Power Company came out and said there was corrosion on the neutral line and they'd replace the connectors but that the problem was on the inside.
This totally stinks of a loose/corroded neutral causing voltage unbalance on a multiwire circuit.. This could cause one leg of the circuit to potentially see >200V, which would fry most 120V anything pretty quick.
1) Has the problem reoccurred since your power co. cleaned up their connections?
2) Was the other equipment which was damaged plugged into the same circuit? (You mentioned the breaker tripping while using an iron. Did you take notice of what all turned off when that occurred?)
3) Do you notice dimming lights or other voltage fluctuations for seemingly no reason?
4) What year was the home built? (to get an idea on possible wiring methods. Zinsco came to being in the mid 50's and died (not soon enough) in the early 80's)
Zinsco breakers are famous for not maintaining good contact with the busbar in the panel. They'll just kinda arc between the contact clips and the bus under load, the clips will expand due to heating from the poor connection and you'll lose all power on that specific breaker (or the half the house if it's a leg of the main). Once this happens, the contact clip will cool down as no load is passing through and eventually make contact again, essentially cycling. 240V equipment can cause eerie things to happen on the 120V side if you're losing a leg on your main circuit breaker.
I've replaced well over 100 Zinsco panels around So Cali... This being the #1 reason for at least 90% of them.