need a bit of advice
Submitted by petermac on Mon, 2013-07-01 18:33
I bought some stuff at my local boat shop that is supposed to prevent corrosion/electrolysis between different materials such as stainless steel and ali. when I bought this stuff it cost $28 for a syringe of it and they told me it would develop a skin but wouldn't completely harden. I coated the s/s screws when I mounted my new radio but it is still tacky after 5 days. can any 1 recommend any thing else
.thumbnail.jpg "D 1's PB Coral Trout")
catchalittle
Posts: 1875
Date Joined: 04/09/08
Was it called duralac?
Was it called duralac?
Nathan
petermac
Posts: 2946
Date Joined: 03/03/10
cant find
cant find the syringe so cant say did you get my message I sent to you attached to the pic of my KGW
catchalittle
Posts: 1875
Date Joined: 04/09/08
nope didnt get it
nope didnt get it
if its yellow paste it should be duralac and it does take awhile for it to go off. very useful stuff and a tube will last you for ages and save you a few dramas when putting anything stainless next to ali
Nathan
petermac
Posts: 2946
Date Joined: 03/03/10
this stuff
this stuff is white what I said in my other message was I will try and pick that tackle tomorrow and as I have a medical appointment on Wednesday I will try and drop it to you Thursday and there is no rush for the rigs just when you can
Tank
Posts: 358
Date Joined: 12/05/12
Counter question
How would battery terminal spray work in this sort of situation...ideas?
petermac
Posts: 2946
Date Joined: 03/03/10
we used
we used to spray the battery terminals on the nav aids in Hampton harbour but stoped as it caused us more grief as all sort of crap would stick to it I am starting to think denso tape messy to apply but works good I have opened up elecy connections that were made 20 years previous and because they were covered in denso looked brand new
Swompa
Posts: 3901
Date Joined: 14/10/12
Duralac is good, but it can
Duralac is good, but it can make a effin mess.
iana
Posts: 652
Date Joined: 21/09/09
Duralac
Had a bit of a look on the net for Duralac. Didn't find much, they say a corrosion preventative between dissimilar metals. I thought it was developed pre ww2 as a sealant between alloy sheets on seaplanes. It says it is a aviation development, and I did use it while in the trade, but not much.
My thoughts are that it would be better to have a common bonding wire from the (ground) chassis or structure from all your electrical components, as well as and including fuel lines, tanks etc. Then forget about all the compounds sales person try to sell you.
Sandgroper-WA
Posts: 125
Date Joined: 27/02/11
If you only used one type of
If you only used one type of metal for the entire boat then what you said would be fine. However the issue is when you have different types of metal in contact with each other they corrode at a much higher rate. http://en.wikipedia.org/wiki/Galvanic_corrosion
Really it's a false economy to look at the price of a tube of Duralac, so far my tube has lasted 2 years and it's still going strong. If you start putting any SS screws into an Ali boat if you don't use it you will see paint bubbling and peeling pretty quickly, or visible signs of corrosion within 12 months.
Yes it can be a bit messy but if you, pre drill your holes, then tap the hole - or screw the SS in then out, then coat the screw in Duralac by dipping the screw in the tube, then screw it in for the final time you will create very little mess. If you also have a rag on hand that also helps.
Guardy
Posts: 381
Date Joined: 09/08/12
Could be a product called Tefgel
Have a look on the Internet. It's supposed to be pretty good and does stay tacky for ages.
petermac
Posts: 2946
Date Joined: 03/03/10
tefgel
found the syringe I bought and that's the stuff tefgel
Rig
Posts: 2925
Date Joined: 27/12/06
tef gel
Yep it sounds like the stuff I have in a syringe called tefgel. works pretty well for me and as its white it looks better on a white boat as compared to yellow like duralac. I was told duralac was carcenegenic and tefgel isnt, either way they will both work but if you can insulate different metals with rubber or use aluminium rivets instead of ss screws this will also help
Guardy
Posts: 381
Date Joined: 09/08/12
Expensive
Stuff