How bad is the rust in this tank?

[wakdady]

I got some Kreem to clean out this rusty tank. Some people advise using something more to get the rust out, but i'm not so sure if this tank is all that bad.
I was hoping to use just the Kreem product and call it a day. Has anyone on here used Kreem? For those who have done this, how would you handle this tank?

[Marsh White]

Please DO NOT use Kreem!  Do a search on this forum for more info - I don't have the time to re-type or search for you right now...but Kreem sucks!!!!!   There is something A LOT better call POR something - POR-15 maybe?  Anyway - it will show up in the searches.

[DailyDriver]

I've used muratic acid to clean a rusty tank with good results. You can by at any pool supply store. Be sure to remove all pot metal from the tank first if you use, e.g. petcock, gas cap. FWIW

[wakdady]

what about a liner. i keep reading about having to line the tank afterwards. do i have to do this?

[mickarch]

Check out Rustol. It's a rust converter instead of coating.

http://www.sudco.com/rustol.html

[Brook]

..... A few years ago, I used....A Por-15 parts# CTRK   $40 or Heavy Duty, parts # HDCTRK   $45 ..... to clean and seal the in-side of the rusty tank........ With great results.

It is a three-step process, [using hot water]........But, with the size of the FJ tank. To make sure all area is covered I used a second can of sealer.
                                    Jeff

[Dan Filetti]

I've used muratic acid to clean a rusty tank with good results. You can by at any pool supply store. Be sure to remove all pot metal from the tank first if you use, e.g. petcock, gas cap. FWIW

Muriatic acid is Hydrochloric acid (HCL) I buy it by 5 gal containers for my pool.  Nasty nasty stuff.  Spill just a bit of it on the concrete deck and it will sizzle away as if it means to eat a hole in the deck itself.

I imagine that it would do a number on rust, and the tank too, left in long enough....

Dan 

[rktmanfj]

If you use phosphoric acid, it will convert the rust.  From Wiki:

>>Rust removal

Phosphoric acid may be used as a "rust converter", by direct application to rusted iron, steel tools, or surfaces. The phosphoric acid converts reddish-brown iron(III) oxide (rust) to black ferric phosphate, FePO4.

"Rust converter" is sometimes a greenish liquid suitable for dipping (in the same sort of acid bath as is used for pickling metal), but it is more often formulated as a gel, commonly called naval jelly. It is sometimes sold under other names, such as "rust remover" or "rust killer". As a thick gel, it may be applied to sloping, vertical, or even overhead surfaces.

After treatment, the black ferric-phosphate coating can be scrubbed off, leaving a fresh metal surface. Multiple applications of phosphoric acid may be required to remove all rust. The black phosphate coating can also be left in place, where it will provide moderate further corrosion resistance. (Such protection is also provided by the superficially similar Parkerizing and blued electrochemical conversion coating processes.)<<

You can get phosphoric acid at Home Depot under the name 'Prep and Etch'.

Randy T
Indy

[junkyardroad]

That is not bad at all.  I cut this tank up to make it larger for an O/T bike.



I ground the rust off and used Kreem after it was completed. I didn't like it. Stick with just a rust converter.

Heres the thread..
http://www.vn750.com/forum/showthread.php?t=17254

[Marsh White]

I ground the rust off and used Kreem after it was completed. I didn't like it. Stick with just a rust converter.

Heres the thread..
http://www.vn750.com/forum/showthread.php?t=17254

Great job on that Kawi gas tank!   

I noticed a link in your thread to this epoxy gas tank sealer:  http://www.caswellplating.com/aids/epoxygas.htm   Seems promising!  Have you or anyone else had any experience with it?  I have a couple pinhole leaks in my 86 gas tank I need to fix.  I wonder if this would work?  Save my buddy from welding on it and probably screwing it up...

[junkyardroad]

That epoxy sealer seems to be a far superior product than Kreem.  I'm not sure it even needed the sealer since all the seams were leaded, but it seemed like a good preventative at the time.  Anyway, the paint was damaged during the process (uncured) and the bike was a freebie that was more valuable in parts.  Why waste a free motorcycle though? I put it on the lift with about 13k and now it shows 22 +/-.  What the hell. 

My wife rides the Vulcan and I usually ride the FJ.  Good times.

The O/P should have no problem with the small amount of rust in that tank.  A thorough rinsing with laquer thinner and some fresh gas would probably do it for the season.

[irishluck]

USE POR-15!!!!

i looked in my tank on my bike i got and completly rusted. bought the por-15 kit for like $40 from there site and wow does the inside look great and sealed perfect. but make sure to follow the direction s exactly