As most know that when working with stainless steel you must be very carefull about what comes in contact with the stainless. Wire brushes are probly the biggest example of this.
The Movie Silverado: Image of the Kevin Costner's character, condemned to hang, in the jail cell when Robin Williams' character has just been also locked up and turns to the bars saying "You are making a big mistake." And Costner slaps his knee and exclaims: "THAT'S WHAT I TOLD 'EM~!!"
It's my favorite line of the movie.
It goes for every thing. If a carbon source gets on the surface and the stainless gets to its magic temp of 800-1600 degrees, then it will become what is known as sensitized.
Id.
The only real fix is to do a solution heat treat on the material to get it back to where it once was.
Which solution is comprised of annealing the metal.
I've always done this by heating it up again and cooling it very slowly.
I don't know what the temp', soak, and ramp down are.
Lots of guys I've known just use some abrasive in the discoloration to get rid of it.
So, we must think about all things that come in contact with the stainless. Drilling we are pretty much screwed on.
Well not entirely screwed, just mostly screwed (forgive me Miracle Max). You can always take a small grinder or a couple sheets of abrasive to the holes and clean them up.
Every thing else we can controll. When hammering on stainless it is best to use a chunk of stainless. Iron will embed in the surface and that iron will rust.
apply quote from Costner.
Yes I know I typed "weldor". It is a clairification in text. Here is the first bit from wikipedia.
A welder (also weldor, which term distinguishes the tradesman from the equipment used to make welds) is a tradesman who specialises in welding materials together.
And tradesman ( or person for the PC gang) is the dead on exact term.
I am persnickety about the use of words like trade, vocation, avocation and profession. I sure as hell don't want some professional monkeying around with my car's front end and then sending me out on the highway at 60 MPH. I want a tradesman~!! Preferably a Journeyman.
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