The plastics plant you work at is barely a year old, and there’s already evidence of corrosion in many enclosures. Making matters worse, most of these enclosures are associated with the three critical production lines.
The plant is in Florida, near the coast. The high humidity was a plus in the location decision, due to static electricity issues with the dry plastic pellets. Some thought went into accommodating the humidity equipment-wise; for example, electronic circuit boards are all sprayed with crystal-clear acrylic to protect the traces. Now, maintenance techs are finding water droplets on those boards, rust on enclosure mounting bolts, and green deposits on power wiring terminations.
How might you address this?
Check your raceways. Do you have drains at low points? If not, install them. It’s likely that raceways are collecting condensate and bringing it to those enclosures. You may also consider using firestopping at key points, coordinating that effort with the drains so you don’t trap water in the raceways.
Install new fasteners to replace the rusty ones. But before inserting the fastener into the hole, smear outdoor-grade caulking on the underside of the bolt head. Once the bolts are torqued, cover each bolt head with this same caulking. Be sure to check with your production department about silicone before using a silicone caulking. If the parts your plant is making will be painted by the end-user (or at your plant), you can’t use silicone.
Also, ensure all metallic parts are bonded, so there’s no current flow between them.