Rusting prop
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Rusting prop

  1. #1
    Senior Member f_inscreenname's Avatar
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    Default Rusting prop

    I've been dealing with a couple of steel props prop testing my Biesemeyer. The water I run in is brackish but the prop in the picture was put on the boat, run for about an hour and when I got back to the house (2 blocks from the ramp) it was already rusty. What can I do? Paint it? Chrome it? Could it still be re-piched later if chromed?

    A winner is just a loser that got up and did it one more time.
    1959 Biesemeyer - 4pt Hydro Drag - 2013 ACBS Winner - Best Race Boat
    1966 Donzi 16
    1967 Nova Marine - SuperNova24 - ACBS Winner - 2012 Best Race Boat - 2016 Peoples Choice & Best Non Wood
    1972 John Allmand - Nova 19
    1982 PolarKraft -Jonboat - Crab Killer

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    Here is my opinion,chrome should not be an option it causes hydrogen embrittlement, thats why its not allowed in racing.All I do is pull it and use wd40 and scotchbrite.The other option is to use speed coat(graphite spray)but it will still rust .its easier to pull and remove the rust.Of course if your boat stays on the trailer like mine it never needs cleaning.

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    Senior Member Franger's Avatar
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    I spray the prop front and back with WD40 as soon as the boat is out of the water, doesn't rust

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    Senior Member f_inscreenname's Avatar
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    So that's it, just keep spraying it down. I guess that's what I have to do.
    A winner is just a loser that got up and did it one more time.
    1959 Biesemeyer - 4pt Hydro Drag - 2013 ACBS Winner - Best Race Boat
    1966 Donzi 16
    1967 Nova Marine - SuperNova24 - ACBS Winner - 2012 Best Race Boat - 2016 Peoples Choice & Best Non Wood
    1972 John Allmand - Nova 19
    1982 PolarKraft -Jonboat - Crab Killer

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    Senior Member PropWorks West's Avatar
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    You can polish the propeller, that will help seal the steel as best as possible, it will rust less but you will still need to spray it with wd or something, You should pull the propeller when you trailer it, so you can easly clean it when its off the boat. Thats what I do with my propeller.
    Also inspect it for nicks or dings on the leading and trailing edges, if left unatended, they can develop into cracks
    (i leave my propeller on if im only traveling a couple of blocks)
    Last edited by PropWorks West; 10-12-2014 at 07:58 PM.

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    Use Marvel Mystery Oil. Lasts much longer and protects better than WD-40.

  10. #8
    Senior Member f_inscreenname's Avatar
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    Thanks for the ideas. I did polish and wax it before running it the one time. Didn't help. I also hate the idea of having to install and pull the prop every time I want to use the boat.
    So chrome is out because of "hydrogen embrittlement". Would that also go for brass, copper or nickel? Also just asking here .... what about painting it? Most aluminum props are painted. I'm sure it will come off at some point but it seems like it would hold up better then wd-40.
    A winner is just a loser that got up and did it one more time.
    1959 Biesemeyer - 4pt Hydro Drag - 2013 ACBS Winner - Best Race Boat
    1966 Donzi 16
    1967 Nova Marine - SuperNova24 - ACBS Winner - 2012 Best Race Boat - 2016 Peoples Choice & Best Non Wood
    1972 John Allmand - Nova 19
    1982 PolarKraft -Jonboat - Crab Killer

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    I have seen props sprayed with Liquid Galvanizing. It comes in a spray can. Not too pretty, but it holds up fairly well. I believe that you can buy it at Lowes.

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    Default Passivate

    You will not be able to stop the rust, but only control it! Use Muraic Acid to remove the rust. If you have, or can get Nitric acid use after
    the first acid and this will passivate the stainless and give you better rust prevention... If the prop is 316 stainless this should help!

  13. #11
    Some guys never learn. bocco's Avatar
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    I had a steel prop nickle plated and it worked pretty well. One small rock chip and it will peal from the water pressure. If you're care full you might get 2 years before re plating.

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    Senior Member SoldHondaBoughtHondo's Avatar
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    "Metal Prep" get it at a body shop supply store...as long as the government hasnt messed with the phos acid content it will do the deed

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    Or Seth, either one Budweiser's Avatar
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    Quote Originally Posted by f_inscreenname View Post
    ...Would that also go for brass, copper or nickel?
    I had wondered about copper plating. Pretty easy to do at home... according to YouTube anyway. If I recall correctly, there is an issue with Stainless and plating it with copper, but don't remember why or if it was only certain grades of stainless.
    Last edited by Budweiser; 06-27-2017 at 01:18 PM.

  16. #14
    a.k.a. "Mean Pair" Nice Pair's Avatar
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    Quote Originally Posted by Budweiser View Post
    I had wondered about copper plating. Pretty easy to do at home... according to YouTube anyway. If I recall correctly, there is an issue with Stainless and plating it with copper, but don't remember why or if it was only certain grades of stainless.




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