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| Hull Feature on Iowa BB http://67.205.157.234/forums/viewtopic.php?f=17&t=3075 |
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| Author: | Erusia Force [ May 16th, 2012, 12:25 am ] |
| Post subject: | Hull Feature on Iowa BB |
Greetings, I have found a strange feature on the hull of Iowa class BBs that I can not find an explanation for. Can anyone identify this feature? http://dl.dropbox.com/u/79264610/405px- ... peller.png |
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| Author: | TimothyC [ May 16th, 2012, 12:39 am ] |
| Post subject: | Re: Hull Feature on Iowa BB |
First thought would be zinks. |
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| Author: | Erusia Force [ May 16th, 2012, 12:40 am ] |
| Post subject: | Re: Hull Feature on Iowa BB |
So, corrosion protection? |
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| Author: | acelanceloet [ May 16th, 2012, 4:44 am ] |
| Post subject: | Re: Hull Feature on Iowa BB |
timothy's asumption is most likely correct. that is: the perry has very similar zincs. without these, magnetic cavitation will be eating the props and hull. |
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| Author: | heuhen [ May 16th, 2012, 5:27 am ] |
| Post subject: | Re: Hull Feature on Iowa BB |
yeah that's correct that is zink, |
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| Author: | Erusia Force [ May 16th, 2012, 2:19 pm ] |
| Post subject: | Re: Hull Feature on Iowa BB |
So are those mounted on active ships or decommissioned and mothballed ships? |
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| Author: | Thiel [ May 16th, 2012, 2:35 pm ] |
| Post subject: | Re: Hull Feature on Iowa BB |
On all ships |
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| Author: | Erusia Force [ May 16th, 2012, 2:45 pm ] |
| Post subject: | Re: Hull Feature on Iowa BB |
Thank You! |
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| Author: | TimothyC [ May 16th, 2012, 5:40 pm ] | |
| Post subject: | Re: Hull Feature on Iowa BB | |
So are those mounted on active ships or decommissioned and mothballed ships?
Whenever you have two different metals in a non-neutral solution, you get electrolytic activity that chemically eats away at one or both of the metals. The Zinc is there to sacrificially degrade so that the other, more important bits of metal (like the propeller) doesn't.
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| Author: | heuhen [ May 16th, 2012, 5:54 pm ] |
| Post subject: | Re: Hull Feature on Iowa BB |
It is also mounted on Fiberglas boats |
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