How to prevent corosion damage in a salt air environment?
Solution 1:
Electronics manufacturers that have to cope with this environment varnish their PCBs. The main cost on a production line is the time to mask off the connectors rather than the cost of the varnish. You can buy spray on varnish and it doesn't always need an oven to cure it.
When a really heavy duty protective layer is required, this is called conformal coating, and can be achieved by dipping the PCB into the coating. Again, it's the masking thats the expensive part (time consuming), and thicker coatings may require an oven bake to cure them. The ability of hot components to dissipate the heat will decrease when they are coated, so then a derating factor applies to power components. This is one of the reasons that industrial electronics is more expensive than consumer electronics.
The main reliability issues you will have are on contacts of connectors and switches. Decide if you'd rather get ruggidised, marine type equipment eg Panasonic Toughbook or just replace things when they fail, at a higher rate than normal. It may well not be worth that much effort to protect consumer grade items which will obselete in a short period anyway.
Solution 2:
Keep your system free of dust.
Dust attracts moisture, and holds it against components. Moisture combines with salt to corrode metal. Blow the system out with compressed air once a month. Change your furnace+A/C filters monthly.
Keep the humidity low. See above.
Avoid wide temperature swings
Fast changes in temperature, up or down, causes condensation.
Solution 3:
I'd recommend wiping down the exposed areas with WD-40. This may not be an option or other smaller gadgets, but for bigger things that sit exposed to the environment everyday, this may help you out.
http://www.wd40.com/faqs/
Here's a list of 1,997 uses from the Tacoma Wheelmen's Bicycle Club: http://www.wd40.com/files/pdf/wd-40_2042538679.pdf
some of the unofficial uses:
- Protects snow shovels from the effects of salt
- Protects bike frame from salt water corrosion
- Prevents salt damage on aluminum exterior components of personal watercrafts
If it works for you, perhaps you could drop them a line and add yours to the list!