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    Aluminum Zincs-gctid800890

    Hi, My Zincs dont last a year, due to my marina I think. Apparently alluminum lasts 30% longer with the same protection. Could you share your experiences with me please.

    Thanks Bruce

    #2
    My port trim tab got ate up last year because my next door boat had not had the zincs replaced for 5 years, she is gone now, thank god.

    The one year I did not hang a transom zinc between us.

    Have you checked your bonding system?
    Pat says: DO-IT-RIGHT THE FIRST TIME!

    Bayliner 3870 "ALASKA33)
    Twin 350 GM power
    Located in Seward, AK
    Retired marine surveyor

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      #3
      "Bruster52" post=800890 wrote:
      Hi, My Zincs dont last a year, due to my marina I think. Apparently alluminum lasts 30% longer with the same protection.
      That's incorrect. "Lasting longer" and "same protection" are inverse. An anode provides protection by being dissolved away by electrolysis. If it's not being eaten away, it's not protecting you're more noble metals. It's the DC current produced by the dissolving anode that counteracts the current of your dissolving stainless bits.

      It's all about ion flow and keeping the reduction on your sacrificial anodes, rather than those more expensive bits.
      Custom CNC Design And Dash Panels

      iBoatNW

      1980 CHB Europa 42 Trawler- "Honey Badger"

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        #4
        Here's a great article explaining the differnt anodes, applications and how to test for corrosion (video).

        http://www.boatingmag.com/how-to/cho...rificial-anode

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          #5
          "Bruster52" post=800890 wrote:
          Hi, My Zincs dont last a year, due to my marina I think. Apparently alluminum lasts 30% longer with the same protection. Could you share your experiences with me please.

          Thanks Bruce
          I see you're in Qualicum Beach so if your boat is there it will be moored in salt water. I think Zinc would be your best choice for anodes. Aluminum is more for brackish water which is fresh and salt water. We moor a little up the Fraser River so we run aluminum anodes.
          Sea Venture
          2000 3055, 5.7/B2, 18x23" props
          Cruising the PNW and beyond.
          DIYC, Riverhouse Marina
          MMSI 316029971

          Kirk
          Drinks well with others.

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            #6
            "SprinterX" post=800984 wrote:
            I think Zinc would be your best choice for anodes. Aluminum is more for brackish water which is fresh and salt water. We moor a little up the Fraser River so we run aluminum anodes.
            https://imageshack.com/i/poEM6LRZj w....jpg[/IMG]

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              #7
              Thanks I am aware of this. Appreciate your input.Just trying to slow it down to once a year.

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                #8
                Thanks I found this chart on Martyrs site I think

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                  #9
                  I only use Martyrs...best premium grade.

                  Aluminum anodes for all Mercruiser stern drive.

                  What you got 3988 ? Then yes Zinc would be your best choice.
                  Joon, Kathy, Jaden & Tristan
                  Uniflite 42 AC, DD 671N
                  93 3058 sold
                  92 2855 (day boat)
                  91 Fourwinns 205 (lake boat)
                  Longbranch WA
                  Life is Good

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                    #10
                    "Bruster52" post=801100 wrote:
                    Thanks I am aware of this. Appreciate your input.Just trying to slow it down to once a year.
                    Add more/larger anodes.
                    Jeff & Tara (And Ginger too)
                    Lake Havasu City, AZ
                    |
                    Current: 2008 Playcraft 2400 MCM 350 Mag B3
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                    And 12 others...
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                      #11
                      Agree. Don't change the type. If you're trying to stretch them out, get a couple of zinc fish to hang over the sides.


                      Custom CNC Design And Dash Panels

                      iBoatNW

                      1980 CHB Europa 42 Trawler- "Honey Badger"

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