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1. Re: Nitrogen Embrittlement (acid manifold porting) (score: 1): Author: "Tom Witt" <wittsend@jps.net>; Date: Fri, 22 Oct 2004 09:47:37 -0700; Thanks for everyone's input. I was aware of the Extrude Hone process and unfortunately it's cost. I had also heard that there were "old timers" who ran a pumped slurry into manifolds as well to enlar; /html/tigers/2004-10/msg00207.html (8,137 bytes)
2. RE: Nitrogen Embrittlement (acid manifold porting) (score: 1): Author: "Theo Smit" <theo.smit@dynastream.com>; Date: Fri, 22 Oct 2004 11:05:00 -0600; Hi Tom, Based on this information, I'd say you're probably okay. http://www.corrosion-doctors.org/Forms/embrittlement.htm Best regards, Theo; /html/tigers/2004-10/msg00208.html (7,377 bytes)
3. Re: Nitrogen Embrittlement (acid manifold porting) (score: 1): Author: Steve Laifman <SLaifman@socal.rr.com>; Date: Fri, 22 Oct 2004 12:27:15 -0700; Hydrogen embrittlement is a well known phenomena resulting from operations like the acid in an chrome electroplate penetrating into a wire wheel spoke and degrading it's tensile strength. Many 50's; /html/tigers/2004-10/msg00210.html (10,272 bytes)
4. RE: Nitrogen Embrittlement (acid manifold porting) (score: 1): Author: Dave Munroe <dave@munroe.ca>; Date: Fri, 22 Oct 2004 23:26:40 -0300; As a long time bike restorer, I confess to compete ignorance of the trick to bake chrome spokes to remove the hydrogen and prevent embrittlement. In fact, it is well known in bike wheel building cir; /html/tigers/2004-10/msg00214.html (8,132 bytes)
5. Re: Nitrogen Embrittlement (acid manifold porting) (score: 1): Author: "Tom Witt" <wittsend@jps.net>; Date: Fri, 22 Oct 2004 21:28:07 -0700; Well......, I would assume that baking would include the heat generated by the running the engine. I also have a convection oven in the garage that we use when I hanker for a baked potato, but it's 9; /html/tigers/2004-10/msg00217.html (7,372 bytes)
6. RE: Nitrogen Embrittlement (acid manifold porting) (score: 1): Author: bmelusky@netscape.net; Date: Sat, 23 Oct 2004 10:24:47 -0400; Generally, the hydrogen embrittlement bake is done at about 400F for 3 hours and it MUST be done within 24 hours of the plating. Harder material is more susceptible and I while I have not checked the; /html/tigers/2004-10/msg00219.html (9,778 bytes)

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