Anti-corrosion paint for old metal case

  • Thread starter Thread starter Man-wai Chang to The Door (+MS=32B)
  • Start date Start date
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Man-wai Chang to The Door (+MS=32B)

I just finished removing the rust on the back plane of an old ATX case,
and would like to apply a layer of protective paint on it to prevent
future rusting!

Does the following work? Is it merely bluffing with nano-technology?

Surf City Garage 134 Nano Seal Protective Coat - 16 oz.
by Surf City Garage
Buy new: $25.19

http://www.amazon.com/Surf-City-Gar..._2?ie=UTF8&s=automotive&qid=1257325137&sr=8-2

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Man-wai Chang to The Door (+MS=32B) said:
I just finished removing the rust on the back plane of an old ATX case,
and would like to apply a layer of protective paint on it to prevent
future rusting!

Does the following work? Is it merely bluffing with nano-technology?

Surf City Garage 134 Nano Seal Protective Coat - 16 oz.
by Surf City Garage
Buy new: $25.19

http://www.amazon.com/Surf-City-Gar..._2?ie=UTF8&s=automotive&qid=1257325137&sr=8-2
Click to expand...

Isn't that stuff just car wax ?

You can buy "rust paint", which can be applied over rust.
You remove any rust which is mechanically unstable, and
you don't have to remove so much rust, that the entire surface
is shiny. The rust paint is then applied over the surface.

If you purchase rust paint, make sure it is intended for
interior applications. The metal landing on my back steps,
is coated with an exterior rust paint, and it took a long
time until the smell was gone. Don't apply a product which
stinks, or is otherwise dangerous to use in an interior
application. If you have doubts about the safety of a
product, look up the MSDS.

(You can get MSDS information for a lot of products.
This is the MSDS for POR-15. )

http://www.actiocms.com/MsdsDisplay...hor1&Language=1&CFID=1016238&CFTOKEN=62733302

Rust can also be removed with phosphoric acid. I have a small
bottle of rust remover, which I experimented with on a
small piece of sheet metal. As soon as the rust remover was
rinsed away, a very fine coating of fresh rust immediately
appeared. You couldn't possibly apply a protective coating,
considering the speed with which new rust appeared.
As a result, if you were treating a piece of metal with a
compound like this, you'd want the work piece to be completely
rinsed and dry, before applying a rust paint on top of it.
Since rust paint is designed to be applied over rust, such
a fine coating of rust on the surface won't matter.

http://en.wikipedia.org/wiki/Phosphoric_acid#Rust_removal

A regular paint may not apply well over rust, because the
paint film cannot properly form over the rust. Look for
a rust paint instead.

Paul
 
Isn't that stuff just car wax ?

Thanks.
If you purchase rust paint, make sure it is intended for
interior applications. The metal landing on my back steps,
is coated with an exterior rust paint, and it took a long
time until the smell was gone. Don't apply a product which
stinks, or is otherwise dangerous to use in an interior
application. If you have doubts about the safety of a
product, look up the MSDS.

(You can get MSDS information for a lot of products.
This is the MSDS for POR-15. )

http://www.actiocms.com/MsdsDisplay...hor1&Language=1&CFID=1016238&CFTOKEN=62733302
Click to expand...

Thanks again!

--
@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
/( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.31-14-generic
^ ^ 18:35:01 up 5 days 16 min 2 users load average: 1.06 1.19 1.14
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http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa
 
Isn't that stuff just car wax ?

You can buy "rust paint", which can be applied over rust. You remove any
rust which is mechanically unstable, and you don't have to remove so
much rust, that the entire surface is shiny. The rust paint is then
applied over the surface.

If you purchase rust paint, make sure it is intended for interior
applications. The metal landing on my back steps, is coated with an
exterior rust paint, and it took a long time until the smell was gone.
Don't apply a product which stinks, or is otherwise dangerous to use in
an interior application. If you have doubts about the safety of a
product, look up the MSDS.

(You can get MSDS information for a lot of products. This is the MSDS
for POR-15. )

http://www.actiocms.com/MsdsDisplaycode_adm_australian.cfm? msds_id=522629&dbname=actioauthor1&Language=1&CFID=1016238&CFTOKEN=62733302

Rust can also be removed with phosphoric acid. I have a small bottle of
rust remover, which I experimented with on a small piece of sheet metal.
As soon as the rust remover was rinsed away, a very fine coating of
fresh rust immediately appeared. You couldn't possibly apply a
protective coating, considering the speed with which new rust appeared.
As a result, if you were treating a piece of metal with a compound like
this, you'd want the work piece to be completely rinsed and dry, before
applying a rust paint on top of it. Since rust paint is designed to be
applied over rust, such a fine coating of rust on the surface won't
matter.

http://en.wikipedia.org/wiki/Phosphoric_acid#Rust_removal

A regular paint may not apply well over rust, because the paint film
cannot properly form over the rust. Look for a rust paint instead.

Paul
Click to expand...

If you've never used POR-15 before, read the directions carefully. It's
great stuff but if you make a mistake, it's nearly impossible to remove
once it has set up.
 
If your case is rusting something is very wrong. Either the environment
the case is being stored in is contributing to the rusting or there's
something wrong with the case, or both. I'd look into that before
deciding what enamel paint you're going to use, or you could be looking
at corrosion of more vital components next time.
Click to expand...

I also think periodic removal of dust accumulated at the back could
avoid accumulation of moisture which might lead to rusting...

I haven't cleaned the case for many years, and the PC was working around
the clock all the time! :)

--
@~@ Might, Courage, Vision, SINCERITY.
/ v \ Simplicity is Beauty! May the Force and Farce be with you!
/( _ )\ (x86_64 Ubuntu 9.10) Linux 2.6.31-14-generic
^ ^ 21:00:01 up 5 days 2:41 2 users load average: 1.05 1.07 1.08
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Man-wai Chang to The Door (+MS=32B) said:
I just finished removing the rust on the back plane of an old ATX case,
and would like to apply a layer of protective paint on it to prevent
future rusting!

Does the following work? Is it merely bluffing with nano-technology?

Surf City Garage 134 Nano Seal Protective Coat - 16 oz.
by Surf City Garage
Buy new: $25.19

http://www.amazon.com/Surf-City-Gar..._2?ie=UTF8&s=automotive&qid=1257325137&sr=8-2
Click to expand...

I'd be skeptical because a layer of wax (no matter what it's called)
has to be a lot thinner than paint and so will almost surely let much
more moisture penetrate through it. Apparently the best paint, by
far, for sealing out moisture is oil-based enamel, while lacquer is a
lot more porous (some makers of car covers prohibit the use of their
products over lacquer finishes, even GM factory paint jobs). But
worst of all is latex, which I've read is 100x as permeable to
moisture as alkyd enamel house paint is (why alkyd over latex causes
blisters).

Paul mentioned rust paint, and I've had good luck with Krylon Rust
Tough on my car wheels.

I was told to treat bare metal with phosphoric acid to make paint sick
better to it, and photos at an auto paint supply house showed that
painted steel panels, intentionally scratched all the way through the
paint, rusted a lot less when the acid was used. And at least for
steel, oxalic acid can be used instead.

How about cold galvanizing spray? It leaves a coating made of 90-98%
zinc.




Paul mentioned rust paint, and one brand is Krylon Rust Tough, which
I've used on rusty car wheels.
 
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