removing scale from mild steel

Patrick · Post by **Patrick** » Fri Jan 02, 2004 1:02 am

Okay, I know that this has been covered many times. I just never kept a copy of the replies because I didn't think it would matter to me...

I remember someone saying that scale could be removed with muriatic acid from a pool store. Well, in Fairbanks Alaska, there aren't any. Especially in January.

What else can be used for removing scale from mild steel? Help me out here?

-Patrick

Halberds · Post by **Halberds** » Fri Jan 02, 2004 1:11 am

The same acid is in the hardware store for removing excess cement in brick work.

Check your building supply.

I use a 4 to one ratio. Add acid to the water.
Keep your container covered and safe from freezing.

Hal

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Happy metal pounding

ROC · Post by **ROC** » Fri Jan 02, 2004 1:13 am

I use vinegar soak the piece over night and the scale will rub off.Some times i'll soak the piece 4-5 hours and sand the scale off.
this work well and A lot safer than swimming pool acid just takes A little longer.
Allmost forgot make sure your piece is fully submerged in the vineger or it will rust like crazy.
ROC

ROC · Post by **ROC** » Fri Jan 02, 2004 1:15 am

How long does that methed take Hal.I would like to speed things up were I can.
Thanks ROC

[This message has been edited by ROC (edited 01-02-2004).]

Halberds · Post by **Halberds** » Fri Jan 02, 2004 2:11 am

On old hard hot rolled mill scale, about 30 minutes.

I use a 5 gal. bucket. I pound and shape my pieces first. so they fit in the bucket unassembled.

Then go to the sanders and finishers after the mill scale is gone.

It turns into a soot that wipes right off after rinsing with clean water.

Hal

Ps: It will also remove rust, and I suppose with some resist one could etch somewhat with it.