Re: Stus-List Galvanic corrosion

Hey Everyone Just wanted to say thanks for all the feedback. I have a lot to digest and more testing, but I’m on island time so I’ll get to it eventually. Thanks Mike PERSUASION C&C 37 K/CB Long Sault > On Aug 15, 2018, at 1:11 PM, Chuck Gilchrest via CnC-List > wrote: > > > Joe, > It is

Re: Stus-List Galvanic corrosion

have even occurred to me. From: Della Barba, Joe via CnC-List Sent: Wednesday, August 15, 2018 11:40 AM To: mailto:cnc-list@cnc-list.com Cc: Della Barba, Joe Subject: Re: Stus-List Galvanic corrosion I am not sure I understand the mechanism of a bronze thru-hull in a fiberglass boat connected

Re: Stus-List Galvanic corrosion

Joe, It is the stray electric current through the water which can be caused by metals on other boat in the vicinity or poor grounds on shore power in a marina. Salt water added to two dissimilar metals makes for a great battery. Chuck Gilchrest ___ T

Re: Stus-List Galvanic corrosion

I am not sure I understand the mechanism of a bronze thru-hull in a fiberglass boat connected to a rubber hose suffering electrically caused corrosion. Possible ideas: 1. Copper in bottom paint is conducting enough to cause issues. 2. There is current in the bilge water that is carryin

Re: Stus-List Galvanic Corrosion

Erie, PAanimated_favicon1 From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of ALAN BERGEN via CnC-List Sent: Tuesday, August 14, 2018 7:04 PM To: C&C Cc: ALAN BERGEN Subject: Stus-List Galvanic Corrosion Since you are in fresh water, use aluminum anodes, not zinc. Is your ground bus, be

Re: Stus-List Galvanic Corrosion

Yes that is how it is set up. Mike PERSUASION C&C 37 K/CB Long Sault > On Aug 14, 2018, at 7:03 PM, ALAN BERGEN via CnC-List > wrote: > > Since you are in fresh water, use aluminum anodes, not zinc. > > Is your ground bus, behind the electrical panel, connected to the engine. > All of your

Stus-List Galvanic Corrosion

Since you are in fresh water, use aluminum anodes, not zinc. Is your ground bus, behind the electrical panel, connected to the engine. All of your instruments should have their negative leads going to the electrical panel ground bus. Then the ground bus should be connected to the engine block. A

Re: Stus-List Galvanic corrosion

I wavered in confusion too and landed on the side of not bolding.On the West Marine Advisor website they have reprinted a Practical Sailor article written by Stan Honey. I include the link below. It is a good read. Under the section on “Bonding and Electrolytic Corrosion”, the first sente

Re: Stus-List Galvanic corrosion

>> >> >> Could really use some help from any electricians or corrosions specialist >> out there. >> >> >> >> >> >> Mike >> C&C 37 K/CB Shoal draft >> Persuasion >> Stormont Yacht Club >> >>

Re: Stus-List Galvanic corrosion

The reason to ground them is to prevent lightning flashovers. IMHO this is outweighed by the corrosion issues caused by this wiring. Joe Della Barba Coquina From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Don Kern via CnC-List Sent: Tuesday, August 14, 2018 3:06 PM To: cnc

Re: Stus-List Galvanic corrosion

I was mainly answering Mike but adding to your question also. I am not clear on what is being measured, assumed something to ship's ground. I have not understood the need to ground an otherwise electrically isolated bronze through hull or seacock though I think at one point it was recommended.

Re: Stus-List Galvanic corrosion (Della Barba, Joe)

You could try reading current with your multimeter instead of voltage. Small stray voltages likely exist when measuring between lead and SS even in fresh water but I doubt they will sustain much current. Just as an example of magnitude very roughly if there was a current of 1 amp continuously

Re: Stus-List Galvanic corrosion

> *Sent:* Tuesday, August 14, 2018 12:21 PM > *To:* cnc-list@cnc-list.com > *Cc:* David Castor > *Subject:* [EXTERNAL] Re: Stus-List Galvanic corrosion > > > > Normally a lurker on this list, since I don't own a C&C, but thought I'd > post this link

Re: Stus-List Galvanic corrosion

Castor Subject: [EXTERNAL] Re: Stus-List Galvanic corrosion Normally a lurker on this list, since I don't own a C&C, but thought I'd post this link to a paper on corrosion issues by Stan Honey. http://honeynav.com/grounding-on-sailboats/ West Marine has a version of this on their

Re: Stus-List Galvanic corrosion

ht >> be creating some kind of battery but my memory might be tricking me. >> >> >> >> Could really use some help from any electricians or corrosions specialist >> out there. >> >> >> >> >> >> Mike >> C&C 37 K/CB Shoal draf

Re: Stus-List Galvanic corrosion

on > Stormont Yacht Club > > > > *From: *ALAN BERGEN via CnC-List > *Sent: *August 9, 2018 5:23 PM > *To: *C&C > *Cc: *ALAN BERGEN > *Subject: *Re: Stus-List Galvanic corrosion > > > > You can use aluminum anodes in fresh water. That's what I use.

Re: Stus-List Galvanic corrosion

8 10:04 AM To: cnc-list@cnc-list.com Cc: Della Barba, Joe Subject: Re: Stus-List Galvanic corrosion You can have grounds places you don’t expect. The VHF radio may ground negative to the chassis that connects to the coax shield that connects to the body of the antenna loading coil that connects to

Re: Stus-List Galvanic corrosion

battery but my memory might be tricking me. Could really use some help from any electricians or corrosions specialist out there. Mike C&C 37 K/CB Shoal draft Persuasion Stormont Yacht Club From: ALAN BERGEN via CnC-List Sent: August 9, 2018 5:23 PM To: C&C Cc: ALAN BERGEN Subject: Re: S

Re: Stus-List Galvanic corrosion

PM To: cnc-list@cnc-list.com Cc: Persuasion37 Subject: [EXTERNAL] Re: Stus-List Galvanic corrosion Thanks Joe I think I’m suffering from stray current corrosion. I’m on a ball at the yacht club and as said earlier, the only time I’m connected to AC is when Persuasion is on the hard. I’ve

Re: Stus-List Galvanic corrosion

I have a shaft coupler from PYI (R&D marine?)... Anyway, they provide a "solution" of installing a jumper between coupling bolts to provide a ground path. They state the purpose as being "if needed". I have had a hard time getting straight scientific answer as to when "if needed" applies. Some p

Re: Stus-List Galvanic corrosion

Thanks Joe I think I’m suffering from stray current corrosion. I’m on a ball at the yacht club and as said earlier, the only time I’m connected to AC is when Persuasion is on the hard. I’ve started eliminating different devices looking for the leak. A very slow process. Mike PERSUASION C&C

Re: Stus-List Galvanic corrosion

able to check what >>> metal it is made from (it should be stamped on it). >>> >>> Marek >>> >>> From: Persuasion37 via CnC-List >>> Sent: Friday, August 10, 2018 12:44 >>> To: cnc-list@cnc-list.com >>> Cc: Persuasion37 &g

Re: Stus-List Galvanic corrosion

We are docked next to quite a few derelict boats connected to shore power and for that main reason, I installed a galvanic isolator. *ProMariner ProSafe FS Galvanic Isolator - 30 Amp*

Re: Stus-List Galvanic corrosion

I am a bit late to this, but FYI: Galvanic corrosion is caused by two different types of metal in water that are electrically connected. The “less noble” metal is the one that corrodes, which is why we use zincs (or magnesium or aluminum). There has to be a path between the metals for this to hap

Re: Stus-List Galvanic corrosion

you have direct access to one, you should be able to check what > metal it is made from (it should be stamped on it). > > Marek > > *From:* Persuasion37 via CnC-List > *Sent:* Friday, August 10, 2018 12:44 > *To:* cnc-list@cnc-list.com > *Cc:* Persuasion37 > *Subject:*

Re: Stus-List Galvanic corrosion

-List > Sent: Friday, August 10, 2018 12:44 > To: cnc-list@cnc-list.com > Cc: Persuasion37 > Subject: Re: Stus-List Galvanic corrosion > > Are you’re right. I was focusing g on prevention and not on protection. > I’ll go to Marine Outfitters and get an anode that I am 100% s

Re: Stus-List Galvanic corrosion

(it should be stamped on it). Marek From: Persuasion37 via CnC-List Sent: Friday, August 10, 2018 12:44 To: cnc-list@cnc-list.com Cc: Persuasion37 Subject: Re: Stus-List Galvanic corrosion Are you’re right. I was focusing g on prevention and not on protection. I’ll go to Marine Outfitters and

Re: Stus-List Galvanic corrosion

; Date: 2018-08-09 20:10 (GMT-05:00) > To: cnc-list@cnc-list.com > Cc: Mike > Subject: Re: Stus-List Galvanic corrosion > > Marek you are right one should never ass/u/me. > > Whether the anode is the correct one or not it would not produce stray > electrons. Right? &

Re: Stus-List Galvanic corrosion

18 3:56 PM To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: Marek Dziedzic<mailto:dziedzi...@hotmail.com> Subject: Re: Stus-List Galvanic corrosion Mike, I would not assume anything, unless you know what you ordered. They sell both zinc and magnesium anodes. IIRC, when I wa

Re: Stus-List Galvanic corrosion

m Cc: Marek Dziedzic Subject: Re: Stus-List Galvanic corrosion Mike, I would not assume anything, unless you know what you ordered. They sell both zinc and magnesium anodes. IIRC, when I was buying mine (4 years ago?), they did not have magnesium and I ended up ordering it online. Marek 1994 C270 ”Le

Re: Stus-List Galvanic corrosion

You can use aluminum anodes in fresh water. That's what I use. They're cheaper than magnesium. To test for stray currents, borrow a clamp on ammeter. Then check the AC line supply for your boat, and for the boats in nearby slips. The ammeter should read zero amps. Use the lowest scale, as str

Re: Stus-List Galvanic corrosion

Persuasion37 via CnC-List Sent: Thursday, August 9, 2018 15:33 To: cnc-list@cnc-list.com Cc: Persuasion37 Subject: Re: Stus-List Galvanic corrosion I’m not sure. I bought them at The Chandlery in Ottawa. I assume they are for fresh water. Mike PERSUASION C&C 37 K/CB Long S

Re: Stus-List Galvanic corrosion

gt; Marek > > From: CnC-List On Behalf Of Mike Taylor via > CnC-List > Sent: Thursday, August 9, 2018 09:01 > To: cnc-list@cnc-list.com > Cc: Mike Taylor > Subject: Re: Stus-List Galvanic corrosion > > Hi Bob > > I started the season with 1.5 anodes. I’m

Re: Stus-List Galvanic corrosion

Mike, Just to make sure, you use Magnesium anodes, do you? Marek From: CnC-List On Behalf Of Mike Taylor via CnC-List Sent: Thursday, August 9, 2018 09:01 To: cnc-list@cnc-list.com Cc: Mike Taylor Subject: Re: Stus-List Galvanic corrosion Hi Bob I started the season with 1.5 anodes. I’m in

Re: Stus-List Galvanic corrosion

Hi Bob I started the season with 1.5 anodes. I’m in fresh water, Lake Ontario and St. Lawrence river. I believe I have the correct anodes for fresh water. I really don’t want to go the galvanic isolator route Mike > On Aug 9, 2018, at 12:04 AM, Robert Boyer via CnC-List > wrote: > > What

Re: Stus-List Galvanic corrosion

What is the condition of your shaft zincs? Are you in fresh water or salt water & do you have the correct zincs for the type of water your boats in? Sounds like you may need a galvanic isolator... Bob Bob Boyer S/V Rainy Days (1983 C&C Landfall 38 - Hull #230) Blog: dainyrays.blogspot.com Emai

Stus-List Galvanic corrosion

Hey folks I’m looking for some help. Persuasion is suffering from galvanic corrosion or stray current corrosion or something. When I connect a multi meter, ground to engine and positive lead to various place like keel bolt, mast and through hull I see ~0.5V. Today I changed out the controll