My stripped Izula with a patina

[dd61999]

Thanks for everyones help on this board. I was able to strip the worn coating off my Izula and create a nice patina by letting it soak in apple vinegar overnight.

Here is a pic

 

[D1omedes]

What exactly is a "patina"?

 

[mean]

Patina
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A bronze coin of the Han Dynasty - circa 1st century BC with green patina.Patina (pronounced /ˈpætənə/ or /pəˈtiːnə/) is a film on the surface of bronze or similar metals (produced by oxidation over a long period); a sheen on wooden furniture produced by age, wear, and polishing; or any such acquired change of a surface through age and exposure. On metal, patina is a coating of various chemical compounds such as oxides or carbonates formed on the surface during exposure to the elements (weathering). Patina also refers to accumulated changes in surface texture and colour that result from normal use of an object such as a coin or a piece of furniture over time.[1]

 

[Josh K]

What exactly is a "patina"?

IIRC it's a layer of Iron II Oxide (which is a dark grey and more solid) instead of Iron III Oxide (which is rust colored and flakes ).

 

[Dorkhedeos]

IIRC it's a layer of Iron III Oxide (which is a dark grey and more solid) instead of Iron II Oxide (which is rust colored and flakes ).

I think its the other way around :thumbup:

 

[Josh K]

I think its the other way around :thumbup:

:foot: Yeah.

 

[TheQuest]

At any rate, someone explained that it's a way to get the good rust (grey) on the knife, to keep the bad rust (red) off.

You're forcing the metal to oxidize, thereby removing the amount of surface area that the red rust will have to attack. Just keep it oiled up every now and then and it should be GTG.

 

[D1omedes]

Wait a second - so there's good and bad rust?

 

[TheQuest]

Yep. The way I understand it, the gist of it is:

The grey (good) rust, is just a layer of oxidation on top of the blade, which prevents Red Rust.
The red (bad) rust, will continue eating it's way into the blade, leaving pits and generally chewing it up.

So, if you need a coating option, a patina is a cheap, easy way to extend the life of your blade. And you can force it to get an old school look.

Anyone else feel free to jump in.

Edit: You still need to keep it oiled up. But a forced patina can be an effective tool at holding rust at bay.

 

[knerd]

It looks nice.

 

[Dorkhedeos]

A patina on iron is similar to aluminum when it oxidizes. There is rust on the surface, but it doesnt go past there. Iron (II) oxide doesnt flake off like iron (III) oxide does.

BTW, thats a badass looking knife.

 

[El Gringo]

Is good...I like!:thumbup:

 

[derrickd803]

Looks good, I like the dark grey color it has now

 

[ron_m80]

I found on my Izula after a day of testing her in the kitchen chopping thai chilli and Jalapeno together make for a beautiful bronze patina. (sadly this was only verified on the minute portion of exposed edge on my new izula)

I am waiting for some more coating to wear off before plunging into more surface area being exposed and checked for bronzing.

Also i noticed the other day (and I swear i tried to wash the hell out of it) blood makes a stain (patina?) on polished carbon blades. My RMK drew blood while feeling the spine edge for sharpness, i ran off to put some gauze on the finger and forgot the knife on the shelf, i came back the next day to find the blood dried, after washing it off it left a stain, and even after trying 95% ethnol it remains. I think its blood patin'd? what says you gents, should i scrub harder or should i get use to the new look?

 

[D1omedes]

ron - I think we'll need pics to provide a useful answer.

 

[knerd]

I found on my Izula after a day of testing her in the kitchen chopping thai chilli and Jalapeno together make for a beautiful bronze patina. (sadly this was only verified on the minute portion of exposed edge on my new izula)

I am waiting for some more coating to wear off before plunging into more surface area being exposed and checked for bronzing.

Also i noticed the other day (and I swear i tried to wash the hell out of it) blood makes a stain (patina?) on polished carbon blades. My RMK drew blood while feeling the spine edge for sharpness, i ran off to put some gauze on the finger and forgot the knife on the shelf, i came back the next day to find the blood dried, after washing it off it left a stain, and even after trying 95% ethnol it remains. I think its blood patin'd? what says you gents, should i scrub harder or should i get use to the new look?

There's iron in blood, so it might speed up the process.

 

[Josh K]

I found on my Izula after a day of testing her in the kitchen chopping thai chilli and Jalapeno together make for a beautiful bronze patina. (sadly this was only verified on the minute portion of exposed edge on my new izula)

I am waiting for some more coating to wear off before plunging into more surface area being exposed and checked for bronzing.

Also i noticed the other day (and I swear i tried to wash the hell out of it) blood makes a stain (patina?) on polished carbon blades. My RMK drew blood while feeling the spine edge for sharpness, i ran off to put some gauze on the finger and forgot the knife on the shelf, i came back the next day to find the blood dried, after washing it off it left a stain, and even after trying 95% ethnol it remains. I think its blood patin'd? what says you gents, should i scrub harder or should i get use to the new look?

If you ever want to remove rust or a patina, try Barkeepers Friend. That stuff works like a magic charm, just sprinkle and rub with a sponge.

 

[ron_m80]

It would take me some time to get pics but i am willing to do it. I'll start a new post when i get them done.

I wanted to take this post back, because though on topic it wasn't a thread responce.

 

[Harp247]

Hey, I think it looks nice!

 

[nugent_crai]

looks awesome!