weed killer and rust

[mudcat]

I spend too many hours weed eating my fence line. I would like to start putting weed killer down the line but, I'm afraid it will cause the fence to start rusting. I have galvienized cattle fence (red top brand) and I know that as time goes own it will rust anyway. I just don't want to speed the process up. Anyway, Will weed killer cause my fence to rust?

 

[Birdhunter1]

I don't know if it will cause it to rust quicker or not, there really isn't corrosive stuff in most weed killers. I've been doing it for years and for years before that it had been done on the same fences.

 

[midlf]

Most weed killers are a salt compound with a surfactant (detergent compound). It will rinse off with the first rain. Will it cause the fence to rust faster? I don't know.

 

[Cowboyjg]

I know it might not be quite the same thing but...If you can drive a galvy nail into pressure treated lumber and the chemicals in the pressure treated lumber take forever to rust that nail I would have to imagine that the weed killer you use along your fence line with the evaporation process being what it is couldn't hurt you fence anymore than that nail in that lumber.

It made sense to me at the time.....

 

[PineRidge]

I don't know if it will cause it to rust quicker or not, there really isn't corrosive stuff in most weed killers. I've been doing it for years and for years before that it had been done on the same fences.

As I understand it glyphosate (C[SIZE=-1]3[/SIZE]H[SIZE=-1]8[/SIZE]NO[SIZE=-1]5[/SIZE]P) is responsible for damage to pumps on spray rigs if they are not cleaned properly. That's why it's important to throughly flush & clean the equipment. It might have an adverse reaction if sprayed directly on your fence, don't know if I would chance it.

 

[Cottonhawk]

Most likely that the weed killer will not speed up the rusting process of your fence. "glyphosate (C3H8NO5P)" as you mentioned is not an oxidizing agent and "rusting" is "oxidizing process of iron particles on the surface".