SilverBolt Posted October 6, 2014 Share Posted October 6, 2014 It's not that it is a "cheap" grade of stainless, it's that they are likely formed from 400 series stainless which contains a small amount of carbon. Clean them up and use them. If you plan to store them use a light coat of oil. Link to comment Share on other sites More sharing options...
cecil Posted October 8, 2014 Share Posted October 8, 2014 I beg to differ referring to "any stainless steel rusts"... I have a stainless propeller on my 70HP Yamaha outboard its 8 years old.. I regularly run it in SALT WATER... Gulf of Mexico... and it does not have O N E speck of rust on it anywhere... so the statement that all stainless rusts.. is INCORRECT !!!! Link to comment Share on other sites More sharing options...
MikeRush Posted October 8, 2014 Share Posted October 8, 2014 STI uses 410 stainless for mag tubes, which is not a very corrosion resistant metal. It is hard, responds well to heat treating and is wear resistant. It is magnetic unlike some types of stainless which is why it works on magnetic mag pouches. Mine were fine in Southern California but rusted in a matter of hours at the Oilfield Classic in Texas. I just polish them up as a matter of maintenance now. Ive seen the new nitrided mags STI is selling, I guess they figure 410 can always be coated with something. TiN, nitride, maybe hard chrome? Not sure on that one. I'll have to look into it. Link to comment Share on other sites More sharing options...
Aglifter Posted October 8, 2014 Share Posted October 8, 2014 (edited) Odds are, they need to be pacified - I can try it w my rusty mags, but I haven't had an issue once I used Boeshield. Not sure if trying to passive them will help w a magnetic grade if stainless. Edited October 8, 2014 by Aglifter Link to comment Share on other sites More sharing options...
Parallax3D Posted October 8, 2014 Share Posted October 8, 2014 cheap stainless steel -- RUSTS .. Any stainless can rust, lower grades are more prone to rust. Stainless is rust resistant, not proof. In higher humidity enviornments or acidic enviornments it really needs a coating to prevent rust. Actually, the chromium that is added to steel to MAKE it stainless creates a sacrifical layer that oxidizes, instead of the steel. The nickel in stainless steel helps hold this scarificial layer of chromium in place. The AMMOUNT of chromium and nickel in stainless will determine how easily the steel rusts. The higher the percentages, the more rust resistant. Link to comment Share on other sites More sharing options...
Bob DuBois Posted October 8, 2014 Share Posted October 8, 2014 Live in the south mine rust also. After polishing wipe them down with Mink Oil. Seems to help better than anything I've tried also rub the pistols down about once a year. By mine at Red Wing Shoes but I'm sure any brand will work. Did a lot better than car wax. Link to comment Share on other sites More sharing options...
cwhoward1 Posted November 9, 2014 Share Posted November 9, 2014 Found some on a few of mine. Funny that not all of them did though Given your STI magazines are less than 6 months old, I would call STI - get an RMA and have them replaced. That should not happen. You can also get your new magazines coated by robarguns.com with NP3 or other coatings. Then they are guaranteed for life. I just visited their facility a few weeks ago and learned about the magazine treatment in addition to the complete gun. I have one NP3 coated gun and I am having a second handgun also treated with their NP3 product. Link to comment Share on other sites More sharing options...
yellow Posted November 11, 2014 Share Posted November 11, 2014 My gunsmith is building a custom 2011 for me right now. My mags are TiN coated. We'll see how it works out.. Link to comment Share on other sites More sharing options...
ronhonda Posted November 15, 2014 Share Posted November 15, 2014 I use NOXON twice a year to clean my mags. Cleans up the ugly stuff nicely. http://www.amazon.com/Noxon-Metal-Polish-Cleaner-Bottle/dp/B000QOIEVC Link to comment Share on other sites More sharing options...
KustomHolsters Posted November 16, 2014 Share Posted November 16, 2014 Mine rust when my sweaty hand touch them. In a matter of 1-2 days. Rem oil and steel wool take it if. Link to comment Share on other sites More sharing options...
Shadowrider Posted November 16, 2014 Share Posted November 16, 2014 If they are in fact made out of 410 stainless they will likely rust. 410 only has 11.5% chromium, you need to get to 15% or higher for better corrosion resistance. Passivation may indeed help and you may find someone local that can do it. It's just an acid (usually nitric) dip but make damn sure they are in fact stainless, you really won't want to see them if they are a plain carbon steel after coming out of the acid bath. Look for chemical finishing/plating shops that cater to aerospace industry. If you use plain steel wool on them you are just applying some iron on the surface which can make them rust if you don't keep them lubed with something. I just season mine using froglube paste and wipe them clean after cooling. Works pretty good for me. Link to comment Share on other sites More sharing options...
turkeypoker Posted November 17, 2014 Share Posted November 17, 2014 Mine rust as well. You think 600 grit sandpaper will hurt them? Link to comment Share on other sites More sharing options...
jetjocky Posted November 17, 2014 Share Posted November 17, 2014 I use flitz to polish inside and out. Hornady one shot dry lube to prevent rust and help drop free. Link to comment Share on other sites More sharing options...
dirty whiteboy Posted November 17, 2014 Share Posted November 17, 2014 Mine rust when my sweaty hand touch them. In a matter of 1-2 days. Rem oil and steel wool take it if. Same here. Link to comment Share on other sites More sharing options...
outerlimits Posted November 17, 2014 Share Posted November 17, 2014 Mine rust as well. You think 600 grit sandpaper will hurt them? Won't hurt at all. When I polished all mine , I went from 300, 600, 1000, 1200, 1500 and 2000. Like a mirror now. Link to comment Share on other sites More sharing options...
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