Anyone in TREG work in an area where there is H2S (fart gas / rotten egg smell); I have just moved back to Taupo, NZ after a few years away.
When we spec anything for installation around here it is coated as H2S eats copper fairly quickly; uncoated electronics generally don’t last more then a year; most modern stuff the PCB’s are coated in a thin layer of plastic to prevent contamination.
Taupo atmosphere is fairly low in H2S, can smell it on cold mornings when there is an inversion layer trapping the nights gas.
I sometimes work in Rotorua, atmosphere is high in H2S, can smell it always, cold mornings can get pretty smelly.
Electronics especially don’t like it when they get a bit of moisture in there with the gas as it increases the reaction rate significantly.