After recent discussion I thought this topic might be useful.
This is what I do,
Before placing parts in the Evaporust I wash them all with a 2000 psi water pressure cleaner to lessen the contamination to the Evaporust. If the pressure is going to damage or remove paint markings etc then parts will have a low pressure rinse or not be washed. Use a degreaser if necessary.
Place parts in the Evaporust, all of the part must be fully immersed.
The Evaporust works very well at around 27 degrees Celsius (80 F) To keep it heated while in use I have a fish tank heater mounted in PVC tube so that the glass heater is protected from impact. (Safety Warning, switch of power to heater before handling)
The heat produces a lot of evaporation, this must be recovered by placing a lid on the container.
The ratio of Evaporust and water must be kept close to original as possible for best results.
After 12 hours remove the parts and place in another tub to drain so that most Evaporust can be returned to the bath. The parts are then cleaned with the pressure cleaner. If there is still some rust present then put them back in the bath.
If all rust has been removed then dry them immediately with compressed air.
I then place the parts in an old oven at 80 degrees C ( 176 F ) to remove all moisture.
Parts are left to cool then cleaned with prepsol and coated with whatever is needed.
If flash rust appears the part may need to be treated with deoxidine prior to paint. Or put back in the bath and clean and dry under different weather conditions.
If I'm not using the Evaporust bath for awhile I return it to the original container and put the lid on.
To transfer the Evaporust I use a 12 volt pump running through a filter to keep contamination to a minimum.
Don't return the dirty deposits from the bottom of the bath back to the storage container.
If you don't want to coat or paint the parts straight away, dip the clean parts back in the Evaporust and remove then let drip dry. This will leave a coating to minimize rusting for a week or two.
After Evaporust, hardened steel may have a black carbon coating, this can be wire brushed off easily.
Do not use on tin. Nasty fluorescent green reaction (Thanks to 68 S Code)
Evaporust is tough on original zinc dichromate plating. Use with caution. (Thanks Caspian65)
Do not use on exhaust manifolds, I did and the effectiveness of the Evaporust was reduced dramatically the next day. This Evaporust remains separated from the main batch and will probably be thrown out.
Perhaps something in the exhaust residue affected the Evaporust.
Any other do's and dont's ?
