Crevice corrosion will be an issue in 20-30 years. On a 30 year old boat, I would not worry about it.
Joel 35/3 Annapolis On Mon, May 6, 2013 at 4:55 PM, djhaug...@juno.com <djhaug...@juno.com>wrote: > Okay, > > so, any opinions on Bronze wood screws vs SS and if SS 304 or 316. It > seems the 316 is bit more brittle. 304 is less corrosion resistant but > stronger and the bronze offers strength and corrosion resistance but is > more money... > > Then there is that little issue that SS has when it gets no oxygen, > Crevice corrosion I believe is the term. Isn't that an issue where the > screw penetrates the deck? > > Is that about right? > > It looks like 304, for example #14 x 2" is about $60 for 100 and 316 is > about $75- $80 and the bronze goes up to $95... > > Danny > > > ---------- Original Message ---------- > From: Martin DeYoung <mdeyo...@deyoungmfg.com> > To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> > Subject: Re: Stus-List Installing teak handrails > Date: Fri, 3 May 2013 17:02:46 +0000 > > If you have balsa cored decks the extra time to seal the bolt hole with > epoxy is a good investment. > > Martin > Calypso > 1970 C&C 43 > Seattle > > > -----Original Message----- > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of > djhaug...@juno.com > Sent: Friday, May 03, 2013 6:38 AM > To: cnc-list@cnc-list.com > Subject: Stus-List Installing teak handrails > > Hello again, > > As i'm getting closer to installing my new handrails, I have grown concern > regarding the bedding compound. My old handrails were lag screwed from the > bottom. I like this approach as it makes installing finished handrails a > much less time consuming job. There would be no need for plugging, sanding > and re-finishing the plugs after installation. I wanted to re-bed them > using the method described on > http://www.pbase.com/mainecruising/rebedding_hardware. However, the more > I think about it, using the Butyl tape doesn't lend itself very well to > using lag screws. It seems to me you don't want the bolt/screw turning, as > it would grab the Butyl and pull it out of place. You know, that stuff > likes to stick to itself and everything else. > > Wouldn't turning the lag bolt mess up the nice cone shaped blob you place > for the countersink area? > > ... Am I overthinking this? > > ...should I go back to jolly 'ol 5200? > > ...should I reconsider through bolts and plugs and then have to deal with > refinishing the plug areas. I wouldn't mind but, the need to re-coat 8 > times at 1 time per 24hrs really makes it tedious. Especially, when it > takes me 40 minutes to get to the boat. Thats not much fun after work > every day. 1 1/2 driving for 20 minutes of coating, not to mention the > gas...LOL > > As always, I appreciate any and all opinions and insights, > > Danny > Lolita > 1973 Viking 33 > Westport Point, MA > > _______________________________________________ > This List is provided by the C&C Photo Album http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > > _______________________________________________ > This List is provided by the C&C Photo Album > http://www.cncphotoalbum.com > CnC-List@cnc-list.com > -- Joel 301 541 8551
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