Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-02-2013, 06:17   #16
Senior Cruiser
 
Vasco's Avatar

Cruisers Forum Supporter

Join Date: Apr 2004
Location: Toronto
Boat: CS36Merlin, "La Belle Aurore" Ben393 "Breathless"
Posts: 7,140
Re: How to remove Rust on Stainless Steel?

I know Spotless Stainless passivates the stainless. Don't know if any of the other methods which involve oxalic acid and scrubbing does.
__________________

__________________
Rick I
Toronto in summer, Bahamas in winter.
http://groups.yahoo.com/group/beneteau393/
Vasco is offline   Reply With Quote
Old 20-02-2013, 22:13   #17
Registered User

Join Date: Oct 2011
Posts: 2,433
Re: How to remove Rust on Stainless Steel?

OSPHO(brand name)(phosphoric acid) works wonders at getting rust of off anything, but should be rinsed very well from stainless steel. Polish with any normal SS polish after the Ospho treatment.__worked well for me with Taiwan SS.____Grant.
__________________

__________________
gjordan is offline   Reply With Quote
Old 20-02-2013, 22:33   #18
Registered User

Join Date: Dec 2009
Posts: 3,016
Images: 4
The science is that one wants to remove the iron oxide (rust) from the stainless steel without removing the chromium and iron. Acids tend to be too aggressive. Most will etch the surface leaving it dull. The popular stainless polishing compounds use a different chemistry to dissolve the rust.

If the chromium at the surface is removed with acid or sanding or abrasive cleaners then what remains will be chromium. And exposed iron. The iron will rust. This begins an endless cycle of aggressive cleaning. What is needed is passivation - which is a fancy word for dissolving the iron to leave only passive chromium at the surface. At a factory they will use a carefully controlled acid wash and polishing regime.

For us, the best way is one of the many stainless polishing pastes. They are designed to remove the surface iron (the cloth turns black) and leave polished chromium behind.

Rinse and air dry for a few days is important. Waxes are a bad idea except just before the boat show.
__________________
daddle is offline   Reply With Quote
Old 20-02-2013, 22:38   #19
Do… or do not
 
s/v Jedi's Avatar

Cruisers Forum Supporter

Join Date: Feb 2009
Location: in paradise
Boat: Sundeer 64
Posts: 9,198
Re: How to remove Rust on Stainless Steel?

I recommend to take the fittings off the mast and have them electro-polished. I know it has the best results by far, and I also believe that in your case it's worth the effort.

cheers,
Nick.
__________________

__________________
s/v Jedi is offline   Reply With Quote
Reply

Thread Tools
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




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 00:00.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.