3

I'm too am a welder. User142029 is absolutely correct.Those joints are fine. It's rusting faster because it's not the same metal as the base material. The structural integrity is fine. I would clean it as best as i could with a wire wheel / cup and cold galvy spray it. Not much you can do about the underside without removal.


2

They should have re painted the beam or any parts where they removed galvanized painting along with the welds on the beam. All steel beams come galvanized painted to prevent rust from forming... To solve this problem I would recommend doing a good cleaning to remove all the rust and oxidation to the best of your ability, then go to your local home ...


1

Totally cosmetic, has not, will not weaken because of future rust. The only corrosion in the home is caused by water when mopping the floor and splashing the bare steel. The uniform grey color of the steel beam indicates it has a zinc rich primer. Mill scale would be nearly black and not as uniform in color. When the weld was made it burned off the zinc ...


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