Hey,
I was fooling around with a new D2 blade I made. I was trying to rust blue it so I put it in a diluted Sulfamic Acid solution to see if I could get it to rust more quickly (Sulfamic was the only acid I had around my shop and I thought it might work in a similarly to Muriatic acid). Much to my amazement the blade turned black. I left it in the solution for 24 hours and now it has what appears to be a permanent dark black patina. I am curious if anyone knows what the deal is. Is this black coating durable? It doesn't seem to come off with steel wool. Also, does anyone think the coating will help prevent rust in the same way the bluing would have? I have read a bit about "Black Rust" and am curious if this is what happened to it. I boiled it like in the rust bluing process to try and stop the chemical reaction but I am not sure if the boiling will work on this coating like it would deactivate the rust process. I have heard windex will stop the chemical reaction as well as baking soda.
Does anyone have any experience with this? The blade looks great just curious about the details and what will happen later. Anyway, cool experiment.
I was fooling around with a new D2 blade I made. I was trying to rust blue it so I put it in a diluted Sulfamic Acid solution to see if I could get it to rust more quickly (Sulfamic was the only acid I had around my shop and I thought it might work in a similarly to Muriatic acid). Much to my amazement the blade turned black. I left it in the solution for 24 hours and now it has what appears to be a permanent dark black patina. I am curious if anyone knows what the deal is. Is this black coating durable? It doesn't seem to come off with steel wool. Also, does anyone think the coating will help prevent rust in the same way the bluing would have? I have read a bit about "Black Rust" and am curious if this is what happened to it. I boiled it like in the rust bluing process to try and stop the chemical reaction but I am not sure if the boiling will work on this coating like it would deactivate the rust process. I have heard windex will stop the chemical reaction as well as baking soda.
Does anyone have any experience with this? The blade looks great just curious about the details and what will happen later. Anyway, cool experiment.