Thread: Acid treatment for deep pits?

I have a razor with several deep pits on the face of the blade, just below the spine.
I can get a dental pick into them, so I think that they are too deep to sand out,
without creating some pretty deep hollows.

I was wondering....Would an automotive "rust remover", which I believe is a mild
phosphoric acid, stop the progress of the pitting? I realize that the resulting oxide
would be black (ugly), but would it save the razor from further damage?

I've already gone over the pitted area several times with MAAS on a toothbrush,
with some removal of the black pitting, but not all. I thought I'd try that before
resorting to something more drastic.

Any comments please?

ps: I neglected to mention that the razor came to me already "repaired/restored",
so there's no etching or wash left on the blade worth saving.

A picture is worth a thousand words! Is it a full hollow or more of a thicker grind?

Originally Posted by AirColorado

A picture is worth a thousand words! Is it a full hollow or more of a thicker grind?

Without a macro lens, I can't get close enough to show any detail. The razor is about half hollow, and the pitting is
fairly close to the spine.

Sorry about that.

I have had good luck with Evaporust, available localy at Harbor Freight and reusable, so you can do a lot of razors with a gallon, 20-30 bucks.

I cut off as much rust as possible with a razor blade and soak overnight. Rinse in hot water and dry with a heat gun or hair dryer.

Works well when you just want to stop further rusting and don’t have time to get to them for a while or where you do not intend or will not be able to remove all the pitting.

Works great on rusted nuts and bolts that will be painted for auto restorations.

I have used a phosphoric acid based product with a SS Dremel brush to clean out pits.

Jonathan

A half hour soak in distilled vinegar has worked for me. BUT..it needs to be neutralized with a strong soap like Mr Clean etc. after the soak.
I use a toothbrush wire brush from HF or similar to get the remains out of the pits when using the soap.
~Richard