derust solution for alloy and steel at same time

[steveo3002]

i have a part with rusted steel fixed into alloy ....what can i use that wont attack the alloy

would citric work for this?

 

[Kram]

Wire brush.

Anything wet is likely to cause rapid galvanic corrosion and preferentially instead of dealing with the rust. Do a test with something unimportant, I wouldnt expect it to work well.

Another option is mask of the aluminium with cheap solvent gloss paint and then after strip it off with thinners, then it should work as normal.

 

[julianf]

Anything wet is likely to cause rapid galvanic corrosion and preferentially instead of dealing with the rust.

I dont know, but my feeling is that electrolysis may charge the cathode sufficiently for this not to occur.

It would be an interesting thing to test (not on steveo's parts, but as a test!)

 

[Farside]

Google alum.
Might work, might cause tears before bedtime.
<shrug> Never tried it but some say it works.

 

[Kayos]

I accidentally chucked an aluminium tube in some citric acid, the aluminium was fine, the steel parts disintegrated