Senior Member
Posted 24 October 2017 - 01:26 AM
My advice would be to stay away from stainless unless coating them with a zinc paste. The zinc is sacrificial. Once the zinc coating is gone stainless steel screw with the start to sacrifice the aluminum. Therefore, you will have to recoat them every few years.
You could also use zinc coated steel screws like FWC uses and replace them every few years.
Free Range Human
Posted 24 October 2017 - 02:09 AM
My advice would be to stay away from stainless unless coating them with a zinc paste. The zinc is sacrificial. Once the zinc coating is gone stainless steel screw with the start to sacrifice the aluminum. Therefore, you will have to recoat them every few years.
You could also use zinc coated steel screws like FWC uses and replace them every few years.
I am haunted by waters
Senior Member
Posted 24 October 2017 - 02:40 AM
BTW FWC uses
C1022-grade steel screws with a Climaseal polymer coating over a base coat of non-electrolytically-applied zinc
Doctor Electric
Posted 24 October 2017 - 10:29 PM
BTW FWC uses
C1022-grade steel screws with a Climaseal polymer coating over a base coat of non-electrolytically-applied zinc
whoa, that sounds like something you won't find easily, or ???
Senior Member
Posted 25 October 2017 - 01:39 AM
Riley's Human
Posted 25 October 2017 - 01:53 AM
Just did a quick google and c1022 screws show up on amazon, walmart, grainger etc.
Craig K6JGV_________________________ 2004 2500 CTD 4X4 FWC HAWK 1960 CJ5
Senior Member
Posted 26 October 2017 - 02:24 AM
I saw aluminum metal screws this past weekend, and wondered why I have not seen them mentioned here,
Russ
They won't be strong as steel screws. There are also different aluminum alloys. You would need to chose one that is sacrificial to the aluminum used on the camper skin. I have now idea what alloy of aluminum is used.
As you can see from the chart below Magnesium, Zinc and Beryllium are more anodic than aluminum, thus they get sacrificed during galvanic corrosion.
Bottom line... zinc plated steel screws get used because they are strong and the zinc coating is sacrificial to the aluminum camper skin.
Riley's Human
Posted 26 October 2017 - 05:19 AM
Nice chart, thanks.
Craig K6JGV_________________________ 2004 2500 CTD 4X4 FWC HAWK 1960 CJ5
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