How To Remove Mill Scale

[@txtoolcrib]

Products used in this video: 30% Concentrated Vinegar - amzn.to/3AmghrL 45% Concentrated Vinegar - amzn.to/3R4S4My Dewalt Cordless Grinder - amzn.to/3ycpBMr Magnetic Chuck - amzn.to/3AotIYm 4 1/2" Wire Wheel Brush - amzn.to/3P0BCuY Scotch-Brite Clean and Strip XT Pro Disc - amzn.to/3R9rCRZ

[@swolebro]

I've done exactly that with some 6x10" slabs of 1" plate. They take forever to heat up properly, but if you drop a steak on that, 15-20 seconds per side, let it rest for a minute, then repeat a couple more times until the internal temperature is 127F, you get something magnificent. Similar results to sous vide, but a far superior sear (obviously) and the texture inside has a bit more structure than when you cook it for 2-4hrs in a water bath. Good stuff, man.

[@itsdarkest]

Will it also remove any bits of slag or silicon left on steel after welding?

[@malkavsez69]

Thank you for the video. I can see the tool marks of the wheels. I'm curious how obvious are they if you were to powder coat after?

[@lankplank]

What's the responsible (eco-conscious/safe/legal) way to dispose of the liquid after?

[@500_Days]

Add baking soda, dump. Just make sure you have enough baking soda. The acid solution can be neutralized with the base (baking soda). This reaction produces sodium acetate, water, and carbon dioxide. Sodium acetate is plant-safe and can even do good for a garden by increasing soil pH levels. The iron oxide that was the mill scale turns to iron acetate after reacting with the vinegar, but this will also react with the baking soda, forming CO2, water, and iron carbonate. Iron carbonate is the naturally-occurring mineral Siderite and has even been used as a dietary supplement for anemic or iron-deficient individuals.

[@dandyscorner]

I noticed you put the part on a different table attached to your main table when grinding. Is that a different type of table? Magnet maybe?

[@JC_Musician]

A mild phosphoric acid solution also works well for removing heavy rust. However, I once used too strong a solution on a rusty tool for too long and when I returned the entire tool had dissolved 😅🤣

[@txtoolcrib]

That is precisely why I use a weaker acid.

[@Veldtian1]

😆

[@malaquiasselvagem4397]

Is a lid necessary?

[@FreddyFunderbunz]

I like using vinegar cause I like to take little sips of it 😂

[@stevenespinoza7735]

how would you do a 4ft x 4ft sheet

[@arisskarpetis]

Maybe be vinegar in gel form. It exists for descaling shower panes. Or cover the steel plate withe rags soaked in vinegar, probably on a sheet of plastic.

[@aldomaresca9994]

Thanks for the tip!

[@dwarnermg]

I use strait vinegar for rust removal but it has to be in a well ventilated area because it generates hydrogen gas.

[@stansmith-h2b]

Try a flap disc for a smoother finish😉

[@tylermcgonigal6031]

I tried those discs but they wear out so fast it’s just not economical to use ‘em

[@dwarnermg]

I’m partial to the $9 ones at home dipo

[@russell7386]

Thank you

[@waynec369]

Hydrochloric acid (aka muriatic acid) gets it done in a few minutes - not hours. Bicarbonate of soda & water neutralizes. Rinse well, dry, then prime/paint. No need to beat around the bush when you've got $h!% to do.

[@txtoolcrib]

It also rusts everything the gas comes in contact with.

[@Artifex-h2y]

3:08-4:31 steel mill scale asmr

[@stevelacher8092]

Belt sander

[@lastchance8142]

Muriatic Acid...15 minutes

[@txtoolcrib]

Not in a shop. Muriatic acid fumes will rust any ferrous materials the fumes come in contact with.

[@FreddyFunderbunz]

@@txtoolcrib exactly. I rusted every single pc of bare metal inside my shop just by pouring maybe 8oz of muriatic acid on the floor. What a nightmare

[@907jl]

@@txtoolcrib Exactly. I'll stick with the cleaning vinegar. It's worked great for me for years. Just plan ahead a little, and the few hours it takes for the soak are no big deal.