Author Topic: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**  (Read 7669 times)

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Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #25 on: January 03, 2013, 07:12:17 PM »
I had to sand it repeatedly with 60 grit paper on a palm sander, and it never all came off. What I did was sand, then clean with Barkeepers Friend, then repeat (around 5 or 6 times, if I remember well). I would stay away from a wire wheel since it will likely give you a lot of surface imperfections, which *might* make it more likely that you'll end up with sticking problems.

Barry
my electric sander does a decent enough job of smoothing out the surface


Offline Chicago Bob

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #26 on: January 03, 2013, 07:20:41 PM »
The purpose of the alcohol is to remove oil.  If you have to mechanically remove whatever this is, it isn't oil.  

Make sure to wear sleeves, gloves and eye protection while using the wire wheel.  They tend to throw their bristles.


Not if ya have a good one.... :-D

Barry, 60 grit on a sander would have much more potential to cause surface imperfections than the type of wire wheel he is probably using...especially if you accidentally tip the sander on it's edge. 60 grit can gouge.Sounds like you could have gone with 36/40 first then finished with 60/80 grit.
This is jus the bodyman in me coming out...couldn't resist, sorry.  :-D
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Offline Jet_deck

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #27 on: January 03, 2013, 08:59:19 PM »
An overnight soaking in vinegar and then a light sanding will take it off.

For me, I wouldn't mess around. Naval jelly. Follow the directions, wear proper gloves and do it outdoors.

Then you wash it off with water and it rusts again? 

In my opionion oiling and seasoning the steel plate is no different than using a dough that has oil in it, or pepperoni oil or sausauge oil getting in the steel.  Steel is porous, and some of that oil is going to get all soaked in there regardless of it's smoke point.  I am not against oiling the steel, can you tell?  Regardless, this discussion is probably the least of the OP's worries at this point.  Can we agree on that?
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Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #28 on: January 03, 2013, 09:44:21 PM »
this black stuff aint no joke. its takes serious diggin with 50 grit paper to tear into it, and even then i have to finish it off with 80 grit to see the silver steel underneath.  could the Naval jelly have any chance of breaking through this stuff to make this job easier? all my electric sander does is polish it and make it look nice. it doesnt dig into the finish. i have to put my thumb behind the 50 grit. the wire wheel does a tad better than the sander, but not much to make a difference.

Offline Chicago Bob

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #29 on: January 03, 2013, 10:08:53 PM »
Try a Scotch bright pad with some acetone or Simple Green/Purple Power/Greased Light'in.
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Offline shuboyje

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #30 on: January 03, 2013, 10:15:17 PM »
Reading your last comment it sounds like you are trying to remove the mill scale.  If that is indeed the case it is generally done using smooth continuos strokes with a grinding wheel in an angle grinder.  Down side to that method is without a bit of practice odds are you aren't going to end up with a smooth finish.  Personally I leave the scale on as it is basically made of the same thing as blue steel and will not cause any harm.
-Jeff

Offline ThatsAmore

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #31 on: January 03, 2013, 10:15:34 PM »
mistachy,

Looking at your pics it appears to me that the steel has been chemically treated.  Don't freak out with that terminology.  I say this as it appears your steel has an iridescent color from what I can see in the pics.  It appears to be a phosphate coating or treatment. Some of it may also be milling marks from where it was rolled. Naval Jelly is a thick jell of Phosphoric acid, so I think you're going to end up in the same place.  Personally, I think I'd clean it well, maybe in the dishwasher a few times, and bake it numerous times getting hot as you can a few times. Maybe do numerous crust only bakes before you start loading pies for eating.
Who put that pie in my eye ?

Offline ThatsAmore

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #32 on: January 03, 2013, 10:17:04 PM »
Reading your last comment it sounds like you are trying to remove the mill scale.  If that is indeed the case it is generally done using smooth continuos strokes with a grinding wheel in an angle grinder.  Down side to that method is without a bit of practice odds are you aren't going to end up with a smooth finish.  Personally I leave the scale on as it is basically made of the same thing as blue steel and will not cause any harm.

I'd agree with that, where i was trying to go as well.
Who put that pie in my eye ?

Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #33 on: January 03, 2013, 10:41:03 PM »
Reading your last comment it sounds like you are trying to remove the mill scale.  If that is indeed the case it is generally done using smooth continuos strokes with a grinding wheel in an angle grinder.  Down side to that method is without a bit of practice odds are you aren't going to end up with a smooth finish.  Personally I leave the scale on as it is basically made of the same thing as blue steel and will not cause any harm.
but the residue keeps coming off, i dont think its safe to be ingesting that stuff? when i scrubb it with any pad, the pad turns black. maybe ill use muratic acid...
« Last Edit: January 03, 2013, 11:07:02 PM by mistachy »


Offline Jet_deck

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #34 on: January 03, 2013, 11:33:35 PM »
  maybe ill use muratic acid...

I'm out.  This has gone from simple to acid.

My final .02
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Offline Essen1

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #35 on: January 04, 2013, 12:19:01 AM »
mistachy,

Acid? Sanding?

Seriously? Might as well put the damn thing in the trash right now.

Some tips...

Apply a light coat of a high-smoke point oil on both sides and pop in it the oven for about an hour at 500F.  Make sure you have a fan going at all times.

Turn oven off, let the plate cool down to lukewarm, wipe off with a paper towel. Repeat above process.
« Last Edit: January 04, 2013, 12:22:02 AM by Essen1 »
Mike

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Offline TXCraig1

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #36 on: January 04, 2013, 01:01:49 AM »
Hit it with millisecond pulses from a megawatt-class chemical oxygen iodine laser.
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Offline Ev

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #37 on: January 04, 2013, 07:05:12 AM »
Find a shop that does glass beading. It's like sand blasting but much gentler on the steel. Maybe the shop where you bought it?

Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #38 on: January 04, 2013, 07:35:42 AM »
I'm out.  This has gone from simple to acid.

My final .02
Not so simple. i put in 2 hours of work and only got 10% off. i could use vinegar, but not sure how affective that will be.


UPDATED

Scratch that. I know exactly how affective it would be. IT WORKED.  It took about 12 hours, but the vinegar ate through that thick chit and came right off when i went down stairs this morning.  SO what ive done is take a huge sheet of glass, I put a puddle of vinegar on it and then layed my steel on top of the puddle. i dont have a bath i could use for this so the glass trick will have to suffice. Scott was spot on the with the vinegar. Thanks for all who chimed in. I didnt know what mill scale was before yesterday.

I figure it will be done by 5pm or so, mountain time and i can smooth the surface with my electric sander. ITS PIZZA MAKIN' TIME!!!!!!
« Last Edit: January 04, 2013, 09:27:47 AM by mistachy »

Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #39 on: January 04, 2013, 07:36:42 AM »
Find a shop that does glass beading. It's like sand blasting but much gentler on the steel. Maybe the shop where you bought it?
the steel yard i bought it from only collects sells and cuts.

Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #40 on: January 04, 2013, 07:41:12 AM »
Hit it with millisecond pulses from a megawatt-class chemical oxygen iodine laser.
How about photon torpedoes or forward phase cannons. we could get more power from the deflector array, engage a tractor beam that'll rip that stuff right it off. or how about we transcend just the mill coating to the future with our reactor coil.
« Last Edit: January 04, 2013, 08:25:18 AM by mistachy »

scott123

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #41 on: January 04, 2013, 10:08:23 AM »
DJ, I'm glad the vinegar worked out well for you.  Naval Jelly is the same premise, but, being a much stronger acid will get the job done faster.

I've never heard stories of iron oxide on blue steel pans giving off a black film when rubbed. Even if they did, the seasoning and lower temperature use would seal the oxide in. I really think a vinegar soak/no seasoning is the way to go, and, for those with less patience, naval jelly.


Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #42 on: January 04, 2013, 10:11:58 AM »
DJ, I'm glad the vinegar worked out well for you.  Naval Jelly is the same premise, but, being a much stronger acid will get the job done faster.

I've never heard stories of iron oxide on blue steel pans giving off a black film when rubbed. Even if they did, the seasoning and lower temperature use would seal the oxide in. I really think a vinegar soak/no seasoning is the way to go, and, for those with less patience, naval jelly.
Well it was a normal piece of steel, but it was treated with something thats supposed to prevent rusting. it only had a tad bit of rust on it when i bought it. After several deep digging attempts with a combination of 80 grit and 50 grit sand paper, i was able to break through that stuff and see the beautiful silver steel underneath. The vinegar was slow and i didnt have much patience, but it finally proved to be able to eat through that coating. I believe it is mill scale. It appears to be any way.

Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #43 on: January 04, 2013, 10:33:32 AM »
you can see the stuff in this pic as im trying to scrub it off http://sdrv.ms/Ut7fgA

« Last Edit: January 04, 2013, 10:42:04 AM by mistachy »

Offline shuboyje

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #44 on: January 04, 2013, 10:42:52 AM »
Yup, that's mill scale alright.
-Jeff

Offline TXCraig1

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #45 on: January 04, 2013, 10:56:44 AM »
Please correct me if I'm wrong, but isn't mill scale just various iron oxides and completely harmless?
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Offline mistachy

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #46 on: January 04, 2013, 11:02:23 AM »
Please correct me if I'm wrong, but isn't mill scale just various iron oxides and completely harmless?
I dont know but my hands were filled with black stuff. to the point where you couldnt see the color of my skin. harmless? i dont know... but i dont want to gamble with my health. i think its better, removed.

Offline shuboyje

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #47 on: January 04, 2013, 11:35:10 AM »
Yes the mill scale is just higher level oxides like magnetite, very similar to blue steel.  Although the mill scale itself is harmless it sounds like there was some sort of coating on the steel.  I'd assume it was some sort of oil, but if so the alcohol should have removed it.  If the vinegar removed it that's all that matters, who cares if it took the mill scale with it. 

Now let's see some pizza, lol.
-Jeff

Offline Chicago Bob

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #48 on: January 04, 2013, 12:19:03 PM »
I'm glad we got to the bottom of this fellas.... :)

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Offline Bugsforbob

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Re: UPDATED: Buying a steel plate tomarrow. **GOT THE PLATE**
« Reply #49 on: February 23, 2013, 09:01:30 PM »
Oven cleaner might have been an option. Hot tank cleaners at machine shops use a lye type solution. Same as oven cleaner.