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post #3 of Old 03-30-2007
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The marina put on a class on bonding of thru hulls. He told me that the older boats used a superior type of bronze that is highly resistant to corrosion. My N-30III shows no signs of corrosion or color change. I bonded them anyway to the cutlass bearing zink, 750 Ma of current flowing from thru hulls to zink
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