View Full Version : Weird chemical reaction with 5160

Gabe Newell
08-11-2003, 07:25 PM
I'm curious if this is as odd as I think it is. I was eating at a local steak restaurant. I was cutting my steak with a mirror-polished blade of 5160. The steak was heavily salted and rare (lots of meat juice).

After cutting steak for 10 minutes, I wiped it with my napkin and stuck it in cold water. Instantly the surface of the blade was tarnished - almost like heat coloring. The surface turned blue and brown, and there was a very distinct edge along the blade where it had contacted the steak.

I figured it was just some sort of goo, and tried wiping it off with a Tuff-Cloth, but no go. I had to use a chamois and Flitz to polish it before it would come off.

This seems like a peculiar reaction, and, although I wasn't paying attention, it didn't seem to happen until I stuck it in the ice water.

Any thoughts?

08-11-2003, 11:52 PM
Not sure, just a guess. Any marinade on the steak? Sounds like vinagar patena. Happens to me all the time. I patena them evenly first. They look better to me like that. It should buff right off tho.

Chuck Burrows
08-12-2003, 12:39 AM
Blood will cause that kind of discoloration - not sure why the cold water set off the reaction.
In fact Dan Gray aka "graymaker" uses blood as one of the things to "age" his blades. Might give him a shout and see if he can give you some insight.