Protecting PCBs from Moisture and Corrosion

Dear PCB enthusiasts,

If you’re like me, you’re always looking for the best ways to protect your circuit boards from moisture and corrosion, especially when they’re used in outdoor equipment. Currently, I’m experimenting with coating my boards with a specific silicone, but I’m exploring alternative methods for two main reasons:

• The coating doesn’t fully address the issues of aging and corrosion, as some boards still show signs of corrosion around the connectors.
• I’m planning a stacked board setup and wondering how to protect the board-to-board connector effectively.

As I delve into this challenge, I’ve been studying various approaches used in engine ECUs, such as complete potting, surface coating, and enclosing naked boards in insulated enclosures. However, I’ve noticed a wide range of techniques with different levels of success.

If you have experience in this area or have encountered similar challenges, I would greatly appreciate it if you could share your insights and solutions. Your expertise could help me and others in the community enhance our PCB protection strategies.

Thank you in advance for your valuable contributions!