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01-28-2018, 11:53 PM
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#1
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Guru
City: San Francisco
Vessel Name: Speedy Charlotte
Vessel Model: Beneteau Swift Trawler 44
Join Date: Oct 2016
Posts: 679
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Rust stains at base of railings
On my ST44 I occasionally get rust stains around the base of the railings at the point they meet the fiberglass. This has happened on the upper deck, as well as around the short railings around the cockpit. I'll take a pic next time I'm on the boat, but wondering if this happens to others.
The railing is stainless, so not sure what exactly is rusting. And I'm assuming it's rust.
Thanks,
Mike
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01-28-2018, 11:55 PM
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#2
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Guru
City: Inside Passage Summer/Columbia River Winter
Vessel Name: Alaskan Sea-Duction
Vessel Model: 1988 M/Y Camargue YachtFisher
Join Date: Jul 2012
Posts: 8,050
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Yep and I use FSR to take it off. Interested in other comments and different way....
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01-29-2018, 12:02 AM
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#3
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Guru
City: San Francisco
Vessel Name: Speedy Charlotte
Vessel Model: Beneteau Swift Trawler 44
Join Date: Oct 2016
Posts: 679
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01-29-2018, 12:17 AM
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#4
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Guru
City: San Francisco
Vessel Name: Speedy Charlotte
Vessel Model: Beneteau Swift Trawler 44
Join Date: Oct 2016
Posts: 679
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Rust stains at base of railings
Seems like the Star Brite Rust Stain Remover gets good reviews. Love the thought of spray on spray off or just a light scrub. This chemical approach is likely much easier than trying to get it off using a mild polish.
Just ordered some on Amazon. Will let you know how it works.
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01-29-2018, 12:25 AM
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#5
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Senior Member
City: Seattle, WA.
Join Date: Dec 2013
Posts: 127
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Quote:
Originally Posted by MichaelB1969
Seems like the Star Brite Rust Stain Remover gets good reviews. Love the thought of spray on spray off or just a light scrub. This chemical approach is likely much easier than trying to get it off using a mild polish.
Just ordered some on Amazon. Will let you know how it works.
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I’ve used this and was surprised at how well it worked. Cheers!
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01-29-2018, 12:47 AM
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#6
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Guru
City: Sydney
Vessel Name: Sojourn
Vessel Model: Integrity 386
Join Date: Oct 2011
Posts: 13,333
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It it a reflection(no pun intended) of using 304 rather than 316 s/steel? Or can it happen with 316?
__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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01-29-2018, 12:56 AM
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#7
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,191
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Does it appear to be leaking from inside the stanchion or is it surface rust? S/S can get corrosion when there is not enough oxygen. May be water is inside and then leaking out and carrying the rust out of the stanchion base.
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01-29-2018, 01:17 AM
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#8
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Guru
City: San Francisco
Vessel Name: Speedy Charlotte
Vessel Model: Beneteau Swift Trawler 44
Join Date: Oct 2016
Posts: 679
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Quote:
Originally Posted by Comodave
Does it appear to be leaking from inside the stanchion or is it surface rust? S/S can get corrosion when there is not enough oxygen. May be water is inside and then leaking out and carrying the rust out of the stanchion base.
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Hard to say. I'll have to take a closer look next time I'm on the boat. Will let you know!
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01-29-2018, 09:14 AM
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#9
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Guru
City: Miami Florida
Vessel Name: Possum
Vessel Model: Ellis 28
Join Date: Aug 2011
Posts: 5,308
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It is very common for stainless to surface rust on boats. I suspect it is 304 not 316 stainless.
It is very easy to clean if you don’t let it go too long. Any of the oxalic acid based rust stain removers will work.
The best rust stain removers are hydrofloric acid based. Look for Whink or Erusticator in the laundry aisle in your grocery store. They are marketed to remove rust stains from clothing but they actually work much faster than oxalic acid cleaners on stainless and gel coat. Don’t let it sit on glass. I’m told that hydrofloric acid will etch glass.
I just squirt it on the stain and most of the stain just disappears. I rub what ever remains with my finger and then rinse my finger before it starts to sting. Girly men might want to wear gloves. Do keep it out of your eyes.
Rust Stain Remover | Rust Stain | Whink Products Company - America's #1 Specialty Cleaner Company, Eldora, IA
__________________
Parks Masterson
Retired from Hopkins-Carter Marine Supply
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01-29-2018, 11:08 AM
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#10
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Enigma
City: Slicker?
Join Date: Oct 2007
Posts: 16,566
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Greetings,
Mr. MB. I've had VERY good success with: Spotless Stainless Home
I had some SS turnbuckles that were slightly rusted. Brush on, wait (but keep moist in hotter weather) rinse off with hose. The website states the product leaves a protective coating. It must because after 1.5 years, not a speck of rust. YMMV.
Mr. HC. HF (hydroflouric acid) is nasty, nasty stuff.
http://www.whink.com/cmssites/ws0811...Oct%202016.pdf
__________________
RTF
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01-29-2018, 11:18 AM
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#11
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,682
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For stainless that has some serious rust areas, Lena uses Bar Keepers Friend with a tooth brush. It contains some mild abrasives plus oxalic acid.
https://www.barkeepersfriend.com/cle...soft-cleanser/
On normal day to day ss polishing, with minor rust, she uses Collinite’s no. 850 Metal Wax.
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01-29-2018, 11:26 AM
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#12
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Guru
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
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Hopcar, Google what hydrofluoric acid does to your body - it may not burn your skin but it penetrates your skin and dissolves the calcium. First thing that happens is your nails fall out because the nailbed is gone. Then it starts working on your bones. There is no antidote once it gets inside you, only before, and it is cumulative. I believe they cut off the parts with acid in them. So "girly men" is a stupid thing to say; if I were the King I would ban Hydrofluoric acid everywhere and in everything as I think it is worse than plutonium.
__________________
Don't believe everything that you think.
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01-29-2018, 11:33 AM
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#13
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Guru
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
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RT you beat me to it. Its nasty, nasty stuff and keeping it in your house or boat is stupidly reckless. Live with a little surface rust or damage yourself? Good choice. Fluorosis - look that one up too!
The whink company should be shot and p*ssed on!
__________________
Don't believe everything that you think.
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01-29-2018, 12:23 PM
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#14
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Senior Member
City: WAALRE
Vessel Name: Mr. Blu
Vessel Model: Beneteau Swift Trawler 52
Join Date: Jun 2017
Posts: 147
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The cause of thIS rust are small iron particleS which are carried by the wind or rain or snow.. The particles fall down on the stainless steel and will make an connection with the chromium parts in the stainless steel. When your boat is is the vicinity of a dockyard or metal factory you have more chance to develop this kind of rust than when you are on the open sea. In the end this superficial rust can also contaminate your SS so cleaning the object is required. Most of the time it is very easy to clean the SS.
__________________
Paul
Cruising the Netherlands
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01-29-2018, 12:50 PM
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#15
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Guru
City: San Francisco
Vessel Name: Speedy Charlotte
Vessel Model: Beneteau Swift Trawler 44
Join Date: Oct 2016
Posts: 679
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Rust stains at base of railings
Quote:
Originally Posted by Mr. Blu
The cause of thIS rust are small iron particleS which are carried by the wind or rain or snow.. The particles fall down on the stainless steel and will make an connection with the chromium parts in the stainless steel. When your boat is is the vicinity of a dockyard or metal factory you have more chance to develop this kind of rust than when you are on the open sea. In the end this superficial rust can also contaminate your SS so cleaning the object is required. Most of the time it is very easy to clean the SS.
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Actually, I think you're on to something as this has only happened when my boat has been at the boat yard - which is where it's been for the 3 weeks prior to me posting this.
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01-29-2018, 12:55 PM
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#16
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Guru
City: Powell River, BC
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 4,075
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Quote:
Originally Posted by Mr. Blu
The cause of thIS rust are small iron particleS which are carried by the wind or rain or snow.. The particles fall down on the stainless steel and will make an connection with the chromium parts in the stainless steel. When your boat is is the vicinity of a dockyard or metal factory you have more chance to develop this kind of rust than when you are on the open sea. In the end this superficial rust can also contaminate your SS so cleaning the object is required. Most of the time it is very easy to clean the SS.
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It may be iron contamination or organic contamination...
But it is likely the loss of the passivation layer of the stainless steel. Pretty common with lower grades of stainless steel; particularly near surface defects or heat tint and oxide scale from welding.
The worse case scenario would be that the fabricator chose the wrong filler material when making the weld. I.e. 304 or 309 on 316, creating a chromium depleted zone.
The advice you've gotten so far, is pretty accurate. Use an oxalic or citric based cleaner polisher.
If you see tinting of the metal from welding, consider nitric acid.
Do not use hydrochloric acid, as it contains chlorides.
Hydrofluoric acid is indeed dangerous to humans and pretty much every material it touches. (Breaking Bad, early episode, bathtub). Very regulated in industry, because of that.
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01-29-2018, 04:20 PM
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#17
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Guru
City: Between Oregon and Alaska
Vessel Name: Charlie Harper
Vessel Model: Wheeler Shipyard 83'
Join Date: Jun 2016
Posts: 3,023
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It could be the fasteners.
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01-29-2018, 04:34 PM
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#18
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Guru
City: Powell River, BC
Vessel Name: Northern Spy
Vessel Model: Nordic Tug 26
Join Date: Feb 2012
Posts: 4,075
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Quote:
Originally Posted by Lepke
It could be the fasteners.
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D'oh. Yes. That is very likely as well.
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01-29-2018, 04:40 PM
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#19
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TF Site Team
City: Seneca Lake NY
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 7,828
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DO NOT....DO NOT EVEN THINK ABOUT USING HF ACID.
OTHER WARNINGS ARE CORRECT AND SHOULD BE HEEDED.
This not a macho thing and it is irresponsible to recommend anyone consider using it
Ocalic acid based cleaners are plenty strong enough to do the job
Sorry Hopcar.... don't remember disagreeing with you in the past...respect your contributions and all you have done for TFrs... Couldn't let this go w/o a response
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
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01-29-2018, 04:48 PM
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#20
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Senior Member
City: WAALRE
Vessel Name: Mr. Blu
Vessel Model: Beneteau Swift Trawler 52
Join Date: Jun 2017
Posts: 147
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You can als find it also on the polyester where the stanchions are mounted. It is not the stainless steel or the polyester that is rusting but the very small particles of iron. The quality of the SS doesnot have anything to do with it. The particles stick to the SS because there is a difference in voltage between the SS and the iron particles. (Like a magnet although SS is not magnetic itself because of the chromium in the alloy). But the same applies for the polyester next to the stainless steel. In Dutch you have a special name for it : " vliegroest" literally translated in English: flying rust. It is a well known phenonomen in industrialized areas. It is superficial (you can feel some roughness when you touch the SS. You should polish it because otherwise it will "infiltrate"the SS. (How quick that happens depends of the quality of the SS).
When we had a chartercompany for Sailing yachts in the Netherlands nearly all the boats in the marina suffered from it because the air in the Netherlands gets polluted by industries more than 200 miles away. AnD especially in a salty environment near the sea.
__________________
Paul
Cruising the Netherlands
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