Galvaniskt element zink koppar ammoniumklorid Zinc ammonium chloride is the inorganic compound with the formula (NH 4) 2 ZnCl 4. It is the ammonium salt of tetrachlorozincate. It used as a flux in the process of hot-dip galvanizing. Uses. Steel to be galvanized passes through an acidic cleaning process to remove iron oxide "mill scale". After this process, the surface of the steel is very. 1 vad innebär elektrolys 2 History In , Luigi Galvani discovered that when two different metals (e.g., copper and zinc) are in contact and then both are touched at the same time to two different parts of a muscle of a frog leg, to close the circuit, the frog's leg contracts. [3] He called this "animal electricity". 3 galvanisk cell 4 Aluminum is difficult to maintain in the zinc bath because it floats on the zinc so it is usually added as brightener bar and plunged under the surface of the zinc to mix well. Bismuth When bismuth is added to the galvanizing kettle it increases the fluidity of the zinc, which helps prevent bridged holes, clogged threads, and runs in the zinc. 5 A zinc electrode and a copper electrode are placed in a beaker containing an aqueous solution of zinc sulfate, ammonium citrate, and ammonium chloride. The electrodes are connected to a DC power supply and a voltage is applied - the negative lead on the copper electrode and the positive lead on the zinc electrode. 6 Reaktionerna som sker i ett galvaniskt element (cell) kan beskrivas med ett cellschema-Zn (s) Zn2+ (aq) Cu2+ (aq) Cu (s) + ü Ett galvaniskt element (galvanisk cell) består av två ”halvceller”: Den ena halvcellen är där oxidation sker (anoden) och den andra halvcellen är där reduktion sker (katoden). De två strecken i mitten. 7 cellschema 8 Galvaniskt element = två olika metaller som sänks ner i en jonlösning. 9 hur fungerar galvaniskt element? 10 Galvaniska Element - 12