rust questions

[stranger12]

Hi All,

Two questions .

I don't think aliminume rusts , does it ? Some on the net say it does.

my car subframe is heavily rusted which I took it off and painted it using hammerite direct to rust. Isn't the manufacture applying some sort of material to prevent it from rusting ?
if so I guess it has lost it effect due to aging

I guess that also means my paint layer will not lost long and will need to be repainted , right ?

if I paint over a rust using direct to rust , does it absorb and dissolve the rust or it will prevent it from further rust ?

thanks
____________________
SV650 Red
R6 Red

[trevor saxe-coburg-gotha]

Aluminium oxidises - but the layer of oxide prevents further air and moisture getting to the metal, thus meaning more oxidation doesn't occur.

As for painting over rust, imle, scrupulous preparation is essential regardless of the paint brand used. And even then shit goes bad.
____________________
"Life is a sexually transmitted disease and the mortality rate is one hundred percent."

Mobylette Type 50 ---> Raleigh Grifter ---> Neval Minsk 125

[P.]

[Shinigami]

[Rogerborg]

https://i61.tinypic.com/qoy3dl.jpg
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[stranger12]

Lol
____________________
SV650 Red
R6 Red

[angryjonny]

[CaNsA]

[Wonko The Sane]

Rust is the name usually given to the oxidisation of ferrous metals, i.e., metals with an iron content.

Aluminium, as someone has already said, oxidises forming a protective layer over the component.

If you've got rust a wire brush, some coarse sand paper to flatten it back as much as possible and a bottle of K-Rust is the best bet short of replacing the metal. Then you can paint hammerite over it.
____________________
Looking to pass your CBT / Bike tests in Bury Lancashire? try www.focusridertraining.co.uk Would recommend.
They're also on Facebook https://www.facebook.com/pages/Focus-Rider-Training/196832923734251

[stranger12]

I am not a hypocrite as I have bike as well as car so technically I am fine
____________________
SV650 Red
R6 Red