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Old 19-02-2007, 09:05   #91
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With powder coating it is very durable but with an anchor getting wedged and buried in rocks, gravel, and sand once it began to chip it would be over pretty quick. IMO
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Old 19-02-2007, 10:05   #92
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Question

If you have to destroy a shackle bolt cutters are a neat way, I agree Mikado.

How do you do this powder coating? And what powder do you use?
Never heard of this until now.

Ignorant eh?
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Old 19-02-2007, 10:36   #93
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Skipperaris,

Powder coating is like an ultra hard paint that bonds extremely well to aluminum and steel. Like any coating, the metal needs to be clean and rust free. In most cases if the item you want to powder coat is used, then you would have the item sandblasted/bead blasted prior to the coating which most powder coaters do.

The item is usually hung from a conveyor with and connected to a positive electrical charge. The dry powder is sprayed on and sticks because it has a negative charge. Just like paint, you can vary the thickness. The item is then put into an oven and the powder turns to liquid and coats the item with a very smooth finish. The finished product is so durable that you can hit it with a hammer and it won't easily chip or even scratch. There is usually a minimum charge of about $30 so I'll bring in several small items at the same time to have them done. If I am refinishing or replacing anything on my boat that is currently painted, I will ususally have it powder coated and should never have to worry about it again. Also, just like paint, you can get any color you want, even chromes, marble finish, textures, candy apple, etc
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Old 19-02-2007, 11:32   #94
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As Zeus said, as soon as it does chip, it is over pretty quick. There are differing forms of powder coating pre-treatment. Some things are acid etched. Aluminium can often be powder coated. But once it starts to delaminate, it all goes to custard really quick.
The coating maybe hard, but it would not be hard enough to handle anchor duties.
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Old 19-02-2007, 11:46   #95
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letting the shackle soak up some penetrating oil and using the monkey wrench method should work, otherwise a grinder with a cutting disk will make short work of it. Do it on the dock, wear your safty glasses and aim in a safe direction. When putting any shackles together coat the threads with "never cease" or some kind of thick grease. Molly your shackle with stainless wire or plastic zap-straps so it can't loosen itself. Re-grease once a year, and you will not have this problem again.
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Old 19-02-2007, 15:23   #96
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Craig you can rest assured that I did not copy the Rocna. I am certain that no one can make those better than you.
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Old 19-02-2007, 16:08   #97
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Had a powdercoated front beam on my last cat, caused me nothing but grief where it bolted into the hull.

Moisture got in underneath and aluminium did what it does and it flaked of sections.

Definite no no

Dave
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Old 19-02-2007, 16:45   #98
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Quote:
Originally Posted by Mikado
Skipperaris,

Powder coating is like an ultra hard paint that bonds extremely well to aluminum and steel.
Thanks for the education Mikado.
I don't think we have it over here unless it is called something else or I'm slow following developments.

If I had to do Aluminium I would have it anodised which is similar.
As Alan says once it starts to delaminate, it all goes to custard really quick.

For steel there is chrome and nickel plating apart from the classic galvanising.
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