Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-16-2017, 09:43 AM   #1
Senior Member
 
City: Houma, Louisiana
Country: USA
Vessel Name: M/V LUNASEA
Vessel Model: 45ft Bluewater Coastal
Join Date: Aug 2014
Posts: 496
Corrosion Control

Every nut bolt and fitting is rusting on my generator what can I use to stop this. I have fans blowing in the engine room 24/7 but still not stopping the rust.
__________________
Advertisement

kartracer is offline   Reply With Quote
Old 03-16-2017, 12:01 PM   #2
Guru
 
Xsbank's Avatar
 
City: Pender Harbour, BC
Country: Canada
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,245
Paint
__________________

__________________
Don't believe everything that you think.
What are we offended about today?
Xsbank is offline   Reply With Quote
Old 03-16-2017, 12:04 PM   #3
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,781
Try something like Extend. It is a rust converter. If the rust is not scaling, it will convert it and it will be ready to paint.
Comodave is online now   Reply With Quote
Old 03-16-2017, 12:08 PM   #4
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,356
CRC corrosion block. But sounds like you have a humidity issue. Or hatches dripping from above. Both bad juju.

Better than a fan is a dehumidifier. I use one on my boat, it is magic.
Ski in NC is offline   Reply With Quote
Old 03-16-2017, 12:17 PM   #5
Guru
 
City: North Charleston, SC
Country: USA
Join Date: Sep 2010
Posts: 4,385
There are several products designed to protect metal from rusting. Shop at your favorite marine retailer. Home centers and hardware stores also sell such products, marketed to protect tools.


Some of these products are wax based, some are oil based. I prefer wax based because the oil based products tend to collect dirt.
rwidman is offline   Reply With Quote
Old 03-16-2017, 10:08 PM   #6
Guru
 
kchace's Avatar
 
City: Brookline, NH
Country: USA
Vessel Name: Blue Heaven
Vessel Model: Albin 43 classic double cabin, twin 135 Lehmans
Join Date: Sep 2013
Posts: 1,601
I like Mercury Corrosion Guard.
kchace is online now   Reply With Quote
Old 03-16-2017, 10:35 PM   #7
Guru
 
dhays's Avatar
 
City: Gig Harbor
Country: United States
Vessel Name: Kinship
Vessel Model: North Pacific 43
Join Date: May 2015
Posts: 8,433
On my engine I use a SS wire brush on any rusted spots and then paint with some Cummins paint that I have. If I didn't have that I would simply use Rustoleum. I also spray the engine with CorrosionX. I spray it on and spread it with a rag. As others have mentioned, any oil based product can collect dirt, but I still like it better than wax. If the engine has dirty spots, I will use an orange based cleaner or something like Simple green to clean it, then follow it up with CorrosionX.

You can use most anything, BoeShield works well, even WD-40 will work. So find what you like and use it.

I also keep a dehumidifier on the boat. Actually last weekend I swapped my compressor type dehumidifier for two Eva-Dry models. I will see how they compare.
__________________
Regards,

Dave
SPOT page
dhays is offline   Reply With Quote
Old 03-17-2017, 02:51 AM   #8
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,781
If they are already rusted, then you need to treat the rusted parts before you can paint them. Products like WD 40, etc are designed to prevent the rust in the first place. Now that there is already rust, you need to either get rid of the rust or convert it with a rust converter like Extend. Then paint it and do rust prevention.
Comodave is online now   Reply With Quote
Old 03-17-2017, 05:40 AM   #9
Guru
 
Rogerh's Avatar
 
City: Niceville, FL
Country: USA
Vessel Name: At Last
Vessel Model: 1990 Jefferson 52 Marquessa
Join Date: Aug 2013
Posts: 724
I had a humidity issue in my engine rooms and I found that if I left two 60w lights on in engine room it completely solved any moisture that sweated on the engines. Both lights are in engine room fixtures and brackets.
Rogerh is offline   Reply With Quote
Old 03-17-2017, 10:02 PM   #10
Guru
 
Steve's Avatar
 
City: Thibodaux, Louisiana
Country: USA
Vessel Name: Gumbo
Vessel Model: 2003 Monk 36
Join Date: Oct 2007
Posts: 3,873
Fluid Film is very good stuff too, it might be hard to find I believe John Deere dealers carry it: FLUID FILM | Powerful Corrosion Protection & Lubrication
Some Lowes too.
__________________
Steve W.
http://mvgumbo.blogspot.com/
Steve is offline   Reply With Quote
Old 03-17-2017, 11:58 PM   #11
Guru
 
Seevee's Avatar
 
City: st pete
Country: usa
Vessel Model: 400 Mainship
Join Date: Sep 2016
Posts: 2,186
There is a difference between rust and corrosion.

Rust can be treated with a lot of products that convert the rust to a paintable surface and works pretty well. However, I could argue for some rust removal stuff like Naval Jelly, which works well on easy to wire brush surfaces.

And there's lots of rust products to coat metal after the rust is removed or converted. Rustoleum is a great product.

Corrosion is a different animal and once you have it you need to mechanically remove it. That's with a wire brush, sandpaper or file. I don't know anything that will "dissolve" corrosion, and I've tried a bunch.

WD40 is not good for any of the above. It's only a water dispersant product.
Corrosion is excellent for corrosion prevention and good for any metals and electrical stuff. I buy it by the gallon. There's a bunch of other good products like Boeshield, LPS products, CRC products and more.

I use Corrosion X with a fine mist for areas like bilges, engine compartments, electrical areas, etc. Boeshield is good for stuff that spends a lot of time in the water, like drives, props and shafts, kayak pedals, and even booties with metal zippers.

And know what are the issues. Metals will rust and some will corrode. Aluminum will not rust, but will seriously corrode.

Corrosion is a BIG issue on boats and needs to be addressed.
__________________
Seevee
Seevee is offline   Reply With Quote
Old 03-18-2017, 09:49 AM   #12
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,356
If there is visible corrosion on a gennie, the problem is not that there are unsightly blemishes on bolt heads.

The same humidity conditions are present inside the air cooled electrical end and if things are corroding on the outside, they are corroding on the inside, too. Just about every stator failure I have repaired was caused by corrosion. Either from humidity swings or actual liquid water dripping on it.

All this talk about coatings and paint do nothing to address what will kill the electrical end from the inside. Need to control the moisture, somehow.
Ski in NC is offline   Reply With Quote
Old 03-19-2017, 03:57 PM   #13
Guru
 
City: Seaford Va on Poquoson River, VA
Country: United States
Vessel Name: Old Glory
Vessel Model: 1970 Egg Harbor 37 extended salon model
Join Date: Jan 2016
Posts: 2,185
My 1970 Onan gen is mounted under a leaky teak deck, everytime it rained it got wet, and yeah got rusted. It was so bad the control box top rusted away, had to make a new one. Prior owners had not been able to even use it.

My solutions were, take apart lots of it, clean, prime and paint.
Then I made a waterproof flat panel from glue, hardboard, some pine 3/4" strips to cover the entire gen.

It is supported by some wood rails screwed into the boat framing under the hatch covers.
All the rain is shed away to the edges.
__________________

sdowney717 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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





All times are GMT -5. The time now is 09:24 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×