Titanium Posted February 12, 2015 Posted February 12, 2015 (edited) Name of composition: Oxalate RedComposition Type: metallicCreator: TitaniumColor/Effect: A nice and strong red with a good flame envelopeThe Composition: (by weight):Sr(NO3)2 - 30Mg - 25Strontium Oxalate - 20Parlon - 15 Precedure/Preparation: Bind with Aceton and cut into desired size My camera made the flame looking orange, but in real it is a nice, strong red as you can see in the background http://fs1.directupload.net/images/150212/temp/uj8i2fev.png Edited February 12, 2015 by Titanium 1
schroedinger Posted February 13, 2015 Posted February 13, 2015 Did you use coated mg? No trouble with mg / oxalat reaction?
Titanium Posted February 13, 2015 Author Posted February 13, 2015 No I didn't use coated Mg, because I read that oxalate is able to destroy Linseed coating on Mg.I thought about coating with dichromate, but I don't had any trouble, if the Chems were dry and the Stars were bound with aceton or alcohol
Ubehage Posted September 25, 2015 Posted September 25, 2015 Did you use coated mg? No trouble with mg / oxalat reaction?Can you explain further into this subject?I'm very interested in which chemicals react with other chemicals, mostly for taking notes. I searched Google for reactions with Mg and Str Ox, but didn't find anything other than it being an excellent red
rogeryermaw Posted September 25, 2015 Posted September 25, 2015 (edited) Oxalates and carbonates among other chemicals we use can speed the reaction of Mg with water which then evolves heat further speeding the reaction...possibly to a dangerous point. a solution of potassium dichromate in water will react with the surface of Mg to passivate it against further reaction, leaving it safer to use in compositions. The leftover dichromate solution, however can be an environmental pain in the ass(carcinogenic). There are other methods for treating magnesium but none of them are a cure all. There are some issues with aluminum along these lines as well. An odor of rotten eggs (hydrogen sulfide) is an indication of such reaction occurring, but the remedies are different. Water used in aluminum bearing comps can be treated with boric acid to stop such reactions. Edited September 25, 2015 by rogeryermaw 1
schroedinger Posted September 25, 2015 Posted September 25, 2015 Oxalates are a product from a strong base and a weak acid. The result is a salt which still has ph higher then 7. Mg js attacked in both acid and alkali enviroments. 1
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