Nitro-V surface corrosion

C

cornfarmer

Joined
Oct 16, 2021
Messages
5
What's the best way to clean up this Nitro-V without doing harm to the finish or metal? I am prepared to dismantle it.....

z10vPLSh.jpg


CAPsz3oh.jpg


0PU9SZTh.jpg
 
^ Good idea - I think what I may do first is see if the guy I bought it from will exchange it, or send me a refund. It was advertised as new and looked so in the pictures.
 
Thats some odd corrosion. I have one of these drop knives produced by Millet. No issues with corrosion and I carry it several times a week. I did sharpen it down a little and put a silicone ring on the middle stand off so the blade won't hit it.
 
try pencil eraser. ive cleaned many rusts spots off that way that weren't too bad...
 
JBC6650 said:
Thats some odd corrosion. I have one of these drop knives produced by Millet. No issues with corrosion and I carry it several times a week. I did sharpen it down a little and put a silicone ring on the middle stand off so the blade won't hit it.
Click to expand...

I keep looking at it and don't technically understand. There are also brown spots on the G10. Plus Nitr-V shouldn't do that.
 
BillZee said:
Never thought of that.......
Great tip !
Click to expand...
really nasty rust wont do anything too, but light spotting will remove and not too deep yet stuff will remove the top layers and then easy to clean off with flitz or whatever product one likes.
 
So I did some light testing with an eraser only. It sort of makes the dark spots 'fade' a bit - I didn't go crazy with a lot of 'vigor'. I'm not sure what else is going on here. I took off the clip and the weird dark brown spotting is on the underside of the clip, and has stained the G10 underneath.
 
Test #2 - rubbed with some Kroil and a '60s penny. Not that happy with the results, off to Millit it goes for a refresh.
 
Concluding the story. Sent it off to Millit to throw it in their tumbler, about a week later it came back and looks fantastic. Sacrificed the laser etch a bit, but you can still make it out, no big deal because I basically have only about $50 in this knife!

rx6ppRQh.jpg

txbk4wwh.jpg

hzltkpIh.jpg
 
The pics in the OP remind me a lot of the corrosion issues Kershaw had years ago with their bead-blasted stainless blades. Not so much about whether the steel is stainless or not, but more about the particular bead-blast finish creating microscopic voids or pits in the surface, which allows dirt & moisture to cling to the blade more tenaciously, creating new corrosion issues not usually seen in stainless steels.

Looking at the composition of Nitro-V steel, it compares pretty closely to some of the Sandvik stainless blades (like 14C28N) Kershaw originally had some trouble with. It was more an issue on Kershaw's blades in Sandvik 13C26 steel, with the 14C28N being an improvement over that, but still susceptible to some corrosion with that finish (see linked post below, from an older thread). And I'm not saying there's anything wrong with the steels themselves, as Sandvik made some very good stuff. But it's more about the nature of a bead-blast finish in particular on such steels. It's not limited to Kershaw, either - but unfortunately for them at the time, they got a lot more negative attention over those issues. Other bead-blasted blades from other mfrs. have also had such problems.

https://www.bladeforums.com/threads/if-only-kershaw-would-stop-bead-blasting.732848/post-8095221
 
Last edited:
Obsessed with Edges said:
The pics in the OP remind me a lot of the corrosion issues Kershaw had years ago with their bead-blasted stainless blades. Not so much about whether the steel is stainless or not, but more about the particular bead-blast finish creating microscopic voids or pits in the surface, which allows dirt & moisture to cling to the blade more tenaciously, creating corrosion issues otherwise not usually seen in stainless steel.

Looking at the composition of Nitro V steel, it compares pretty closely to some of the Sandvik stainless blades (like 14C28N) Kershaw originally had some trouble with. It was more an issue on Kershaw's blades in Sandvik 13C26 steel, with the 14C28N being an improvement over that, but still susceptible to some corrosion with that finish (see linked post below, from an older thread). And I'm not saying there's anything wrong with the steels themselves, as Sandvik made some very good stuff. But it's more about the nature of a bead-blast finish in particular on such steels. It's not limited to Kershaw, either - but unfortunately for them at the time, they got a lot more negative attention over those issues. Other bead-blasted blades from other mfrs. have also had such problems.

https://www.bladeforums.com/threads/if-only-kershaw-would-stop-bead-blasting.732848/post-8095221
Click to expand...

Clever stuff, nice post.

I know that it's been utterly impossible to get my satin finished AEBL blades to rust, so definitely a surprise to see it's cousin nitro-v incur spots like that. I believe you're spot on about the bead blasted finish and the microscopic voids being the catalyst.
 
You must log in or register to reply here.
Back
Top