Author Topic: Hood latch finish - phosphate?  (Read 3876 times)

Gimmea250swb

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Hood latch finish - phosphate?
« on: July 03, 2022, 12:12:20 PM »
Oct 69 z/28.  What is the proper finish for the hood latch and guard that covers it?  The coloration looks different on this pic.  Are they the same color or is the guard just dipped very quickly?  To me, it looks like the latch is darker than the guard.


« Last Edit: July 03, 2022, 12:35:16 PM by Gimmea250swb »

169INDY

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Re: Hood latch finish - phosphate?
« Reply #1 on: July 03, 2022, 03:00:44 PM »
Zinc Phosphate.
https://www.palmettoenterprisesparkerizing.com/

The resulting-colored results vary with, Metal composition of its constituent materials, Differing Heat treating of Parts, Duration in the solution, Prep methods, Surface profile,  Post treatment, Time in service, Exposure to Elements and Moisture, etc.
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

70z28lt1

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Re: Hood latch finish - phosphate?
« Reply #2 on: July 03, 2022, 07:51:26 PM »
Not to mention angle of the camera and lighting.  Look at the sides of the raised beads.  A bit darker to me.

firstgenaddict

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Re: Hood latch finish - phosphate?
« Reply #3 on: July 03, 2022, 07:57:52 PM »
The above photo is one I took of the Black RS/Z survivor AFTER I cleaned and coated the parts with cosmoline.
IIRC The entire part is plated as an assembly, minus the spring, which probably would be affected by the heat and the process.
Hood hinges and hood catches are typically Manganese Phosphate, which is darker than zinc phosphate and often has a crystaline look prior to oiling.
Palmetto also sells Manganese phosphate - I plated some hinges and catches a year or so ago.   

James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

169INDY

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Re: Hood latch finish - phosphate?
« Reply #4 on: July 04, 2022, 12:00:46 AM »
Well the Photo of the Black RS/Z survivor is consistent with the New Car test HOT ROD magazine car,  in that the "Hook" certainly seems darker.
Cropped photo attached.


From Jerry's Book:
Hood hinges grey or black phosphate
Hood latch assembley grey or black phosphate

What does the New Judging Guideline book suggest?
Jim
68 SS/RS L35 Th-400 LOS
69 Pace Car L48 Th-350 LOS
68 Z28 M21 LOS

firstgenaddict

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Re: Hood latch finish - phosphate?
« Reply #5 on: July 04, 2022, 04:32:10 AM »
Any plating difference could be the hardness of the metal being phosphated.
Here is another of the black car where the hook looks the same as the base.
And then of another survivor hood catch which I cleaned and treated with cosmolined too.
James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

bkhpah

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Re: Hood latch finish - phosphate?
« Reply #6 on: July 04, 2022, 11:06:06 AM »
The original photo shows a serrated washer and a flat water holding on the horn's..BKH

Gimmea250swb

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Re: Hood latch finish - phosphate?
« Reply #7 on: July 04, 2022, 02:30:08 PM »
Thanks for the guidance.  Here’s the finished product.


firstgenaddict

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Re: Hood latch finish - phosphate?
« Reply #8 on: July 04, 2022, 06:45:12 PM »
The original photo shows a serrated washer and a flat water holding on the horn's..BKH
Is there a running change in the AIM for it?
Having recently gone through the legends judging guide, before dec 68 got the serrated zinc plated pinch point on the horn.
If not mistaken the crop is of the Hot Rod test car, early LA built with the 68 rear stripe arrangement.  09A or 09B.
Here is another 09B LA Z28 original owner original paint. with the serrated zinc plated 5/16 indented head pinch point also has the 68 Rear stripe layout.
James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa