Why coating is crutial for Al Masts?

Discussion in 'Materials' started by metin_mehel, Jan 3, 2014.

  1. rainmaking
    Joined: Jan 2014
    Posts: 34
    Likes: 1, Points: 0, Legacy Rep: 13
    Location: Florida

    rainmaking Junior Member

    Anodize is generally more corrosion resistant than most alodine type coatings, however; should corrosion present itself on an alodine treated part it can easily be cleaned and touched up. Unless you have a good solution for anodize I would go for the alodine.

    As for the stainless, it has galvanic potential with aluminum. It's not good practice to mate the two on a boat without insulating layers between. Products like tef-gel will help keep salt-water (dielectric) from getting between them but it is really best to separate them with plastic or fiber washers or similar.

    goood luck!!

  2. Steve W
    Joined: Jul 2004
    Posts: 1,825
    Likes: 63, Points: 48, Legacy Rep: 608
    Location: Duluth, Minnesota

    Steve W Senior Member

    You should probably be using ss or monel rivets coated with something like Tef gel ,aluminum rivets are not very strong. Or you can drill and tap and use machine screws.
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.