dozierstang

I hear great things about POR-15, however before I heard of this stuff I had already bought some rust converter by Klean Strip. Is this stuff just as good or sufficient enough compared to POR-15? I would assume that it is chemically the same. I want to coat my inner fenders but I want to put some type of rust converter on there first as a primer.

coda618

They are a little different. Rust converter actually converts the rust into a black something or other. Not sure of the technical term. However, I don't think it does much for future rust. Por-15 seals the rust and stops it from spreading etc. However, although I use the Por-15, I still remove as much rust as possible. Search my user name or Por-15 and you will find many posts. Specifically, I have detailed my process on my car with Por-15. Not necessarily the only way, just what has worked for me.
Good luck

dozierstang

Yea, it claims that it turns rust into black oxide. I was planning on sealing it anyways, guess I got to use it for something. I was going to get a wire brush and knock as much rust off that I could, basically the car is in excellent shape as far as rust goes. I knocked off some of the old asphalt coating in the wheel wells and there is shinny new metal under there. It's been garage kept but not touched for over 6 years.

grruminator78

However, room temperature black oxide is not infact true oxide, just stole this from another forum

Corrosion - is an eletrolytic process, where essentially 2 different electrically conductive materials exchange electrons through a conductive medium.

Pure water is not electrically conductive, but IONISED water is., - that means the water has electrically charged or chargeable atoms or moluecules in solution - with most mineral salts being excellent in terms of both conductivity (ionising the water) and solubility.

Then what happens is typically the iron reacts with the carbon to form an electrolytic cell (think carbon zinc voltaic piles) and without going into complex reactions (and it's years since I studied surface technology), essentially the water dissociates into hydrogen and oxygen and the oxygen combines with the iron and froms one of several stages of iron oxide FE02 or FEO3 etc., (think red scale, powdery rust and black iron mill scale on bars and plate)

The fundamental mechansisim of rust prevention are to seperate the STEEL (carbon and iron) from air and water.... to prevent the cell from ever being created in the first place.

Rather than crap on for hours., which the simple minded just love and the dedicated just hate., go to your local university and study up on the mechanisims of corrosion and the prevention and or alteration (stopping) of the process - from QUALITY engineering manuals.

Also cross reference from a number of sources - because 10 different books and videos will ascribe the same situation in slightly different ways, and you will gain more clarity and understanding of the mechanisims involved and the remedies to apply.

For instance, converting the iron oxides into a phosphate or a chromate, is just dandy, but it's not an ende solution within it's self.


It needs to be undertaken in combination with a series of other process's and actions.

grruminator78

this is really interesting too, check it out!!

http://www.holzwerken.de/museum/link...lanation.phtml

crunchyskippy

Excellent explanation of the corrosion process!!! Great post, Grruminator78. I give you credit anyway...

grruminator78

awww thanks, wish I thought it up myself, but the power of the internet in the correct hands is amazing!!

coda618

Hey Soaring - Put that in the FAQ's under "Everything you ever wanted to know about Rust, and more." Seriously, good stuff.

Soaring

You got it bubba.

grruminator78

awesome glad I could help!