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Thread: galvanic corrosion disialure

  1. #1
    Join Date
    Mar 2018
    Posts
    10

    Default galvanic corrosion disialure

    can welding in different types of metal to a car cause galvanic corrosion?

    Working on a rust repair, I got some stainless, aluminium etc. not sure if i would have issue after it was all painted up or not.

    anyone know the word on galvanic corrosion?

    thanks

  2. #2
    Join Date
    Nov 2013
    Location
    olympia,wa
    Posts
    406

    Default

    you must isolate dissimilar metals or you will have trouble. not such a big deal with stainless on regular steel, but aluminum to steel is bad. paint alone is not enough. i use very thin viton sheet to separate aluminum sheet metal from the steel framing. whatever you use make sure it's not able to absorb water. panel adhesive or two part seam sealer would probably work well too, but be careful in the application process not to tighten things up too soon and squeeze it all out of the joint. loosely assemble, wait for cure, then tighten.
    b marler

  3. #3
    Join Date
    Nov 2005
    Location
    Gresham, OR
    Posts
    257

    Default

    You won't be able to weld steel to aluminum and it takes patience and some technique to weld stainless to mild steel. That said, even riveting the dissimilar metals together will cause corrosion.

  4. #4
    Join Date
    Nov 2005
    Posts
    38,058

    Default

    If the metal isn't "structural" you might want to consider metal bonding which is basically gluing it together with a bonding adhesive designed to do the job.


  5. #5
    Join Date
    Mar 2018
    Posts
    10

    Default

    I got a buddy with years of welding willing to help. I was reading about the glue, just had not had time to look into the products.

    thanks again.

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