Rusting Shavings

[LaurierME]

Hi,

I have a temporary problem im hoping to find a relatively easy / cost effective sollution for. I have a set of powdercoated, galvanized panels that are being fastened with self-drilling 410 SS fasteners. These panels are outdoors, and after several days of rain the shavings from the self drilling screws have started to rust and spread corrosion to the panels. I have a limited volume of parts that need to be used up before a corrected revision can be purchased.

We have looked at applying various waxes, rust converters, and other coatings to the screw after running it through the panel to "coat" the shavings. What i would like to find is a product that someone has known to work in a similar situation that we might get several years of life from in an outdoor environment.

Thanks

 

[unclesyd]

Give these people a call. They have an extensive line of protective coatings for storage.

http://www.cortecvci.com/Products/products.php

 

[ck1999]

Try WD-40. What you are needing to do is protect the galvanized panels from rusting. Galvanized panels are nothing but steel panels with a zinc layer on top of them. So when you cut through the zinc layer you are allowing the steel to be exposed. I would suggest WD-40 it works well if you need to be resistant to rain can you place them under a shelter.

Also can you screw the parts together before painting?

ck1999

 

[CoryPad]

WD-40 to provide several years of life? That is completely unrealistic.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[EdStainless]

You really need to use a bit of a Zn-rich paint to coat these areas. You need protection similar to your original coatings. To get the maximum protection you would use a Zn-rich primer and a topcoat sealer.

= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[ck1999]

corypad,
you are correct about WD-40. I overlooked the several year outdoor storage and was focusing on the rusted shavings.

Ck1999

 

[LaurierME]

As it stands right now we have a few weeks of real world testing in the weather with both a cold galv. compound and an off the shelf rust converter. Both are holding up better than i expected to rain / sleet. At this point the longevity of these "bandaids" is my concern.

thanks for the tip on cortec.

I find that a lot of the wax type coatings that i would otherwise be interested in have very short working periods (in terms of years). I guess my application is truly a niche market. proves the point though, proper design is always the best solution.