Vinegar in the ultrasonic

[shadetree#1]

And did you read the directions that most time you are to do a rinse cycle after cleaning? That is why I use a non residue soap when cleaning or do a rinse cycle.

I even been known to clean a carburetor with battery acid but not in a USC and you must rinse it good afterwards.

I've worked with a see lots of people that first thing that goes in the trash, out the window or gets stuck to the bottom of their feet is the instructions.

Seen couple of machinist trying to put together a little steel kit building and after couple hours they noticed things were not fitting correctly and the doorway not square and fitting properly.

I noticed the assembly instructions blowing away with red clay footprints on the paper and hanging on a chain link fence about 60 yards away. I got the paper and stuck it in my pocket and when they started cursing the building I handed them the paper and suggested they might check such for CORRECT assembly.
I came by later and most of the building was taken apart. I just smiled and kept going because it was not a good friendly place to be at the time. They gave me the stink eye.

 

[StarTech]

Yes it is just as bad as it was 40 yrs ago. File 13 catches a lot of instructions.

 

[PTmowerMech]

And did you read the directions that most time you are to do a rinse cycle after cleaning? That is why I use a non residue soap when cleaning or do a rinse cycle.

I even been known to clean a carburetor with battery acid but not in a USC and you must rinse it good afterwards.

I rinsed it good with water. And thought that was the reason for the rust coming back so quick.

Lot's of good info on this thread. Thanks guys.

 

[PTmowerMech]

Yes it is just as bad as it was 40 yrs ago. File 13 catches a lot of instructions.

It's the manly way of doing it. Like not stopping for directions. LMAO

 

[bertsmobile1]

When you chemically clean anything the surface is active because the chemical cleaner has removed any protective oxide coating that may have been there .
All metals do not want to be present as metal they want to go to a low energy state which is usually an oxide or sulphide so the surface will react with any oxadizing agent it is exposed to
In most cases this will be Oxygen from the air.
Added to that the tiny etch pits that you can not see without a microscope create a oxygen potential circuit if the surface is exposed to an electrolyte
Thus when pulled out of an acid dip steel will rust right before your eyes.
So something has to be done to passivate the surface .
With steel you have a choice of phosphates or hydroxides to form a tough surface layer to prevent the oxadizing agents coming into contact with the active iron surface .
Drying the surface with DRY air slows down this process because there is no electrolyte to make the bridge.
Flame heating will allow active iron atoms on the surface to passivate temporarly
Corrosion ( rust ) is a GALVANIC process, not a chemical one so you need a variation in the electrical potential and an electrolytic connection between these potentials ( usually moisture )