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Catalina/Capri 25/250 Sailor's Forums

Catalina 250 Specific Forum

How to "cold galvanize"

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kevinmac
Admiral

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USA
732 Posts

Initially Posted - 06/17/2006 : 10:56:52

Hi folks,

I got my lanching wheel/spare tire bracket back today. The guy did a great job, and it is indeed entirely bolted to the trailer, not welded.

So now I need to "cold galvanize" the parts that he fabricated. (He also suggested I could have someone powder coat them, but paint gets dissed here a lot, and I can reapply the cold galvanizing stuff every couple of years.)

Can one of you guys that are a lot smarter than me about this stuff (and that is not hard) tell me how I should prepare the parts before painting this stuff on?

Also, should I paint the stuff on the nuts and bolts, etc.? I am worried about clogging the threads...

Thanks, as always, for your help. Pictures to follow.

Kevin Mackenzie
Former Association Secretary and Commodore
"Dogs Allowed"
'06 C250WK #881
and
"Jasmine"
'01 Maine Cat 30 #34

Edited by - on

britinusa
Web Editor

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USA
5404 Posts

Response Posted - 06/17/2006 : 11:34:10

Never heard of it, so I googled it :)

http://www.clearcoproducts.com/cold_galvanize_primers.html
for the primer
and http://www.clearcoproducts.com/cold_galvanize_sprays.html
for the Top coat.

Paul

Edited by - britinusa on 06/17/2006 11:35:56

atgep
Master Marine Consultant

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1009 Posts

Response Posted - 06/17/2006 : 15:57:30

I picked up a spray can of it at Home Depot. It has done a good job on the trailer axle welds and such. Be carefull as I am sure this paint is very toxic. Little silver particles fly out when you spray it.

Tom.

Edited by - on

Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 06/17/2006 : 19:04:31

Kevin I used it on my launch wheel too. I don't know if I did it right but it's working. I worked it over with a wire brush, then put 3 coats of primer on letting each coat dry in between. Then sprayed 3 coats of the cold galvanize on again letting each coat dry before applying the next. I keep a can of the cold galvanize handy and when ever I see any rust I hit it with a wire brush and give it a coat.

Don't forget to post some pictures of your new setup.

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 06/18/2006 : 17:54:11

Kevin,
Does you new launch wheel look like [url="http://www.trailrite.com/prod05.htm"]this?[/url]

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britinusa
Web Editor

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USA
5404 Posts

Response Posted - 06/18/2006 : 19:08:44

<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Does you new launch wheel look like this?<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Would be even better if the axle was round instead of square, then you would not have to pull it out, flip it, put it back.
Just pull the pins, rotate it, put the pins in.
All the same, it's pretty cool.
If it had a round axle, I would buy one tonight!

Paul

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 06/18/2006 : 19:34:48

Paul, I like that round axle idea.

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kevinmac
Admiral

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USA
732 Posts

Response Posted - 06/18/2006 : 23:37:41

Mine looks sorta like the one in the picture. I called Trail-Rite before making mine, and they said that the one they build (in the picture) would not work for a C250 trailer. In then end, I spent about the same.

The guy who fabbed it says it would be better with a round axle too. Why he didn't suggest it before making mine... ;-)

Pictures this week.

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zeil
Master Marine Consultant

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Canada
1318 Posts

Response Posted - 06/20/2006 : 23:19:14

Kevin:
The product that I would highly recommend and we have used for years and years with great success for all kinds of moist/damp environments and salt exposure applications is called cold galvanising spray or "liquid galvanising". When applied it is identical in looks to the galvanising on your trailer.

It is self sacrificing just like the galvanising on your trailer eliminating rusting of scratches and smallish bear spots. It is a 95% pure zinc product and is noted to have been tested for up to 2000 hours of 5% salt spray.

It comes in a spray can at about $7 to $9 dollars per can, is quick drying 5 - 10 minutes and is ready for the next coat if required. Most (all) paint stores carry a version of the product. The nice thing, aside from the effectiveness, is the fact that you can hardly detect what is touch-up and what is original on your trailer.

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zeil
Master Marine Consultant

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Canada
1318 Posts

Response Posted - 06/20/2006 : 23:29:39

Kevin: Forgot to mention about preparation of the to be coated surfaces. It is applied on any oil-free flake free metal surface without any further preparation.

The zinc will bond to metal surfaces. Rough/smooth surfaces will show rough/smooth after the liquid galvanising is applied.

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