Both ferrous and non ferrous can corrode. Matals that contain iron can be known as rusting and metals such as Aluminium are known as corrosion. How can we protect metals from corrosion and causing further issues?
If the panels or parts being worked on have been sanded back to bare metal it is reccomended to use epoxy primer when possible. This is the strongest and best way of protecting metal from corrosion. Also, in most cases bodyfiller and other body repair products can be applied on top of epoxy primer.
Some epoxy primers have to be cured over night but our MULTI-PRIME 2K Epoxy primer can be baked in 45 minutes at 70 degrees. After a cool down period this can be sanded and further prepared.
If you don't have epoxy primer on site there are 2 other products that can help protect the metal from corrosion. 1k etch primer and a 2k wash primer.
What's the difference between 1K etch and 2K etch primer?
1k Etch primer already contains Phosphoric Acid and is usually already thinned (RFU) this primer is effective and works well. Some primers spray differently and some dry harder than others. There's many types in the market so it's just finding the right one for your needs.
2K etch primer is whereby the Phosphoric Acid is in the activated thinners. This is where the name activated thinner usually comes from because it's actually the thinner that has the Phosphoric Acid in.
Both etch primers mentioned above will have a certain amount of zinc phosphate and/or special modified resins that are especially for the use on bare metals so it's not just the Phosphoric asid that is important. It is generally noted that the 2k wash primer is more effective as this, when mixed with activated thinner will give a stronger adhesion to the bare metal substrate.
With our MULTI-MIX 2k wash primer we reccomend that it is mixed and allowed to sit for 15 minutes before using and applying to the substrate.
If our 1k RFU is too thick for your application our P4 thinner can be used to reduce the viscosity.