Rust on hot-dip galvanized balcony railing

[Alexn72]

Isn't that possible?
Does anyone know if "svetsmetall" can rust?

No, not with "svetsmetall" and yes, if they haven't used stainless filler rods, they will rust faster than the workweek is over.

 

[Magnus21]

No, not with "svetsmetall" and yes, if they didn't use stainless filler rods, they will rust faster than the workweek is over.

The rust doesn't appear randomly but in places logical for drilling. Considering that and what you write, I would think it is the welding metal that is rusting, and perhaps iron adjacent to where the zinc protection has been damaged. There's almost circular rust in some places, like after a hole.

Replacing the railing is a messy idea. There should reasonably be some way to rust-proof this anyway.

 

[Dan_Johansson]

The rust doesn't occur randomly; it's in places reasonable for drilling. Considering that and what you're writing, I would think it's the welding metal that's rusting and perhaps the iron nearby where the zinc protection is damaged. It's almost circular rust in some places, like after a hole.

Replacing the railing is a messy idea. Surely there's a way to protect it from rust anyway.

No. There's no way that lasts more than a year or two....

If you've paid for a hot-dip galvanized and powder-coated railing, just make a complaint.

 

[Alexn72]

The rust does not occur randomly but in places reasonable for hole-making. Considering that and what you're writing, I would think it's the welding metal that's rusting, and perhaps iron connected to where the zinc protection has been damaged. It's almost circular rust in some places, like after a hole.

Replacing the railing is a troublesome idea. There should reasonably be some way to protect this against rust anyway.

The usual when welding on galvanized things is to sand away just where you are going to weld. The nearest galvanization risks burning away if you get the material too hot. Then clean, spray on zinc spray and then paint. It's a good method. So sand, zinc, and then paint.