Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
(OP)
There are conflicting information in the net about the weldability of galvalume (aluminum-zinc coated) products like C-purlins (1.5mm thickeness). I'd like information about their weldability from actual hand-ons or knowledge.
For a 1.5mm galvalume coated C-purlin.. What is the thickness of the coating? Thank you.
For a 1.5mm galvalume coated C-purlin.. What is the thickness of the coating? Thank you.






RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
Good luck,
Dave
Thaidavid
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
What is the difference in appearance between galvalume purlins and galvanized purlins? Can galvalume be made into 1.5mm thickness producing C-purlins?
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
I also read that galvalume can't be used with concrete, mortal or cement board.. the application of the purlins would be supporting cement board.. the reason being it has to do with the alkaline nature of these reacting with the aluminum. Supposed the galvalume purlins support cement board.. would the part that corrode only the aluminum-zinc coating making the coating vanish or will it eat thru the bare steel inside even if it's not wet? Are corrosion contagious enough to infect the whole material inside even without the presence of water?
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
For 1.5mm that is not thin gauge.. does it still requires very knowledgeable welder.
Can one also sandpaper away the zincs before applying welding.. in appearance, how exactly can you the difference between the two (see my comment on previous message to this too)
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability
Thanks for the tips that it takes higher current to weld galvanized steel... we just returned all delivery of the galvanized purlins and ordered bare steel.
I need to know something. What is the effect of rust primer on the bare steel in welding? Does it have the same effect of needing higher current.. this is for both red oxide rust primer and epoxy primer. Should steel be primered only after they are soldered? Thank you for all the assistance.
RE: Galvalume (Aluminum-Zinc coated) C-Purlins Weldability