Preventive Corrosion Coating.

Jiggy

Jiggy

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I have a client that replaces components roughly every 2 years, due to failure / corrosion.

They in the heart of an industrial area and close to the ocean which makes a perfect recipe for this.

i was asked, rather insisted that i get the components sealed in some sort of anti corrosion layer.

i obviously have concerns about this as i have never done this before.

1) heat
2) serviceability
3) warranty

has anyone done this, what is the pros and cons. in my opinion it cant be done with the DIY products they say i must use. if they want it, they can do it but warranty is void.

any input is appreciated.

regards
 
Jiggy said:
I have a client that replaces components roughly every 2 years, due to failure / corrosion.

They in the heart of an industrial area and close to the ocean which makes a perfect recipe for this.

i was asked, rather insisted that i get the components sealed in some sort of anti corrosion layer.

i obviously have concerns about this as i have never done this before.

1) heat
2) serviceability
3) warranty

has anyone done this, what is the pros and cons. in my opinion it cant be done with the DIY products they say i must use. if they want it, they can do it but warranty is void.

any input is appreciated.

regards
Click to expand...

What components are we talking about? A PC?
 
Look into ACF50. Works like a champ against corrosion. They use it on aircraft carrier jets.

Apparently safe for circuits. I've used it on motorcycles. Zero corrosion after years at the coast.

Edit: "ACF-50 is a state-of-the-art compound for controlling corrosion on aircraft electrical and avionics systems and airframes."
 
Last edited:
Jiggy said:
yes, basically the whole board and connections, and the more i think about it the more i cringe.
Click to expand...

Could you not buy a dehumidifier and enclose it and the PC with a box or something?
 
Denso tape, but i wouldn't take to a PC with it.
I live right by the ocean & work on fishing boats with PC's & there's no way we get failures in like 2 years.
 
Are you talking about an enterprise server solution or a desktop PC environment?
Submerged or isolated-cooling platforms generally mitigate this for enterprise systems built for mine/refinery etc.

Outdoor Edge Server Systems | Supermicro

Application-optimized embedded servers for space-constrained deployments. Multiple form factors supporting low-power Intel® processors for maximum efficiency
www.supermicro.com www.supermicro.com
 
Rickster said:
Could you not buy a dehumidifier and enclose it and the PC with a box or something?
Click to expand...
i explained that it's a terrible idea, for many reasons, also i would not be responsible if anything were to happen and blah blah,also if it possible to do this surely the manufactures would have it done already, definitely a reason why its not mainstream. i did convinced them to upgrade to an AIO so the cpu fan doesn't blow the kak directly on the board and ram. they will also invest in a dehumidifier. Thanks all for the input.
 
Jean Claude Vaaldamme said:
Clear nail polish
Click to expand...
Usually I do this, but I've also used conformal coating.
And if it is an industrial customer, I'd use that instead.
The liability slapping nail polish on it is not worth it in my opinion.
Not when conformal coating is not very expensive (especially to someone replacing every year and running a large business).
Some people on reddit report that water can get under the nail polish and then you have a really bad day; so personally I don't use nail polish when I sell electronics.

The good stuff:

422B-340g | MG Chemicals Transparent Silicone Conformal Coating, 425 ml Bottle, -40 °C min, 200 °C max | RS

za.rs-online.com za.rs-online.com

You apply it with a brush.
But you coat the PCB and pads.
You should coat the entire chip since that part literally can't corrode and will still allow the chip some convection.
So you only cover up around the pads.

If that doesn't mean anything to you, you might want to find someone who knows a bit more about electronics.

Will it overheat?
Unlikely silicone is still a half decent heat conductor, use a thermal camera before and after.
If any of the chips get hotter, slap a heatsink on top of it.
RS also sells heat sinks in all kinds of sizes.
Thermal pad and heatsink and you are golden.
 
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