TriX wrote:
I consult for a company that produces precision parts for the aerospace/defense industry, so we deal with plating and finishes regularly, but almost always on aluminum and stainless. My only experience with parkerizing over the years has been on socket head cap screws that are routinely parkerized, and I was not impressed with their rust resistance. Electrolys Nickel, on the other hand, is an excellent, very hard finish, and along with hard anodizing, is our preferred finish for aluminum. Wish I knew more about regular steel finishes, but almost all my design work has been with Aluminum or stainless, except for hardware. I like Cad plating and have no use for clear chromate.
I consult for a company that produces precision pa... (
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Parkerizing is okay for firearms and tools that are used frequently and oiled, but it is a butt ugly finish, but like gun bluing if not maintained will rust in a heart beat.The most durable finish I have found is browning, its a controlled rust process using a Nitric acid, sulfuric acid and iron mixture, the problem I had 50 yrs ago was obtaining the nitric acid. The 100 yr. old directions said to combine the two acids and add the iron in a well ventilated area Lol that was an understatement, I did do it outdoors , and had a red mushroom cloud about 3 ft. in dia. and 30ft high. The finish is fantastic!! when my guns were stolen in 1995 the thieves dumped the no value guns in the woods, the Browned Flintlock rifle was the only one that didn't rust. They were recovered about a 1/2 mile from my home two weeks after the theft. Only one of the high dollar guns was recovered and it took three years for me to get it back. They did catch the thieves one got 7 yrs jail time one got 5yrs probation, I got screwed!!.