

JPG40504 wrote:......AFTER such excellent results with the inside of the first tube, I decided to use a 2" pipe(similar to the potato soup 4" pipe) and totally immerse the tube over night in evapo-rust. It required just over 2 quarts. Since I had originally bought only 2 quarts, it was not totally submerged(about 8-10" short). The opposite end is now being 'treated'. If you were to decide to do this, I recommend purchasing a gallon(I predict I will find MANY occasions to use this stuff)!............

You could cut down on the amount of evaporust to completely submerge a tube using the method above if you were to ALSO place a 1-1/4" sealed PVC pipe into the ID of the tube. Quick mental math says it would take about 30oz. of fluid to completely fill. You could get by with only having to purchase a quart. Buy some ShopSmith stuff with the money you save.