Coating?

Holt

Holt

Joined
Mar 11, 2014
Messages
43
Do any of you guys know what type of coating this is on the handles and on the blade? This is a Shirogorov Neon. I know that it is not conventional anodizing. It might be some type of PVD, but I've never seen this type of coating on anything but on Shiro's. If you have any ideas on how it was done, I'd love to know.

Thanks,
Joe


Shirogorov-Neon-rear.jpg shirogorov-neon-blade.jpg
 
Blade looks like a tumbled finish with some sort of acid etch. The Ti handle looks to be the same. I think etching titanium requires the use of hydrofluoric acid (which is nasty stuff), but maybe something else will do it.
 
Ti will etch in a hot oxalic acid solution. Applying 12 volts DC will speed it up. + to anode, - to Ti piece.
 
Hot oxalic acid is still pretty nasty stuff. Nothing that etches Titanium is safe. Proper equipment, safety gear, and procedures are absolutely necessary.

Many of the etching formulae sound safe, but are stiil very dangerous. People etch in boiling H2SO4, H2O and NaHF2 ( or F2H5N), etc.

Thinks like H2O and NaHF2/F2H5N create hydrofouric acid. If you don't understand what is hapening when you mix up chemicals you can get hurt bad ... or killed. I deliberately used the formula name because there are people who will try stupid stuff if you use the common names. This is one reason I don't like You-Tube.
 
My rule tends to be that if it is a strong acid or base, you gotta know the chemistry of what is happening before you try it. HCL is on the safe end of strong acids, and can still blind you quite easily. Sulphuric and hydrofluoric ratchet it up a lot. HF is particularly bad because it will simultaneously burn with minimal exposure and is highly toxic and tissue permeable. AFAIK, oxalic acid has far lower toxicity, but yeah, hot acid is always something to take extreme care with.
 
Stacy E. Apelt - Bladesmith Stacy E. Apelt - Bladesmith isn't stupid people doing what they saw on youtube just the evolution of Darwinism?

But to be serious you need to be careful with any acid and increasingly so the more concentrated it is.

HCL is only on the safe side in the weaker concentrations industrial concentrations are nasty as well.
 
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