corosion

[brett burton ⚜]

Hey, I'm looking for advice for stopping corrosion on electronics due to humidity.  I have some stuff installed in a humid area and I'm worried about corrosion.  I'm using waterproof enclosures, and I have some desiccant but I'm still worried because the air is like a rain forrest here.  I know conformal coating or potting might be the best approach, but I don't know how practical that is for the time frame I'm working with.  I'm wondering if I should just cover everything with silicone, maybe 3M silicone paste would work?  Suggestions?

-Brett

[Pablo Martinez]

Sacrificial anode? (or cathode, I forget..)

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[Michael Zions]

Performix Plasti Dip. It's available as a spray or a dip, in little cans or by the gallon, and it's carried by Home Depot, Lowes, and Amazon. I use it to all the time; I have some here in the lab along with a coated lead brick. Apply it in thin layers and let it set between each, then cure it overnight. It looks and feels a lot like that rubbery material used in plier grips. There are also additives available to make it glossy or glittery, if you need extra flair.

Michael Zions

[Bradley Laboe]

http://www.nanoprotech.ru/eng/

[w1jp]

Just put it all in an IP7 project case. E.g., Waterproof Plastic Electronic Project Box Enclosure Instrument Case DIY #02 https://www.amazon.com/dp/B00PI6P0BA/ref=cm_sw_r_awd_OI.Ivb0F1WG7D

[jpbar...@aol.com]

Maybe you are using this already with your enclosure, but I've used waterproof cable connectors for cables entering enclosures.  One connector per cable and you should find ones with a flat gasket to insure a good seal with the enclosure wall.  Alternatively you can use some silicone sealant for the seal to the enclosure wall.

I've also used silicone conformal coating on PCBs and I use a hair dryer to accelerate drying.  Ideally wires would be soldered right to the board.

At times when I needed connectors to the board, I've used ones with gold plating/flashing with care exercized in not getting the coating onto contact pins.  Ideally in-line waterproof connectors can be used within the enclosure with wires again soldered right to the board.

If you have a crystal on the pcb or any other high-impedance circuits you want use a potting or silicone coating meant for electronics with low conductivity and low water adsorption properties.

I would think between the conformal coating and the enclosure you should be fine.

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[HelloK omputer]

conformal coating. make sure to hit the crystals specifically.