Is this the cause of electrolysis

hey guys,

 

after doing slme reading and getting paranoid now im

curious if these spots on the bottom of the hull is a cause of electrolysis. I bought this boat after it was sitting in someone’s backyard for around 6 years and had this in there where I bought it. Help would be great also how do I remove it too :) 

 

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sunshine's picture

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Date Joined: 03/03/09

Looks more like tiny stone chip damage

Mon, 2019-12-09 13:59

Does the pitting reduce as you head further back on the hull if so this would pretty much confirm that conclusion.  

Posts: 291

Date Joined: 22/05/19

 Nah it’s literally all over

Mon, 2019-12-09 14:39

 Nah it’s literally all over the bottom of the hull. I thought it was just salt crystal build ups nah nah. Might get some salt away on it and see if that works. But it’s not localised to one area 

uncle's picture

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Date Joined: 10/02/07

Electrois in my old tub that was once sank

Mon, 2019-12-09 15:00

 Causes holes to be eaten thru the hull.you probably  need marineline or someone to check it out.

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all aggressive fish love bigjohnsjigs

Posts: 291

Date Joined: 22/05/19

 Yeah I understand what

Mon, 2019-12-09 15:42

 Yeah I understand what electrolysis is but thought it was only segregated to “normally” a single area on plate hills not spread all the way through.

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Date Joined: 09/03/13

 run you fingernail over it

Mon, 2019-12-09 16:20

 run you fingernail over it if you get a small amout of "white rust" (looks and feels like a salt build up) then it is electrolysis.

 

areas like in your pic are usually only formed when the boat has a stray current IE some wiring is faulty and has earthed to the frame.  Multimeter time.

 

do you have a SS prop ?   if so is it getting pitted?

 

Posts: 291

Date Joined: 22/05/19

 Yeah stainless steel. It’s a

Mon, 2019-12-09 17:02

 Yeah stainless steel. It’s a brand new engine on it so can’t tell atm. Bought the hull second hand so possible did ages ago def doesn’t anymkre though 

Posts: 1522

Date Joined: 09/03/13

usually the SS prop is the

Mon, 2019-12-09 18:18

usually the SS prop is the first to show a stray current.  will turn white in a day of boating.  but if the current and wiring has been sorted you may need to just treat the affedted area.  (google)

 

corrosion is caused by contamination with another metal (sinkers, iron fillings, etc), a build up of gunk (alge etc in the bilge) .....both of these localise to a specific area and of course start from the inside out.  To combat this its a good idea to put some boatwash in the bilge at the ramp (bung in) put 20-50 l fresh water in and drive it home .....then rise at home.  do this every now an then.  

but if you have corrosion starting on the outside it's almost always stray current.  (I guess.. was ...in your case)  

Swompa's picture

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Date Joined: 14/10/12

 In a word, yes.

Mon, 2019-12-09 19:14

 In a word, yes.

rob90's picture

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Date Joined: 06/02/13

 Up for sale again? 

Wed, 2019-12-11 09:33

 Up for sale again? Ad says 2.6m beam so cant be legally towed? 

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 Hi my name is rob............. and I'm a........... fishaholic

Darren253's picture

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looks like it...

Wed, 2019-12-11 11:07

Posts: 291

Date Joined: 22/05/19

Fat fingered it 

Wed, 2019-12-11 12:33

Fat fingered it 

Posts: 291

Date Joined: 22/05/19

Just got some hull acid wash

Wed, 2019-12-11 15:46

Just got some hull acid wash and all clean now. Found out the stabicraft  get this alll the time. But if ally cleaner and happy days 

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Date Joined: 09/12/18

How come

Thu, 2019-12-12 10:13

How come your selling it? Seems like it's just been finished and ready to use for summer ? 

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Date Joined: 22/05/19

 New project !!! Done with

Thu, 2019-12-12 10:56

 New project !!! Done with this one. Now after another.