Good evening from SW Michigan everyone!

I've shared photos on previous threads as well as the very popular "What did you make in the shop today?" regarding some Wrought Iron I have.

Cliff's Notes backstory-I have a bar of 1-1/2" WI that I picked up from the Nevada State Railroad Museum while on vacation (Shop Foreman pulled it for me from a scrap pile). I shared pics of a men's ring I made from it.  Frosty among others recommended etching it to see the grain when I posted.

I cut a piece of the same bar (that the ring was made of) for etching  testing.  I went up to 120 grit on my belt sander to clean it up.  Long story short, I was unsuccessful in etching.  I used warmed white vinegar, soaking from a couple hours, up to 24, with basically no etching.  I could see the inclusions a little better, but not like other etched WI I've seen pictures of.  I also tried Muratic Acid, with no luck as well.  Which leads to:

Decided tonight to do the bend test to further determine if my assumed WI was actually WI.  Cut the bar 3/4 through with my bandsaw, and hammered it over.  Thankfully, I saw grain, and the piece also "peeled" back as well.

Compared to other WI I've seen photos of, this grain (in my very greenhorn eyes) is super fine, not coarse like wagon wheel stock Ive seen on Ebay.

I've also included pics of my ring after multiple months of daily wearing.  The 1000-grit polish has worn off, but I like it better that way-the dark grey looks fantastic, and the inclusions in the metal give it character, to me.  The inside only has a light surface rusting, which rarely stains the finger.  The outside has never rusted.

Is this a very very refined grade of Wrought Iron?  Could that be why my attempts at etching haven't been successful? What else have I been doing incorrectly?

When you worked the piece, did you forge it at a welding temp or did you lathe/grind the ring out?

my first guess would be that you refined the piece your ring is made from

Hello Ridgeway-no forging, just drilled and dremel to fit my finger, and belt sander for the outer part.  Supply was already round, so just did stockk removal.  Here's a picture back when the ring was just made.

It does look like it has less grain and finer one, so the etching would be finer as well.

Heavy etching would likely be bad anyway as it could make it quite uncomfortable to wear as it's given sharp edges and sanding the inside smooth could make it loose. Something to consider.

You could always try a very quick dip in ferric chloride. But ultimately if the grains very fine, the finish will be too, cant change that. 

I have some wrought that i did a test peice with etching. I used muriatic acid first for 15 mins., no change. Then 1 hour, no change, long story short i left it in the acid for 2 days and barely got any noticeable change. I left it out in the air for a while, 3 or 4 days, and the change i noticed was that it rusted more in some places than others. My acid is old so it may not be up to strength but still should have etched i think. Why it did not i have no clue but i do know that my wrought was identified as triple refined. 

All that to say i do not know why it wont etch. 

Boy, I sure wish Thomas Powers was still with us as he was the resident expert on wrought iron grades. I think yours is triple refined and from the RR bar, it probably was used in a high stress application.

As Ridgeway Forge said if you are planning to forge it at some point, it needs to be at a high yellow heat. You will love it as it is like butter under the hammer.

https://www.iforgeiron.com/topic/21734-grades-of-wrought-iron/

I can’t control the wind. All I can do is adjust my sails. ~Semper Paratus~ USCG 1964-1970

Acid is way more effective if heated.

I always use hot HCL/muratic when trying to put metal into solution.

Always make sure that you are adding the acid to the water!!! Not the other way around. Exothermal reaction can be dangerous.

 

I Like Shiny Steel-I think I might do a test piece in Ferric chloride some time, been debating that.  Thank you.

Billybones-I appreciate you sharing that, now I know I'm not the only one!!  I felt I had read up enough, and something so apparently easy, wasn't as well for someone else.

Irondragon-thanks for sharing that thread and your thoughts.  I remember reading about different grades of WI refinement, it makes sense and your input feels correct.  I definitely plan to forge with it, just haven't found the ideal project just yet (only have so much of it and not going back to Nevada soon, dont want to waste it).

Florida Man-I did warm the white vinegar, but not the Muratic.  Will try that, as well as get some Ferric Chloride.

Sanding makes a good bit of difference too. Might try a rougher grit, 400 or 600 or so with a brief dip in the stronger acid, then a finer grit with no buffing and a longer soak overnight in a weaker acid like the instant coffee soak. It's not going to get the darker colors that you get with damascus, more of a grayish look... I imagine it may darken some over time from oxidation and from wearing it. Skin can be moderately acidic.

On 2/22/2026 at 2:04 PM, Irondragon Forge ClayWorks said:

I sure wish Thomas Powers was still with us

Same here. He knew not just wrought iron but metal in general. He is the one that turned me onto explosive welding.