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Galvanized bolts ok for aluminum?
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<blockquote data-quote="Al U Minium" data-source="post: 421433" data-attributes="member: 20945"><p>Stainless steel is steel with nickle in it. Add it to aluminum and you have a electrolysis with water added. My transducer bracket was SS and ate that size hole through the stern. Every place I used SS corroded the aluminum it came in contact with. I use my boat almost always in salt water but fresh will do it too. With galvanized steel it is coated with zinc, the zinc will disappear first from electrolysis then you are left with the steel.</p><p></p><p>There are tables showing what metals will create the highest corrosion from electrolysis. That is where to start.</p><p></p><p>Separation of the materials from each other only makes c more active. Mechanical bonding of the materials can help stop electrolysis but the materials must be sealed against air and moisture intrusion.</p></blockquote><p></p>
[QUOTE="Al U Minium, post: 421433, member: 20945"] Stainless steel is steel with nickle in it. Add it to aluminum and you have a electrolysis with water added. My transducer bracket was SS and ate that size hole through the stern. Every place I used SS corroded the aluminum it came in contact with. I use my boat almost always in salt water but fresh will do it too. With galvanized steel it is coated with zinc, the zinc will disappear first from electrolysis then you are left with the steel. There are tables showing what metals will create the highest corrosion from electrolysis. That is where to start. Separation of the materials from each other only makes c more active. Mechanical bonding of the materials can help stop electrolysis but the materials must be sealed against air and moisture intrusion. [/QUOTE]
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Galvanized bolts ok for aluminum?
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