Hey Sal I’m glad you brought up the subject of DLC and corrosion resistance.
First off I must give you a disclosure, I live in Florida, I work as a carpenter. That means I work about half the time outside and I sweat like crazy! I sweat so much it looks like I peed my pants
I also feel like I have corrosive sweat.
Reading thru this whole thread Mattman said something that resonates a lot with my experience. I think I have noticed the “micro pores”. I have noticed that when I work outside all day and get really sweaty, my knife has tiny spots on it. It seems like it’s surface rust because I can easily rub it out with my fingers. I notice the red/orangy color on my hands when I do it. This leads me to believe that the sweat gets into the micro pores. I do believe that the coating does prevent corrosion to a certain degree. I regularly carry a uncoated M4 manix and a coated Manix. The uncoated one gets pretty rusty on the days I work outside. The coated one just gets spots. I have noticed that the spots do affect the finish on the coating. It goes from being dull to shiny, like when you cut high friction material that develops heat. I also notice the spots only develop on the presentation side which is the side that faces my body when it’s in my pocket.
If you ask me DLC coating definitely prevents corrosion to a certain degree. I feel it more or less enhances the corrosion resistance of the steel which it was applied to. The reason I say that is because of Vivi’s experience. It’s not the first time I have seen him express his experience. He said his knife is S30v. I think S30v has good corrosion resistance alone, add DLC and its pretty much rust proof for most situations.
My phone is acting up and won’t let me upload pics to a picture hosting site. The only way I can show you my knives is this link. Sorry if it’s not alllowed maybe someone can post the pics for me here.
https://bladeforums.com/media/8cc4803a- ... b421.3911/