• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Rust revisited

  • Thread starter Thread starter chiphead
  • Start date Start date
There was a recent thread about phosphoric acid being the best and then neutralizing it with washing soda or something similar.
 
use either Kreem/por15 or the phosphoric acid trick. I have phosphoric acid if you want some...
 
Thanks black and lord. I've read until my eyes bled on this subject and have even talked to a couple of radiator shops. In the middle of all this up pops a brand new gs1100g tank on ebay but it went for 300 which is out of my range. Anyway, I'll figure out what I'm going to do. The phosphoric acid seems to compromise the metal and promotes instant rusting if not taken care of immediately, plus it's a friggin acid!
 
steve, what do you think that POR15 or Kreem are? They are 3/2 step...Here are the steps:

Acid
Neutralizing agent
Coating

The coating tries to avoid future rust for when you forget to keep your tank full or leave it lying around for another 20 years...

Acid = phosphoric acid
Neutralizing agent: Baking soda
 
I used the phosphoric acid trick myself based on Leo's comments and Billy Ricks I think, that stuff works like a charm. I didn't enconter any instant rust at all, and it's holding up nicely. Mine was only slight powdery surface rust though, don't know what any real flakey stuff would do.

Don't get any on your skin, holy fuc%, I just about freaking passed out when I got it all over my hand with a fresh wound from earlier the same day.

One lsat thing, I used the Kreem kit before, and it failed, but I may have done a crappy job.
 
A couple of questions, guys:

Did the factory coat the inside of a new gas tank with anything to try to prevent rust, at least for a little while? If so, anybody know what it was?

Has anyone ever tried to remove rust from the chamber at the top of the metal airbox where the crankcase fumes (filled with sulphuric acid, I suspect) get sucked into the airbox thru the rubber hose? Then, they condense on the cold metal airbox. My '79 850 has rusted badly inside the metal nipple in the airbox and in the upper chamber, too. I think I'm going to use Evapo-Rust (thanks to the idea I got from this forum!) to clean it out, but I'd like to coat it with something like Kreem once I get it back to bare metal. Anyone have a recommendation on what to coat it with?

Thanks for any ideas.
 
Phosphoric acid available at Home Depot in the paint department does the trick. You can get a gallon for about $13. I used it straight out of the bottle without hurting anything. First I rattled some pea gravel around in the tank to knock stuff loose. Then threated it with the phosphoric acid for about 20 minutes. One huge chunk about 2" long, 1/2" wide, and 1/8" thick came out along with alot of little stuff. I didn't think my tank was all that bad either. I flushed the tank with a garden hose and used a blow drier to dry out the moisture. I repeated the wash again just for grins. A little more rust did come out. At the end I used a combo of naptha and motor oil as a final rinse to protect the tank until I'm ready to refill it. Just drain the solution and when the naptha evaporates you'll have a thin coat of oil left behind.
 
Por 15 store US standard tank sealer kit is what you need. It comes with directions which you need to follow to the letter. Kreem is crap, stay away from it. See my post on Painters advice needed for how to clean and seal a tank. Good luck.
 
Billy Ricks said:
Phosphoric acid available at Home Depot in the paint department does the trick. You can get a gallon for about $13. I used it straight out of the bottle without hurting anything. First I rattled some pea gravel around in the tank to knock stuff loose. Then threated it with the phosphoric acid for about 20 minutes. One huge chunk about 2" long, 1/2" wide, and 1/8" thick came out along with alot of little stuff. I didn't think my tank was all that bad either. I flushed the tank with a garden hose and used a blow drier to dry out the moisture. I repeated the wash again just for grins. A little more rust did come out. At the end I used a combo of naptha and motor oil as a final rinse to protect the tank until I'm ready to refill it. Just drain the solution and when the naptha evaporates you'll have a thin coat of oil left behind.
Click to expand...
Did you remove petcocks, fuel sending unit etc?
 
You must log in or register to reply here.
Back
Top