Omega Owners Forum

Chat Area => General Discussion Area => Topic started by: Tony H on 26 May 2008, 16:48:43

Title: Brazing zink
Post by: Tony H on 26 May 2008, 16:48:43

Hi all, can anybody tell me if zinc can be successfully brazed? If just snapped off the sacrificial anode on my outboard motor whilst trying to remove the prop :(

Title: Re: Brazing zink
Post by: Auto Addict on 26 May 2008, 17:32:07

I believe it can, but can't remember how :(

Title: Re: Brazing zink
Post by: Tony H on 26 May 2008, 23:27:45

Bump :)

Title: Re: Brazing zink
Post by: Vamps on 26 May 2008, 23:32:49

Deb's will know. ;D

Title: Re: Brazing zink
Post by: Tony H on 26 May 2008, 23:35:48

I await her eagerly await Debs answer :y

Title: Re: Brazing zink
Post by: CaptainZok on 26 May 2008, 23:42:03

Bet MDTM will but he's on holiday this week.

Title: Re: Brazing zink
Post by: sassanach on 27 May 2008, 00:03:35

melting point of zinc =approx 400c
melting point of brass= approx900c
the zinc will be lonnnnnng gone before the braze melts

Title: Re: Brazing zink
Post by: Ken T on 27 May 2008, 00:06:03

I think it could be soldered, but you would have to use an appropriate technique, eg grind back a 45deg "V" and fill up so as to get good side wall fusion, a bit tricky !.  Watch the temps as Sassanach has pointed out.

This might help [ http://www.azom.com/details.asp?ArticleID=2604

Ken

Title: Re: Brazing zink
Post by: sassanach on 27 May 2008, 00:19:33

looking at that website, i think it comes down to what you are going to use as a filler metal.soldering looks more like it here.

Title: Re: Brazing zink
Post by: Debs. on 27 May 2008, 20:35:21

Unless you`ve set your heart on Brazing (i.e: You have hard-brass wire to hand) I would recommend you Silver Solder it using an appropriate S.S/Brazing acid flux: an excellent strength joint with good electrical properties will result and with less risk of conjugant melting points being a problem. :y

Overview:  http://www.1911encyclopedia.org/Brazing_and_soldering

Title: Re: Brazing zink
Post by: STMO123 on 27 May 2008, 20:37:39

Superglue it Tone :y

Title: Re: Brazing zink
Post by: CaptainZok on 27 May 2008, 20:39:40

You're a scouser so obviously the best repair would be to nick somebody elses. ;D ;D

Title: Re: Brazing zink
Post by: STMO123 on 27 May 2008, 20:42:41

Quote

You're a scouser so obviously the best repair would be to nick somebody elses. ;D ;D

Hey you! Tony represents that remark. :)

Title: Re: Brazing zink
Post by: Tony H on 27 May 2008, 20:44:39

Thanks Deb I knew you would have an answer :y Brazing as previously pointed out is not an option due to melting points, do you think a reasonable bond can be achieved using lead solder.
STMO I think the item is too porus to achieve a good bond with superglue

Title: Re: Brazing zink
Post by: Tony H on 27 May 2008, 20:46:28

Quote

You're a scouser so obviously the best repair would be to nick somebody elses. ;D ;D

I thought of that but I couldn't find one compatable ::)

Title: Re: Brazing zink
Post by: STMO123 on 27 May 2008, 20:47:34

Quote

Quote

You're a scouser so obviously the best repair would be to nick somebody elses. ;D ;D

I thought of that but I couldn't find one compatable ::)

Crosby Marina mate. Surely?

Title: Re: Brazing zink
Post by: Tony H on 27 May 2008, 20:56:21

What and get mugged!! :o ;)

Title: Re: Brazing zink
Post by: hotel21 on 27 May 2008, 21:47:32

bolts work, apparently.  Just need to ensure good electrical contact between the surfaces as well as getting it watertight....