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what to spray on circuit board to prevent corrosion in salt water environment


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In my 2012 Wakesetter VLX Saltwater Series the blower stopped working.  When they checked the circuit board under the dash containing the fuses the area on the board that controls the blower was rusty.  The boat is used in salt water.  Is there something I can spray on the circuit board to prevent or delay corrosion?  I have a can of Boeshield T-9 waterproof lubrication spray and I called the company and they said to be safe it should not be sprayed on a circuit board.




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WD-40 can work to keep water/salt corrosion from existing -- and I would probably use it for this application -- but the complaint is that it can attract dust and dirt.  This stuff is amazing and exactly what you're looking for -- it's just a little more expensive.  https://www.amazon.com/Lear-Chemical-ACF50-Anti-Corrosion-Lubricant/dp/B000P1C8UO

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i would not use wd-40 on a printed circuit board.

visit an electronics store and ask what they have on the shelf that would be similar to humiseal.

it's a conformal coating specifically for electronics.

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I believe 3M, but not sure, makes an electrical grade clear lacquer. I have a can but it's back in NJ.  I use it on my saltwater boat (70 Winner) with good results.

edit; comes in a spray can.

Edited by electricjohn
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