Rust removal, citric acid and flash rusting

VW Posted hell of a lot Posts: 6,000	Rust removal, citric acid and flash rusting VW @vw
	Oct 10, 2020 10:33:57 GMT Select Post Deselect Post Link to Post Back to Top
	I've set up a tank of citric acid for rust removal. I'm impressed so far, seems to be working well. First test pieces however are suffering a bit from flash rusting after. I'm just thoroughly rinsing with clean water. The plan is to epoxy prime after so I want to get a few bits done ready. What's the best way to deal with the flash rusting? Is it worth setting up a bicarb tank to neutralise? Or is there anything I can spray on them after rinsing that won't be a pain when I come to prime? Or, doninjust have to live with it and manually remove the flash rust before priming? Thanks.


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crockpot Posted a lot Posts: 1,408	Rust removal, citric acid and flash rusting crockpot @crockpot
	Oct 10, 2020 12:29:38 GMT Select Post Deselect Post Link to Post Back to Top
	Wipe on some phosphoric acid, let it sit wet for a while then wipe off. Leaves a slightly yellow tinted phosphate coating.
	Last Edit: Oct 10, 2020 12:29:55 GMT by crockpot Proton Jumbuck-deceased :-( 2005 Kia Sorento the parts hauling heap V8 Humber Hawk 1948 Standard12 pickup SOLD 1953 Pop build (wifey's BIVA build).

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chris y Part of things Posts: 548	Rust removal, citric acid and flash rusting chris y @chrisy
	Oct 11, 2020 0:57:48 GMT Select Post Deselect Post Link to Post Back to Top
	When i've used various rust removal methods I've had flash rusting. First I thought that drying quickly with heat might help, but it made it worse. Then I tried compressed air, that helped a lot, then of course keep them somewhere dry like in the house until you paint.


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VW Posted hell of a lot Posts: 6,000	Rust removal, citric acid and flash rusting VW @vw
	Oct 11, 2020 7:49:03 GMT Select Post Deselect Post Link to Post Back to Top
	Oct 11, 2020 0:57:48 GMT chris y said: When i've used various rust removal methods I've had flash rusting. First I thought that drying quickly with heat might help, but it made it worse. Then I tried compressed air, that helped a lot, then of course keep them somewhere dry like in the house until you paint. I had been using heat, I'll try air instead. Thanks.


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