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#1 |
Senior Member
Join Date: Sep 2019
Location: The Villages, FL
Posts: 103
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Fact or fiction: the neoprene gasket for the headlight lens has an adverse effect on the bucket finish? It tarnishes the aluminum surface?
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#2 |
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Join Date: May 2010
Location: Oregon
Posts: 5,963
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Where is there any aluminum?
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#3 |
Senior Member
Join Date: May 2010
Location: Clinton,WA/Whidbey Island
Posts: 4,104
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Should be cork tho!
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www.whidbeymodelaclub.com |
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#4 |
Senior Member
Join Date: Jun 2010
Location: Redwood City, CA
Posts: 1,591
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Here Here!!!......cork.
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1928 "A" Phaeton (mid year with many early features) 1933 "V8" Closed-Cab Pickup Truck (originally a Model B, 4 Cylinder dating to May, 1933)
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#5 |
Senior Member
Join Date: Sep 2019
Location: Fort Gratiot, Michigan
Posts: 2,296
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#6 |
Senior Member
Join Date: Aug 2010
Location: Port Orchard, WA
Posts: 1,498
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https://www.brattons.com/newly-re-to...eflectors.html
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1931 160B & 1931 68B If you don't have time to do it right the 1st time, how do you have time to do it the 2nd time? |
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#7 | |
Senior Member
Join Date: Sep 2019
Location: Fort Gratiot, Michigan
Posts: 2,296
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#8 |
Senior Member
Join Date: May 2010
Location: Windy City
Posts: 2,919
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The original composite cork gaskets were bonded with vulcanized latex. Vulcanization is a cross-linking process that uses sulfur. Those gaskets would, upon gradual deterioration, out-gas sulfur dioxide. Sulfur dioxide reacts with silver to produce the classic silver tarnish that starts light yellow and progresses to black.
Back in the day coal was king in heating buildings and steam powering trains and industry. Because of the high sulfur content of most coal the atmosphere had quite a bit of sulfur dioxide that also contributed to silver tarnishing. A lot of people mistakenly believe the yellow to black silver tarnish is oxidation. It is a sulfur reaction. Silver oxide is white and does not occur with atmospheric exposure at environmental temperatures. Modern composite cork is bonded with a modified butyl compound and does not out-gas sulfur compounds. They have no affect on silver. Also, today's atmosphere is very low in sulfur compounds so silver reflectors need far less maintenance than they did in the Model A era. A polychloropene ('Neoprene') gasket is relatively unreactive and does not out-gas any oxidant compounds. It will not directly react with silver or aluminum. Uncoated polished aluminum will react with oxygen in a damp atmosphere and oxidize to a grayish surface in a few months. Brattons aluminized reflectors are overcoated with a silicate compound that isolates the metal surface from the atmosphere. |
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#9 |
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Join Date: May 2010
Location: Long Island, NY
Posts: 3,470
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False notion! My 45B Coupe has neoprene with aluminum reflectors since neoprenen became available. There is no evidence of tarnishing. My 190A Victoria has neoprene and aluminum since 2016 and there is no evidence of tarnishing.
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Bob Bidonde |
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#10 |
Senior Member
Join Date: Sep 2019
Location: The Villages, FL
Posts: 103
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Thank you for the information. Yes, I was referring to the reflectors. Great explanation from MikeK.
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#11 |
Senior Member
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,909
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I had my reflectors re-silvered 10 years ago. I just opened one up for the first time late this summer to replace a bulb. They looked like I just had them done.
Using cork gaskets.
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Dave / Lincoln Nebraska |
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#12 |
Senior Member
Join Date: Sep 2019
Location: Fort Gratiot, Michigan
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#13 |
Senior Member
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,909
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Wayne - [email protected] Craig Riker 419-290-4442 (Ohio)
Don't remember the price but it was rather reasonable and quick turn around.
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Dave / Lincoln Nebraska |
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#14 | |
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Join Date: Sep 2019
Location: Fort Gratiot, Michigan
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#15 | |
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Join Date: May 2010
Location: Portland, Oregon
Posts: 5,906
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Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole. ![]() |
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#16 |
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Join Date: Oct 2014
Location: Charlotte, NC
Posts: 310
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My 31 S/W Town Sedan had silvered reflectors when I bought it 38 years ago, every car coming towards me at night flashes their lights at me. They are as bright now as they were when I bought the car. No tarnish so far, and I would pay the extra to have them done if and when I buy another model A.
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#17 | |
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Join Date: May 2016
Location: Glide, Oregon
Posts: 1,339
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Ruth "Sometimes you really DO need to read the whole thread" |
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#18 |
Senior Member
Join Date: Oct 2014
Location: Charlotte, NC
Posts: 310
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My lights are adjusted perfect
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#19 |
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Join Date: Sep 2016
Location: Manchester, Mich
Posts: 40
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#20 |
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Join Date: May 2010
Location: Oregon
Posts: 5,963
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