Ok .... I've been reading the posts on derusting in the last few months, and finally have tried what seemed to me the easiest and possibly most efficient process ..... that of dipping rusty parts in phosphoric acid. It's readily available at Home Depot, Ace Hardware, Lowes, etc. The photos tell the story, but essentially all I did was degrease the hub with some dishwasher soap, and then dip it in 2 gallons of the OSPHO at full strength for 20 hours.
As you can see, it came out very clean. The second hub is now in the "Juice" for it's bath, and will be just as clean I'm sure.

You can see in the cleaned and dried state of the hub that it has a slight green tint to it. That's a minor residue of the OSPHO on it, and oddly it is of benefit as a flash rust preventative. Works well!!

Hope this helps others in how to get rust removal done with as little extra effort as needed. No more molasses, bead blasting, etc for me! (grin)

RG in Spokane

 

RG, I would guess that you are going to replace your bearing race. If not I would recommend that you remove them before the acid treatment. Looks like it cleaned up the hub pretty well. Thanks for the info.

Gil

 

Hmmmm ... replace the races?? Well actually they were so rusted in, they wouldn't come out without a lot more hammering than I was comfortable with. Should be easy now I'm thinking ... and since these are some back up hubs that may sit on the shelf a while, I'll wait until they are needed, and of course will put in all new races, and bearings then. Not to worry!

 

How many hubs will your one gallon do? Each time you d-rust a part the chemical becomes less potent. You might find that bead blasting is more economical from a $ standpoint, that is if you have your own blast cabinet.