{"id":1425,"date":"1999-11-30T00:00:00","date_gmt":"1999-11-30T05:00:00","guid":{"rendered":"https:\/\/setsail.com\/?p=1425"},"modified":"2015-10-16T12:16:07","modified_gmt":"2015-10-16T17:16:07","slug":"rudder-stock-on-aluminum-boat","status":"publish","type":"post","link":"https:\/\/setsail.com\/rudder-stock-on-aluminum-boat\/","title":{"rendered":"Rudder Stock on an Aluminum Boat"},"content":{"rendered":"
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I am building an Aluminum Sailboat with a spade rudder and rudder stock. I am planning to use UHMWPE plain bearings. Would it be a good idea to hard anodise the shaft in the area of the bearings to reduce the wear? Would there be any corrosion issues? Thanks, Howard<\/p>\n<\/div>\n

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Hi Howard: There are several issues at play. First is the alloy of the rudder stock. If this is 6061 or 6063, it would be best to anodize because of long-term corrosion under water. 5083\/6 is not so sensitive and you can get away with using it bare (it is also stronger).<\/p>\n

As to wear, while the anodized surface is indeed harder, both alloys will wear on the UHMW before the aluminum sheds material.<\/p>\n

Bottom line–if you can anodize without busting the budget, I would do so.<\/p>\n

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