interesting science question

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mopherman
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Thu Sep 06, 2007 7:52 pm

well, my science homework had an interestion question today so i thought i would share it with you.

How would you rust proof a large sea-bearing ship? cheaply
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TurboSuper
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Thu Sep 06, 2007 7:58 pm

Rust-proof paint?
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thespeedycicada
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Thu Sep 06, 2007 7:58 pm

lol thats a very odd question from a science book i would expect that from a shipbuilding book not a science book from that i might expect "how would you inexpensively prevent oxidation of an object frequently exposed to water?" :lol:
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mopherman
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Thu Sep 06, 2007 7:59 pm

TurboSuper wrote:Rust-proof paint?
wouldnt it kinda wear off after a couple days in salt water?
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mopherman
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Thu Sep 06, 2007 8:01 pm

thespeedycicada wrote:lol thats a very odd question from a science book i would expect that from a shipbuilding book not a science book from that i might expect "how would you inexpensively prevent oxidation of an object frequently exposed to water?" :lol:
yeah, it was origionaly like that
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paaiyan
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Thu Sep 06, 2007 8:02 pm

I'd say plate it with tin by way of a large-scale electrolysis.
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Marco321
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Thu Sep 06, 2007 8:20 pm

sacrificial anode

Its used on alot of boats
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clide
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Thu Sep 06, 2007 9:53 pm

Yep, as Marco said, a sacrificial anode (usually zinc) would be the way to go. Combining that with painting would maximize the life of the anode by reducing the size of the cathode.
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paaiyan
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Thu Sep 06, 2007 10:04 pm

Sacrificial anode, that's a new one on me. I have an idea what it might be, but you guys wanna help me out here?
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clide
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Thu Sep 06, 2007 10:13 pm

Basically you just attach a bunch of zinc blocks to the boat and they will corrode rather than the boat. They you just need to replace them periodically. Which is a lot easier than replacing the whole boat.

http://en.wikipedia.org/wiki/Sacrificial_anode
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paaiyan
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Thu Sep 06, 2007 10:14 pm

Ah, that's what I was thinkin. Sounds like a good idea to me.
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hi
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Thu Sep 06, 2007 10:16 pm

make it out of gold. not cheap, but it would work.
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Fnord
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Thu Sep 06, 2007 10:36 pm

I imagine adding a thin brass coating could work. Don't know how much it would cost, but it would last forever. As long as they don't hit a reef. Or an iceberg.
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MrCrowley
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Thu Sep 06, 2007 10:45 pm

Sacrifical and paint maybe, I would ring up my grandad as he used to pilot huge ships but i can't be bothered. :P

And _Fnord on the subject of hitting icebergs:
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paaiyan
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Thu Sep 06, 2007 10:49 pm

Hahahaha, you rock MrC.
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