danger Posted May 19, 2015 Share Posted May 19, 2015 Right so apparently its possible to determine serial numbers that have been ground off firearms through metalurgical analysis OR SOME SUCH Does anybody have any clues as to how this is performed? The reason I ask is I have a friend with a 56 chevy who's had his chassis blasted and the chassis number for re-registering it is completely unreadable (The body tag is missing) Any help would be appreciated thanks Quote Link to comment Share on other sites More sharing options...
Popular Post xsspeed Posted May 19, 2015 Popular Post Share Posted May 19, 2015 If you take a photo and zoom in on potatoshop and say enhance a few times it works 12 Quote Link to comment Share on other sites More sharing options...
kyteler Posted May 19, 2015 Share Posted May 19, 2015 I believe they use some paper and charcoal and do a rubbing. Quote Link to comment Share on other sites More sharing options...
danger Posted May 19, 2015 Author Share Posted May 19, 2015 Yeah I was gonna try doing a rubbing but keen for a more jazzier idea Quote Link to comment Share on other sites More sharing options...
Seedy Al Posted May 19, 2015 Share Posted May 19, 2015 if only you could some how have the who playing over this thread. as for this, yeah a rubbing would be a good attempt! I don't know if using the magnetic stuff they use for crack testing with a black light might work? 2 Quote Link to comment Share on other sites More sharing options...
Hemi Posted May 19, 2015 Share Posted May 19, 2015 Well it seems this issue has been , ironed out. YEAAAAHHHHH 7 Quote Link to comment Share on other sites More sharing options...
kyteler Posted May 19, 2015 Share Posted May 19, 2015 Serious though. Read this one: http://www.practicalmachinist.com/vb/general/i-need-some-ideas-making-s-n-readable-176202/ Unless you can get your hands on one of these: http://www.leelofland.com/wordpress/restoring-serial-numbers-on-firearms-and-other-objects/ Or read this: http://scholarlycommons.law.northwestern.edu/cgi/viewcontent.cgi?article=4630&context=jclc 1 Quote Link to comment Share on other sites More sharing options...
danger Posted May 19, 2015 Author Share Posted May 19, 2015 Thanks Michael, I'll share that information. Hopefully, HIS NUMBER'S UP. PS 5 Quote Link to comment Share on other sites More sharing options...
kyteler Posted May 19, 2015 Share Posted May 19, 2015 Holy shit. Thanks Michael, I'll share that information. Hopefully, HIS NUMBER'S UP. That was awesome. Quote Link to comment Share on other sites More sharing options...
Ghostchips Posted May 19, 2015 Share Posted May 19, 2015 Acid etching of some kind may be a last resort, i heard it works on engine blocks but you'd have to get a forensic person onto it, they'd probably be good at it. 1 Quote Link to comment Share on other sites More sharing options...
danger Posted May 19, 2015 Author Share Posted May 19, 2015 Acid etching of some kind may be a last resort, i heard it works on engine blocks but you'd have to get a forensic person onto it, they'd probably be good at it. 1 Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 19, 2015 Share Posted May 19, 2015 Shine a black light onto the surface to find any semen. That's all I know. 3 Quote Link to comment Share on other sites More sharing options...
Popular Post The Bronze Posted May 19, 2015 Popular Post Share Posted May 19, 2015 not doing the taste test anymore? 11 Quote Link to comment Share on other sites More sharing options...
BDA780 Posted May 19, 2015 Share Posted May 19, 2015 Acid etching of some kind may be a last resort, i heard it works on engine blocks but you'd have to get a forensic person onto it, they'd probably be good at it. This is what I'd expect. Most links just say an acid etch with a voltage applied. As it's mild steel etchants such as Ferric Chlorride or Nitric come to mind. The article here - http://www.sciencedirect.com/science/article/pii/S2090536X12000809, suggested the following etchant: Ferric chloride 25 g, conc. HCl 25 ml, distilled water 100 ml Continuous application for 20-40min Alternatively if it can be removed you could used EBSD with a Scanning Electron Microscope - http://phys.org/news/2015-02-crystal-pattern-recover-obliterated-serial.html 2 Quote Link to comment Share on other sites More sharing options...
danger Posted May 19, 2015 Author Share Posted May 19, 2015 I haven't got a scanning electron microscope right now but ta. 9 Quote Link to comment Share on other sites More sharing options...
BDA780 Posted May 19, 2015 Share Posted May 19, 2015 Fry's reagent is noted as being a popular option. From: Restoration of Vehicle Identification Numbers - R. Kuppuswamy, M. Senthilkumar http://search.proquest.com/docview/194803640?pq-origsite=gscholar 4 Quote Link to comment Share on other sites More sharing options...
HighLUX Posted May 19, 2015 Share Posted May 19, 2015 This thread is all sorts of awesome Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted May 19, 2015 Share Posted May 19, 2015 So does the acid somehow make the metals grain structure visible? I'm guessing its affected deeply by the stamping? Or am I way off track 1 Quote Link to comment Share on other sites More sharing options...
ajg193 Posted May 19, 2015 Share Posted May 19, 2015 I'd say the stamping deforms the grains enough that the acid will be able to etch more easily around those boundaries than the boundaries of unaffected grains Quote Link to comment Share on other sites More sharing options...
danger Posted May 19, 2015 Author Share Posted May 19, 2015 Sweet I'll print that out and have someone brew me up some essence of Fry Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.