Restoration with vinegar.

J

Jorarz

Joined
Feb 11, 2021
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13
Hey everyone! I need some help with my knives restoration. I put my knives on vinegar to remove rust of them and I left them 24 hs on the vinegar. Last night I quit them and with a brush I removed all the black layer that the vinegar left on the blade. At that point seems like the rust was removed satisfactory. But this morning I woke up and went to see my knives and I found on them a new layer of orange rust. Affortunally with a simple brush and water this new rust I removed easily but I'm affraid this can happen again because in a few minutes later I realiezed this was happening again. Someone know why is this happening?
Actually my plan was not end here. The next step on my plan was to sand them and then use polishing paste but I didn't found time to do that yet. The thing is that I was happy with the result of the vinegar and I was hopping to procede with the sandpaper but now this new layer rust it puzzled me
 
When using an acid (or acidic substance) some recommend following with a neutralizing bath to halt the process. I believe I've seen reference to baking soda for this purpose.
Probably worth an oil coating after you dry them, too
 
I restore knives professionally.
The only thing I use vinegar for is occasionally eating the decarb and scale off of heat treated steel.
 
Do it again, but as soon as you pull that knife out of the vinegar, slap a mix of baking soda and water ( make a paste) on the blade for about 10 minutes. Then take it off. I did this to an old katana blade from Japan, and it actually worked great
 
Neutralizing the vinegar is not necessary if you rinse it properly. Ammonia in water works better than baking soda if you must try to neutralize.
The rust is coming from raw steel reacting to moisture in the air. WD 40 will stop that.
 
I
Bill DeShivs said:
Neutralizing the vinegar is not necessary if you rinse it properly. Ammonia in water works better than baking soda if you must try to neutralize.
The rust is coming from raw steel reacting to moisture in the air. WD 40 will stop that.
Click to expand...
I dig that. So if I did that to a blade, wiped it dry, and sprayed WD right after, and rubbed it on the steel, it should be ok?
 
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