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Analysis of Pickling Solution of Galvanized Sheet
1. Principle: Use the principle of acid-base neutralization to form salt and water to determine free acid, use methyl red as an indicator, sodium hydroxide as a standard neutralizer, and use potassium tritide to mask the interference of iron ions.
2. Reagents used: mixed indicator, Chengdu galvanized steel pipe factory, galvanized steel plate, hot Chengdu galvanized steel pipe, hot Chengdu galvanized steel pipe, galvanized coil, galvanized iron sheet, Chengdu galvanized steel pipe price, 1mol hydrogen of tinplate Sodium oxide standard solution, 5% potassium fluoride solution, add mixed indicator a little, and dilute with hydrochloric acid 1mol sodium hydroxide solution to light green. Analytical method: Pipette 5-10ml of pickling solution, place it in a 100ml conical flask, add 15ml of potassium fluoride solution, add a few drops of mixed indicator, and titrate to light green with 1mol / L sodium hydroxide standard solution as the endpoint.
3. Determination of zinc ions: Principles After the reaction between permanganate ions and ferrous ions, Chengdu Galvanized Steel Pipe Factory, Galvanized Steel Sheet produced by galvanized corrugated steel sheet manufacturers, Hot Chengdu Galvanized Steel Pipe, Hot Chengdu Galvanized Steel Pipe, Galvanized Coil, Galvanized Iron Sheet, Chengdu Price of galvanized steel pipe, tinplate manganese becomes divalent manganese ion, iron is oxidized to trivalent iron using reagent: sulfuric acid 1 + 4, 0.02mol potassium permanganate standard solution.
Operation method: Pipette 10mL of pickling solution into 250mL conical flask, Chengdu Galvanized Steel Pipe Factory, Galvanized Steel Plate, Hot Chengdu Galvanized Steel Pipe, Hot Chengdu Galvanized Steel Pipe, Galvanized Coil, Galvanized Iron, Chengdu galvanized steel pipe price, add tin water 100mL, sulfuric acid 10mL, titration with standard 0.02mol potassium permanganate solution to the reddish 30s does not fade like the endpoint.