I tend to wary of anything labeled "acid." Although phosphoric acid, which is found in pool cleaner, would seem much less toxic than anything that would "etch" (eat) concrete.
But that's just me. :) On Feb 20, 2:31 pm, Kevin Green <[email protected]> wrote: > Hi Everybody, > > I Thought I would share a hard lesson I just learned. I had great success > with Phosphoric Acid, sold at Advance Auto Parts for about $7/quart as > Purple Power De-Ruster. I found out that concrete etch, sold for about > $12/gallon is (usually) also Phosphoric Acid. It seems that the phosphoric > acid does a great job of actually converting the rust (iron oxide) back to > iron and actually reversing the rust. Unfortunately I bought a concrete > etch that also had Nitric Acid (in addition to Phosphoric), which is not > selective the same way, and while it converted the the rust on my header > pipe back to iron, it also ate the iron, so I have a totally destroyed > header pipe to replace. If anybody is interested I can share photos > comparing how nice a job the phosphoric did when a part was left to soak > overnight, and how brutally the part was destroyed when left in Nitric for > about 9 hours. > > TL;DR; Phosphoric Acid Good, Nitric Acid Bad > > Kevin -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
