M&P and rust - Page 1

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[ARCHIVED THREAD] - M&P and rust

Posted: 2/6/2016 9:44:34 PM EDT

I've been having a problem with surface rust on the slide serrations of my 9c.

About 6 weeks ago I helped with a novice handgun class and this pistol was loaned out. At the end of the day I broke it down, lightly cleaned it, reassembled, and put it back in the safe. Last week I noticed a fair amount of surface rust on the wavy slide serrations. Perhaps the student that used it had overly salty sweaty hands? I got after it with 0000 steel wool and a dental pick to get in the grooves. I did a thorough job, but yesterday noticed it was back. I scrubbed it again and right now it's got a good coating of WD40 on it.

Any thoughts? I'm disappointed in the gun's finish. A loaner Glock, used at the same class, sits right next to it in the safe and has no trouble.

Posted: 2/6/2016 10:18:16 PM EDT

[#1]

There was a batch of pistols with this problem. Smith and Wesson will take care of it if you contact them.

Posted: 2/6/2016 10:55:50 PM EDT

[#2]

My old one was bad.

Posted: 3/11/2016 8:30:20 AM EDT

[#3]

hmmm, how can this be, I thought the slides were stainless and that shouldn't rust correct?

I bet if you call them they will refinish the slide. Hope they fix it for you.

Posted: 3/11/2016 8:57:28 AM EDT

[#4]

stainless will stain.
stainless will rust.

stainless IS NOT STAINLESS... (it's merely less apt to stain or rust due to the lower iron content of the steel - I believe they use chromium or some other metal in its stead).

if you want something to NOT rust, then dont put it in a safe with little air movement or low oxygen content. (low O2 and lack of air movement promote rusting)

Posted: 3/11/2016 7:01:59 PM EDT

[#5]

Quote History

Quoted:
stainless will stain.
stainless will rust.

stainless IS NOT STAINLESS... (it's merely less apt to stain or rust due to the lower iron content of the steel - I believe they use chromium or some other metal in its stead).

if you want something to NOT rust, then dont put it in a safe with little air movement or low oxygen content. (low O2 and lack of air movement promote rusting)

View Quote

Oxygen is REQUIRED for rusting to occur!

Typically Stainless used in firearms is 400 series, and yes 400 series will rust. 300 series is MUCH more resistant to rust but isn't suitable for firearms.

What would concern me is I thought that M&P slides were melonited. Anything melonited should be damn near rust PROOF!

[ARCHIVED THREAD] - M&P and rust

Handguns » Smith & Wesson

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