Tangentially related via nitric acid: it's bad news if you're homebrewing biodiesel using acid esterification techniques. Glycerine + Nitric Acid + churning = crude nitroglycerin...
Thank goodness I only know this secondhand! Kurt On Feb 21, 2012 8:17 AM, "Stephen Brown" <[email protected]> wrote: > I made the same mistake - dont do it lol ... no concrete cleaner :) > > On 21 February 2012 13:14, Graham Rogers <[email protected]>wrote: > >> I thought muriatic acid was the ingredient in concrete etch. >> >> On Feb 21, 2012, at 4:08 AM, surfswab wrote: >> >> > 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. >> > >> >> -- >> 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. >> >> > -- > 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. > -- 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.
