Re: [CR]A few words about chrome plating


Example: Events:Cirque du Cyclisme:2004

Date: Thu, 17 May 2001 07:43:17 -0700
From: Brian Baylis <rocklube@adnc.com>
To: "Moos, Jerry" <jmoos@urc.com>
Cc: classicrendezvous@bikelist.org
Subject: Re: [CR]A few words about chrome plating
References: <ABC4A5183996D411BF92000629EEABAD3662B1@mail-server.urc.com>


Jerry,

The reason for chrome over nickel is because nickel will tarnish when exposed to the elements, chrome does not.

Brian Baylis
>
> Brian, while you're educating us, what is the value of chroming a frame,
> rather than simply nickel plating it and being done with it? How can one
> tell the difference between a nickel plated frame and a chromed one?
>
> Regards,
>
> Jerry Moos
>
> -----Original Message-----
> From: Brian Baylis [mailto:rocklube@adnc.com]
> Sent: Thursday, May 17, 2001 2:30 AM
> To: Diane Feldman
> Cc: classicrendezvous@bikelist.org
> Subject: Re: [CR]A few words about chrome plating
>
> Dave,
>
> All chrome has nickel under it. The electroplating process by nature
> requires various "steps" that electrons can jump from one element to the
> next. The gap has to be small enough for the process to work. Originally
> copper was required for the nickel to stick to. Then the chrome could
> stick to the nickel. What happened was that through chemistry the
> industry formulated a nickel compound that would bond to steel, thus
> eliminating the neccessity for the copper step. Most of what we call
> chrome plating is nickel; the chrome itself is only microns thick since
> at that point the process is about 3% effecient as compared to about (as
> I sort of remember) nickel which is around 30% and copper which is very
> effecient at around 70% or so as I recall. The nickel is the primary
> source of durability and gloss (or depth) of the chrome. I think that
> covers it for the basics.
>
> Brian Baylis
> La Mesa, CA
> >
> > Ah, yeah I guess I was asking if there was any benefit in a nickel and/or
> a
> > copper layer under the chrome in terms of durability, or corrosion
> > resistance, or lessening any weakening of the steel.
> >
> > DF
> > ----- Original Message -----
> > From: "Brian Baylis" <rocklube@adnc.com>
> > To: "Diane Feldman" <feldmanbike@home.com>
> > Cc: <classicrendezvous@bikelist.org>
> > Sent: Wednesday, May 16, 2001 8:03 PM
> > Subject: Re: [CR]A few words about chrome plating
> >
> > > Dave, I'm not sure what you're asking. Please clarify.
> > >
> > > Brian Baylis
> > > >
> > > > What about a nickel layer under the chrome? I remember Ten Speed
> Drive
> > > > making a big deal about the multi-layer copper, nickel, and chrome on
> > their
> > > > frames in the 1980;'s. At least on the top of the line Ciocc and
> > Tomasso
> > > > frames, the plating looked great, but how did it last and did the
> nickel
> > > > have anything to do with it?
> > > >
> > > > David Feldman
> > > > ----- Original Message -----
> > > > From: "Brian Baylis" <rocklube@adnc.com>
> > > > To: <classicrendezvous@bikelist.org>
> > > > Sent: Wednesday, May 16, 2001 12:12 AM
> > > > Subject: [CR]A few words about chrome plating
> > > >
> > > > > Listmembers,
> > > > >
> > > > > There are a few key points regarding chrome plating that weren't
> > > > > completely addressed, which I'd like to illuminate since the topic
> > came
> > > > > up.
> > > > >
> > > > > First, it is of prime importance to have a very good relationship
> with
> > > > > ones' plater if one expects excellent results while avoiding the
> > > > > pitfalls that can (but do not neccessarily have to) accompany a
> chrome
> > > > > plating job. The problem of drainage is easily solved by one of two
> > > > > methods. The best one is not to have any holes in the seat stays or
> > fork
> > > > > blades in the first place. The only safe way to accomplish this is
> > > > > during the framebuilding process; filling the one vent hole in the
> > fork
> > > > > or stay just after brazing the final joint that encloses the tube
> > while
> > > > > it is still hot. Trying to fill a hole afterwards is risky and is a
> > > > > pretty good way to insure that a small pinhole will allow plating
> > > > > solution to enter and have no way to escape. So for resorations it
> is
> > > > > best to make sure each stay and blade hace two holes at opposite
> ends
> > > > > that are about 3/32" in diameter. Any GOOD plater can work with that
> > and
> > > > > give the owner of the frame the ability to introduce a rust
> inhibitor
> > > > > AFTER the paint job is applied.
> > > > >
> > > > > Regarding polishing. Yes it is dangerous, providing the plater
> (which
> > > > > includes all but the one I use) goes about it with the polishing
> > lathes
> > > > > that Jim described. The exceptional plater will have developed a
> > > > > "secret" method to accomplish this task without risk to frame or
> human
> > > > > body. As luck would have it, the polisher at my plater is a good
> > friend
> > > > > of mine (we have an interest in drums and drumming in common) and
> has
> > > > > passed this trick on to me; which I can use myself if I'm so
> inclined
> > > > > (which usually I'm not). But, it is quite safe and only requires
> some
> > > > > time and effort to accomplish, along with a few special tools and
> > > > > whatnot.
> > > > >
> > > > > Only a really careless or inexperienced plater can accomplish
> hydrogen
> > > > > embrittlement on a frame. It's not easy to do. As far as I know,
> only
> > > > > about a half an hour at 300 or so degrees is required to disipate
> the
> > > > > effect. Maybe industrial (or "hard" chrome) requires 12 to 24 hours
> at
> > > > > temp., but not decorative chrome like we use. Modern nickel
> > formulations
> > > > > take the place of the old "triple chrome" process and work perfectly
> > > > > well. Like Jim said, copper is for heavily pitted parts these days.
> If
> > a
> > > > > frame is that bad off, it's probably best not to chrome (or maybe
> even
> > > > > ride) it at that point.
> > > > >
> > > > > The chrome I get from my plater is mirrorlike; it's all in the
> > polishing
> > > > > and keeping clean tanks.
> > > > >
> > > > > As far as a completely chrome frame goes, OUCH! Costs a bit of money
> > for
> > > > > a good plater to do it; so there's no point in doubling it by
> sending
> > it
> > > > > to someone else to hand to a plater. Find you own guy and save the
> > money
> > > > > for a payment on your Ferarri, like Joe said. Good luck.
> > > > >
> > > > > Brian Baylis