Impressed current cathodic protection (ICCP) for aluminum multihull

Discussion in 'Multihulls' started by yanivmass, Nov 8, 2020.

  1. yanivmass
    Joined: Jun 2013
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    yanivmass Junior Member

    I am currently under construction of an +- 20 m long / 10 m width aluminum sail cat.
    Going threw the different companies suggesting ICCP systems, I received an offer that include 1 set (one impressed anode and one reference cell) to be installed on one hull out of the two only.
    ill appreciate to hear any thots regarding the right layout of an ICCP system on aluminum cat's.
    thank you.
     
  2. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

  3. Will Gilmore
    Joined: Aug 2017
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    Location: Littleton, nh

    Will Gilmore Senior Member

    Is that an anti-cathodic system or an anti-fouling system. Admittedly, I didn't read the whole site, but I saw nothing that suggested that system would reduce corrosion. In fact, because moving and disturbed electrolytics can increase corrosion rates, that systems sounds like it might be hard on aluminum hulls.

    My understanding is that ICCP is the preferred choice for larger ships, but it requires constant monitoring of the charge levels at the cathode and anode ends.

    You might also look into zinc paints that can provide a sacrificial layer.

    The National Association of Corrosion Engineers has a lot of resources availible, as well as certification courses and connections to corrosion professionals.
    Marine Coating Technology https://www.nace.org/education/courses-by-program/coating-inspector-program/marine-coating-technology

    -Will (Dragonfly)
     

  4. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

    It is kind of both...really depending upon what you are trying to achieve...but it is more anti-fouling.
    It is unclear from the OPs enquiry whether they want a localised (dissimilar metals) or ship-wide (anti-fouling) effect...
     
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