Help identify this oxide on 17-4 stainless steel

So recently I was bluing some carbon steel parts and decided to blue a 17-4 stainless steel part as well. I used liquid salt Peter 99.98 percent purity.
It developed this light but kinda dark golden/bronze oxide finish and now after about a week or so it's developing this brown tarnish.
What is this?
Is it damaging like normal rust?

Bump.

Bump.

You faggots are worthless.

Tl;Dr, yes it is rusting. Long version: 17-4 stainless has high amounts of chromium, nickel, and copper, all which completely change any oxidation profile you would see in a non-standard carbon steel, which is what makes it stainless.

www.wessonforum.com/s-w-revolvers-1980-present/224335-can-you-blue-stainless.html

But is it harmful rust? And how is it rusting? It's 17-4 ss? This would just supposed to add a thin oxide film to help prevent corrosion even more.

why dont you just google this shit? you'd actually get an answer

I have and can't find anything.
This is the science board. I figure at least one of you is a chemist but instead everyone is just a faggot sperging abou about MUH ELON MUSK SPACEX when chemical rockets are shit and when nuclear slat rockets are better and a nuclear Verne gun is better for getting things into orbit.
/k/ would be more helpfu

Same fag