Stailess Steel rudder?

Discussion in 'Boat Design' started by hargadoo, Jun 1, 2009.

  1. BertKu
    Joined: May 2009
    Posts: 2,521
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Hi Lewisboat and Mercury,

    Have I understood you both correctly, should hardagoo and I, make a ss 316L rudder and have it powdercoated with a nice white paint, if the boat is also a nice white colour, I will have problems at a later stage, because I seal the surface of the SS316L and the chromium can't breath. Good that I read this thread, I would have blindly gone through the expenses and had it powdercoated. Thank you so much for the information provided.
  2. Mercury
    Joined: Jun 2009
    Posts: 24
    Likes: 1, Points: 0, Legacy Rep: 34
    Location: California

    Mercury Mercury

    Stainless coating

    Hello all,

    I found the link on Youtube please see

    I think you will get a better idea than I can describe in written form. Please note the coating had not been polished in any way, was simply coated and placed in the water where it remained for slightly over ten months. had the coating been polished to say a satin finish the result would have been the same (no corrosion).

    Hope the above link helps.
  3. apex1

    apex1 Guest

    No, sorry it cannot help. The question was to replace a GRP rudder with a SS made one. In this case every coating is nonsense and leads to crevice corrosion.

    Leave it!
  4. Mercury
    Joined: Jun 2009
    Posts: 24
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    Location: California

    Mercury Mercury

    why is that people do not read before opening their mouths

    Dear Ms/Mr. leave it.

    If you took the time to read the thread the question was posed to me directly about the potential of reducing the weight of existing Stainless steel rudders, each weighing 60 LBS. My reference was to perhaps replace the SS rudders with a lighter weight substrate and if still wanting to have the appearance of SS then it could be coated with what has been proven to work for many years, with zero crevice corrosion. It is used on Ocean going tankers for at least ten years. So, I suggest before climbing all over someone who was asked for advice and gave it humbly, you take the time to read.

    I will not post again as this type of BS is not worth my time.

  5. apex1

    apex1 Guest

    Nice! least you have choosen the right board name:p

    And you have NOT being asked to post that nonsense as a reply on the original question:
    all clear?

    leave it!
  6. lewisboats
    Joined: Oct 2002
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    Location: Iowa

    lewisboats Obsessed Member

    Mercury...if you re-read the original post...he was asking about making a Stainless steel rudder which would weigh less than the laminated one he has now which weighs 150 lbs. A hollow Stainless rudder would weigh significantly less than that. No need to get into a beef with folks especially if you misunderstood the original poster's intent. I believe you mistook ChrisN67's post as the original...please go back and reread the OP.

  7. Mercury
    Joined: Jun 2009
    Posts: 24
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    Location: California

    Mercury Mercury


    Thanks lewisboats for clarification. My intent was to indicate an alternate potential for keeping the look and properties of stainless steel while drastically reducing weight. I am attaching (hope it works) images of a rudder from a two racing yachts which were coated with SS 316L and then polished. The original rudders were fiberglass and was prepped just the same as one would prep for paint. The SS was sprayed on using an automotive spray gun and added approx. 50 grams per sq foot of weight when complete. The owners of the vessels have stated they are enjoying great success with maneuvering in light winds.

    Attached Files:

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