Toilet bowl cleaner.


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Fshu
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Toilet bowl cleaner.

Post by Fshu »



hey guys, I am bringing back an old rototiller that rusted to pieces. The gas tank was coated inside with rust so I soaked it in toilet bowel cleaner and its now clean bare metal. I've restored a few bikes and rust in the tank was always a problem. This trick just saved me a few hours of shaking so I thought I would share it.


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Re: Toilet bowl cleaner.

Post by dingdong »

Fshu wrote: Sun Aug 01, 2021 6:35 pm hey guys, I am bringing back an old rototiller that rusted to pieces. The gas tank was coated inside with rust so I soaked it in toilet bowel cleaner and its now clean bare metal. I've restored a few bikes and rust in the tank was always a problem. This trick just saved me a few hours of shaking so I thought I would share it.
Don't forget to flush it......Lol.
Fshu
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Re: Toilet bowl cleaner.

Post by Fshu »

Not only funny but an excellent point. You also have to coat the tank with MMO to prevent flash rusting
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Re: Toilet bowl cleaner.

Post by WingAdmin »

Toilet bowl cleaner is a powerful acid, with a pH of 1 to 2, which is why it would eat the rust right off the inside of a tank.

Muriatic acid (commonly used for swimming pools) is equally acidic, and about 1/4 the price by volume of toilet bowl cleaner, so you might consider that as well.

In either case, make sure the treated tank is well ventilated, as some pretty noxious gases are given off as the acid does its work.
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Re: Toilet bowl cleaner.

Post by LAB3 »

WingAdmin wrote: Mon Aug 02, 2021 10:22 am Toilet bowl cleaner is a powerful acid, with a pH of 1 to 2, which is why it would eat the rust right off the inside of a tank.

Muriatic acid (commonly used for swimming pools) is equally acidic, and about 1/4 the price by volume of toilet bowl cleaner, so you might consider that as well.

In either case, make sure the treated tank is well ventilated, as some pretty noxious gases are given off as the acid does its work.
Make sure to find some that's either NOS or perhaps left over from long ago. The old timers will all tell you that the acid that's around these days is nowhere near as good as what they had in the 60's.
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Re: Toilet bowl cleaner.

Post by bri720a »

The Works toilet bowl cleaner from the dollar store.... about the strongest nastiest stuff you can buy. Works wonders and does a good job of making soda bottles pop when you add a little foil in it. :mrgreen:
MalcolmS
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Re: Toilet bowl cleaner.

Post by MalcolmS »

Just be careful of hydrochloric (muriatic) acid. It has chloride ion in it that causes flash rusting. The best acid to use is phosphoric acid as this not only removes the rust but passivates the steel reducing the tendency to flash rust. It also phosphatises the steel which provides a “key” for paint (or tank coating resin) to stick to. Phosphoric acid is available in rust remover formulas, some toilet bowl cleaners, Coke and Pepsi. (Coke used to and may still be the biggest civilian user of phosphoric acid). Phos acid is much safer than and does not fume like hydrochloric acid. (I’m a long time formulation chemist!)
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Tim 1956
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Re: Toilet bowl cleaner.

Post by Tim 1956 »

bri720a wrote: Thu Aug 12, 2021 12:34 pm The Works toilet bowl cleaner from the dollar store.... about the strongest nastiest stuff you can buy. Works wonders and does a good job of making soda bottles pop when you add a little foil in it. :mrgreen:
That is considered an IED. Your making a bomb. Don't get caught. It's illegal. :)
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Re: Toilet bowl cleaner.

Post by WingAdmin »

MalcolmS wrote: Wed Sep 01, 2021 2:43 am Just be careful of hydrochloric (muriatic) acid. It has chloride ion in it that causes flash rusting. The best acid to use is phosphoric acid as this not only removes the rust but passivates the steel reducing the tendency to flash rust. It also phosphatises the steel which provides a “key” for paint (or tank coating resin) to stick to. Phosphoric acid is available in rust remover formulas, some toilet bowl cleaners, Coke and Pepsi. (Coke used to and may still be the biggest civilian user of phosphoric acid). Phos acid is much safer than and does not fume like hydrochloric acid. (I’m a long time formulation chemist!)
Fantastic information, I was unaware of this tendency of Muriatic acid. I will have to get some Phosphoric acid (it's even sold AS rust remover) now.
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Re: Toilet bowl cleaner.

Post by cbx4evr »

MalcolmS wrote: Wed Sep 01, 2021 2:43 am Just be careful of hydrochloric (muriatic) acid. Phos acid is much safer than and does not fume like hydrochloric acid. (I’m a long time formulation chemist!)
Excellent advice @MalcolmS. I was going to say basically the same thing but not as eloquently. I worked in a production plant where we made phosphoric acid from which we then made fertilizer. The process was interesting, nasty and the smell took some getting used to. Certainly not good for ones health. I used to take weaker solutions of the acid home and use it for cleaning. Quit that job and went to a plant where we used a lot of HCl in the process. Now that is real nasty stuff and handling it takes a little more care. I still buy it by the jug at 31% and reduce it down to 5%. Works great for removing water hardness especially on humidifier pads. Donut use it around anything metal except for a quick dunk and then water flush.
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Re: Toilet bowl cleaner.

Post by Dirtrack650 »

I've used phosphoric acid for years as a rust remover/reformer and metal paint prep. I purchase it by the gallon at Home Depot sold as cement etch/cleaner/painter's prep. Other folks I know also use Zep's CLR, although much more pricey. I'm cheap. I filter my phosphoric acid through painters funnels and reuse it until it's too weak.
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Re: Toilet bowl cleaner.

Post by morrodds »

Here's what I used on the tanks for my '75 GL1000 rebuild. Phosphoric acid base.
https://www.smartandfinal.com/shop/prod ... -gl/680457

No flash rust after, coated the tank with a bit of MMO inside. Make sure you get it to flow through the strainers and outlet tubes!

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Re: Toilet bowl cleaner.

Post by Dirtrack650 »

Nice. Good price too. Similar to Zep's generic CLR but cheaper.
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CnCbuss
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Re: Toilet bowl cleaner.

Post by CnCbuss »

Very good article. This is something I need to do since My reserve line is so clogged up that no longer works.
Just one question – is it safe on the fuel sender unit and the aluminum petcock? Does anything need to be removed?
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Re: Toilet bowl cleaner.

Post by plhcpat »

I’ve used “Scrubbing Bubbles” inside of the fairing on my 85 1200i because mice built a condo in there and the smell was coming out the vents! Sprayed that in and got rid of the pee smell!
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Re: Toilet bowl cleaner.

Post by MalcolmS »

Be very careful of any acid on soft metals such as aluminium, magnesium, brass, zinc etc. The acid will dissolve the zinc and magnesium and badly etch or dissolve the aluminium. It will also remove the zinc (dezincify) brass causing it to weaken substantially. Plastics are mostly immune, steel, iron etc are safe.
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CnCbuss
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Re: Toilet bowl cleaner.

Post by CnCbuss »

MalcolmS wrote: Wed Sep 01, 2021 4:33 pm Be very careful of any acid on soft metals such as aluminium, magnesium, brass, zinc etc. The acid will dissolve the zinc and magnesium and badly etch or dissolve the aluminium. It will also remove the zinc (dezincify) brass causing it to weaken substantially. Plastics are mostly immune, steel, iron etc are safe.
I learned that the hard way. Trying to clean out an old gas powered mower fuel tank, I put in some cleaning vinegar and let it sit overnight . The Aluminum parts on the small tank We are soft as butter 18 hours later.
Any parts of the fuel sender or petcock made of soft alloys? Are these acid truly safe on all parts of the tank?
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Re: Toilet bowl cleaner.

Post by MalcolmS »

Fuel sender is probably a mixture of metal and plastic. Petcock is more than likely soft metal. I would remove them before cleaning. Better to be safe than sorry! Phosphoric acid, acetic acid (vinegar), citric acid, lactic acid, glycolic acid are all safe on all steel and iron. Just be careful of any fuel tank components and remove if not certain they are acid resistant.
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Re: Toilet bowl cleaner.

Post by Solo So Long »

Tim 1956 wrote: Wed Sep 01, 2021 7:20 am
bri720a wrote: Thu Aug 12, 2021 12:34 pm The Works toilet bowl cleaner from the dollar store.... about the strongest nastiest stuff you can buy. Works wonders and does a good job of making soda bottles pop when you add a little foil in it. :mrgreen:
That is considered an IED. Your making a bomb. Don't get caught. It's illegal. :)
Uh . . .no. It is outside of the legal definition of a destructive device (26 U.S. Code § 5845).
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Tim 1956
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Re: Toilet bowl cleaner.

Post by Tim 1956 »

Solo So Long wrote: Wed Sep 01, 2021 7:24 pm
Tim 1956 wrote: Wed Sep 01, 2021 7:20 am
bri720a wrote: Thu Aug 12, 2021 12:34 pm The Works toilet bowl cleaner from the dollar store.... about the strongest nastiest stuff you can buy. Works wonders and does a good job of making soda bottles pop when you add a little foil in it. :mrgreen:
That is considered an IED. Your making a bomb. Don't get caught. It's illegal. :)
Uh . . .no. It is outside of the legal definition of a destructive device (26 U.S. Code § 5845).
https://www.npr.org/sections/health-sho ... made-bombs :lol:
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Re: Toilet bowl cleaner.

Post by thboyd29 »

Your local farm supply store may stock phosphoric acid as something called "Milkstone Remover". The jug that I have says it contains 56% phosphoric acid.
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oldwing1100
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Re: Toilet bowl cleaner.

Post by oldwing1100 »

Evapo-Rust is non-toxic, biodegradable, and does not contain any acids.
Worked well on what used it for.
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Re: Toilet bowl cleaner.

Post by tamathumper »

Rust911 is another one I've heard good things about, and which is non-toxic, water-based, and available as a concentrate.
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Re: Toilet bowl cleaner.

Post by MalcolmS »

I can not say I have ever used Evapo-Rust however it is $95 for 5L here in Oz. Phos acid is a fraction of the price. It is a minimal risk acid that is used in foodstuffs at suitable concentrations.
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Re: Toilet bowl cleaner.

Post by triwing »

ATF after the muriatic acid, was what i used.
Worked well to prevent rust from reforming until reassembled


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