Matt, I don't mean to disagree with your choice. Since I don't know what the parts look like size-wise so it might be just what you need. I tried a shallow pan like that and it would not balance well on the stove burner, and it wasn't deep enough to suspend the parts I wanted to parkerize. I found that a standard 2qt and 4qt fit my needs, and if I ever need a larger pot I would probably get a large pasta cooking pot like "Honey" uses. I think it almost a foot tall. You also need the ability to pour off the solution into a plastic seal able container for storage when the solution cools. A flat low pan might be a bit tricky to handle. Just some things to think about before you commit to a purchase. Mine came from a garage sale, ugly as sin and all beat up, but stainless steel and 50 cents apiece!
-MB