Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 30-05-2012, 13:00   #1
Registered User

Join Date: Oct 2011
Location: Wilmington, NC
Boat: Catalina 470
Posts: 25
Stainless Steel Fabrication

I am fabricating a brace for my Bow Sprit/Anchor Roller so that I can run an asymetrical spinnaker. In fabricating the brace I purchased a 7/8" bar and some 2" plate. If I grind or cut the material will I contaminate the stainless? Will it lose it's rust resisting properties? There will be some welding involved. Do I need to coat the finished brace with some kind of wax or solvent to add corrosion resistance?
opwan2002 is offline   Reply With Quote
Old 30-05-2012, 13:51   #2
Senior Cruiser
 
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 38,198
Images: 241
Re: Stainless Steel Fabrication

Unless all ground areas are to be passivated after grinding, the tools used (grinding discs, saw blades etc) must be ‘iron free’, and must not have been used previously on carbon steels.
Discs which are not iron free will impregnate the surface of the stainless with carbon steel, which will produce unsightly rust coloured staining on the stainless. This corrosion product in turn is corrosive to stainless steel, and will initiate attack of the stainless.

Most suppliers of metal working consumables have special ‘iron free’ discs for stainless steels.

You can also perform a simple test to ensure that discs are safe to use on stainless steel. A scrap piece of stainless is dressed with a sample of the candidate discs, then sprayed with tap water and left wet overnight. Satisfactory discs will not produce a rust coloured stain.

If all the ground areas are passivated after grinding, the contaminants introduced by the grinding consumables will be dissolved away, and it is not essential to use iron free discs.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 30-05-2012, 14:24   #3
Registered User
 
leftbrainstuff's Avatar

Join Date: May 2011
Location: San Diego CA
Boat: Liberty 458
Posts: 2,200
+1 to Gordmay's advice.

You also need to ensure that you don't mix different grades of stainless and that you select your filler material grades to avoid incompatible combinations. I only buy my stainless from reputable suppliers who can provide grade documentation. Without more details i can't provide specific advice.
leftbrainstuff is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Advertise Here


All times are GMT -7. The time now is 11:02.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.