 Correct lug bolt finish?, Fuchs 4-spoke |
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Model Specific Information
914/4: 70 71 72 73 74 75 76 914/6: 70 71 72
| bbrock |
 Dec 19 2018, 02:55 PM
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#1
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914 Guru  Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains 
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Mine are rust and green paint. The tech who did the hub centric recall apparently got carried away and blobbed every frickin' bolt with paint. Any trace of original plating is now gone and I'm trying to remember how they were finished so I can have them replated. Chrome? Nickel? Other? (IMG:style_emoticons/default/confused24.gif) I seem to recall they weren't too shiny but that may be because they were already tarnished when I got the car, or just bad memory.
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| davep |
Dec 19 2018, 03:21 PM
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#2
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914 Historian Group: Benefactors Posts: 5,144 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
My belief is that the steel bolts were first copper plated, and then cadmium plated.
If you have ever seen corroded copper with a bluish green color, then you should recognize the coating on the bolt as the remains of the copper plating. This is similar to the "triple Chrome" plating on bumpers. First a layer of copper is plated on the steel, then a layer of nickel, and finally a layer of chromium. The copper bonds readily to the steel. This allows a better adhesion of the nickel. Finally the chromium protects the nickel layer from corrosion. The bright reflective silver color you see is the nickel layer, while the chromium is so thin as to be transparent. |
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| Tom_T |
Dec 19 2018, 04:09 PM
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#3
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TMI.... Group: Members Posts: 8,318 Joined: 19-March 09 From: Orange, CA Member No.: 10,181 Region Association: Southern California
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QUOTE(davep @ Dec 19 2018, 02:21 PM)  My belief is that the steel bolts were first copper plated, and then cadmium plated. If you have ever seen corroded copper with a bluish green color, then you should recognize the coating on the bolt as the remains of the copper plating. This is similar to the "triple Chrome" plating on bumpers. First a layer of copper is plated on the steel, then a layer of nickel, and finally a layer of chromium. The copper bonds readily to the steel. This allows a better adhesion of the nickel. Finally the chromium protects the nickel layer from corrosion. The bright reflective silver color you see is the nickel layer, while the chromium is so thin as to be transparent. The copper is also softer & in several plating layers on a rougher piece (e.g.: for a CW resto-rechrome) so that it can be the material polished to make the bumper or other chrome piece(s) baby-butt-smooth. The Lug Bolt finish was know as "Silver Cad" (cadmium) plated, & were not super shiny as the chromed aftermarket repros of today. More akin to the anodized wheel finish of the 2L Fuchs, or the silver painter Pedrinis & Baby-Gas Burner Mahles alloy wheels & the stock/base silver painted steelies. (IMG:style_emoticons/default/santa_smiley.gif) (IMG:style_emoticons/default/beerchug.gif) Tom /////// |
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Posts in this topic
bbrock Correct lug bolt finish? Dec 19 2018, 02:55 PM
bbrock Thanks guys, this is very helpful! :beer2: I a... Dec 19 2018, 05:01 PM davep That looks exactly like the corroded copper layer.... Dec 19 2018, 09:46 PM
bbrock
That looks exactly like the corroded copper layer... Dec 20 2018, 10:08 AM Cal
[quote name='davep' post='2675189' date='Dec 19 2... Dec 20 2018, 12:04 PM Cal These are bright silver zinc plated on my 2.0L Fuc... Dec 19 2018, 10:05 PM rgolia Any recommendations on where to send bolts for ref... Dec 20 2018, 07:23 AM rhodyguy Any idea how much Quality Plating gets for doing a... Dec 23 2018, 09:07 AM bbrock
Any idea how much Quality Plating gets for doing ... Dec 23 2018, 11:03 AM turk22 Cal,
will the simichrome remove the anodizing on... Dec 23 2018, 10:33 AM Cal
Cal,
will the simichrome remove the anodizing o... Dec 23 2018, 03:13 PM rhodyguy I think I have 3 sets to be done. 2 for sure. I wo... Dec 23 2018, 11:14 AM |
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