Salt mist corrosion test on weld through primer and rust converters week 2

 

The samples have been in the salt mist chamber for a week now but only at high humidity and have not been sprayed with salt solution. After these photos were taken the samples were sprayed with the salt solution and left for another week. See the next weeks for the results of the long term tests.

 


 


Control standard (no coatings just cleaned with angle grinder)

 

Test Control No Coatings

(This piece was just cut to size and then cleaned with an angle grinder). As expected with no protection the sample is starting to show signs of rust after a week in a high humid atmosphere.

Sample coated with U-Pol Weld through primer

Coated with U-Pol Weld Through Primer

(This piece was cut to size and then cleaned with an angle grinder before being given one coat of U-Pol weld through primer.) This piece is showing very very slight rust spots in a couple of places but looks very good considering the humidity.

Weld through primer


Sample Coated with Bilt Hamber etchweld primer

Coated with Bilt Hamber etchweld

Etchweld

(This piece was cut to size and then cleaned with an angle grinder before being given one coat of Bilt Hamber etchweld weld through primer.) To be honest I was a little disappointed with the results (compared to the other primer) and is showing signs in a number of places of rust spots developing. It will be interesting to see what happens over the next few weeks. I know primers are supposed to be painted over so probably not a true test but interesting never the less.

Sample coated with Hydrate 80 (rust converter)

Coated with hydrate 80 rust converter

Hydrate 80

(This piece was cut to size and then cleaned with an angle grinder before being given one coat of Bilt Hamber hydrate 80 which is a rust converter but unlike some other products which have to be washed off and then primed this one reacts to form an inert surface that can be painted over). This is an interesting one as it looks quite good (difficult to see in the photos) and is not showing much in the way of rust spots even though there looks like places where the coating is thin.

The samples have been sprayed now for 2 hours with a salt solution and are still at high humidity, the photos will be taken next week and posted.

 


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| Updated 25-Apr-2008 |