In order to prevent galvanic corrosion, an aluminum boat must be insulated from the davits and gripes. Which of the following is acceptable as an insulator?
• Galvanic corrosion between dissimilar metals • Properties of good electrical insulators in a marine environment • Effects of water absorption on insulating materials
• Which material will stay non-conductive even when wet and under heavy compression between metal parts? • Which options are more likely to absorb water or stay damp and salty, creating a path for electric current? • Think about long-term durability: which material can resist rot, swelling, and breakdown at sea?
• Check which materials are non-porous and do not absorb water • Check which material is commonly used as a structural insulator between metals on ships • Eliminate materials that can hold moisture or rot, as they become partially conductive over time
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