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General Jet Boat Discussions
Question about UHMW and poultice corrosion
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<blockquote data-quote="Ranchero50" data-source="post: 290334" data-attributes="member: 1523"><p>I think the sealing decision falls under your hulls expected lifetime and how fast you expect the corrosion to eat through the aluminum. I'm more concerned about the stainless fasteners corroding the aluminum than minerals. I think a decent epoxy coat on the hull would keep most salt corrosion away except where the fasteners were. </p><p></p><p>On mine if and when I UHMW it I plan on using 1"x.125" angle to act as standoffs on the edge of the original bottom strakes. I'll drill / tap / epoxy the material to the standoffs and leave the 1.25" gap between the hull and the material. It'll be open at the front and rear so hopefully the space will drain quickly on launch. I also thought about drilling some angled 3/8" or 1/2" holes to act as air inducers / water drains (ala hull steps) to lessen the wetted surface on the UHMW. With the gap I'll still be able to flood and wash out the space as needed.</p><p></p><p>Jamie</p></blockquote><p></p>
[QUOTE="Ranchero50, post: 290334, member: 1523"] I think the sealing decision falls under your hulls expected lifetime and how fast you expect the corrosion to eat through the aluminum. I'm more concerned about the stainless fasteners corroding the aluminum than minerals. I think a decent epoxy coat on the hull would keep most salt corrosion away except where the fasteners were. On mine if and when I UHMW it I plan on using 1"x.125" angle to act as standoffs on the edge of the original bottom strakes. I'll drill / tap / epoxy the material to the standoffs and leave the 1.25" gap between the hull and the material. It'll be open at the front and rear so hopefully the space will drain quickly on launch. I also thought about drilling some angled 3/8" or 1/2" holes to act as air inducers / water drains (ala hull steps) to lessen the wetted surface on the UHMW. With the gap I'll still be able to flood and wash out the space as needed. Jamie [/QUOTE]
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Question about UHMW and poultice corrosion
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