Have Copper boat antifouling paint, galvanic action between him and boat parts ?

Have Copper boat antifouling paint, galvanic action between him and boat parts ? And is it an danger or so little to discuss ?

 

Depends on the hull and fitting material, what is painted, how it is painted, and any other galvanic protection. Each hull fitting needs to evaluated individually.

See this chart. Anything more negative than copper will need to be protected, generally by being connected (i.e. bonded) to a zinc system.

https://goodoldboat.com/images/more_online/Galvanic_Table.pdf

Edit to add:

Also see this article..."When it comes to choosing bottom paint, substrate (surface) is a big consideration. Do you have an aluminum, fiberglass, steel or wooden boat? Most bottom paints contain some type of copper biocide, which is suitable for fiberglass and wooden boats, but not for aluminum. The copper in the paint causes galvanic corrosion, which will destroy an aluminum boat or pontoon boat. For antifouling protection on aluminum boats and underwater metal parts, you have to apply a copper-free bottom paint."

Bottom Paint Guide: Choosing The Right Bottom Paint For Your Boat https://www.totalboat.com/blogs/totalboat/which-bottom-paint-should-i-use?srsltid=AfmBOoquyc5_ZPeKXSXeMkkH0Fu4BEI3webcB0nctdT8d36RZvnzh4d8

 

Your steel and tarp boat will have no issues.