Stainless Screws
03-01-2014, 03:28 PM
#1
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Stainless Screws
Is there an increased risk of galvanic corrosion using stainless screws in the body of my XJ? e.g. door sill plates and other areas prone to moisture.
03-01-2014, 03:38 PM
#2
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Location: Canton, MI
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Year: 1999
Model: Cherokee
Engine: 4.0
I don't know about the risk of galvanic action but I replaced all my external screws on my lift gate, headlights, door sills, and other places I could get away with using stainless steel non-structural fasteners. I also replaced fasteners under the chassis with SS fasteners.
Last edited by CCKen; 03-01-2014 at 04:11 PM.
03-02-2014, 10:47 AM
#4
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Year: 1998 Sport
Model: Cherokee
Engine: 4.0
I also have never had an issue and every time I need to replace a nut or bolt for a part that I may have to replace or remove I try to use stainless.
03-02-2014, 10:56 AM
#5
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Year: 1989 Laredo
Model: Cherokee
Engine: 4.0 L 6 Renix
No increase in galvanic, there will be a decrease in corrosion. Stainless threads are prone to galling under final tightening; so use an antiseize. 18-8 stainless fasteners will give you a little better than grade 5 conventional steel fasteners for tensile strength, not quite the strength of grade 8. If you have a structural or strength sensitive fastening, use a grade 8 or better (L9) with goldish zinc chromate finish. Quick blast of paint from a spray bomb to finish it off if you really need the anti corrosion. Antiseize is your friend and a favour you do for your self in future maintenance situations. For sheet metal screws I always make stainless our first choice.
03-02-2014, 05:53 PM
#7
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Year: 1988
Model: Cherokee
Engine: AMC242
The metals aren't dissimilar enough to cause trouble (not even with the layer of chromic oxide that forms on the surface.)
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03-02-2014, 07:01 PM
#8
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I'm fortunate to not live in an area prone to any form of environmental corrosion. I'm about 5 miles from the ocean and even when I drive to the snow, they don't use salt in California. That means I have zero rust anywhere except for some of the screw heads which I've been systematically replacing with stainless. Just the trim, thus far, nothing structural.
I just thought I'd ask before continuing with my plan, the screws aren't cheap and I'd feel dumb if I were wasting my money. Thanks for all the info.
I just thought I'd ask before continuing with my plan, the screws aren't cheap and I'd feel dumb if I were wasting my money. Thanks for all the info.
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