Question

2) Bimetallic Corrosion [10 marks] A piece of pure zinc with a surface area of 10 cm2 is connected to a piece of platinum in 0.1 M HCL. The metals are connected through an ammeter that reads 5 mA. The zinc was corroding at a rate of 0.1 mA/cm2 before it was connected to the platinum. Based on the given information, can we accurately determine the corrosion rate of the zinc in mm/year)? If yes, calculate the accurate corrosion rate; if no, give your best approximated estimation. The density of zinc is 7140 kg/mu.

A piece of pure zinc with a surface area of 10 cm2 is connected to a piece of platinum in 0.1 M HCl. The metals are connected through an ammeter that reads 5 mA. The zinc was corroding at a rate of 0.1 mA/cm2 before it was connected to the platinum. Based on the given information, can we accurately determine the corrosion rate of the zinc (in mm/year)? If yes, calculate the accurate corrosion rate; if no, give your best approximated estimation. The density of zinc is 7140 kg/m3

Answer 1

zn zn²t the cussent is produced because of oxidation faraday law WE Zxixt Zx zteleccrochemical - equivalent інияхеме t time wo mass of element thicknessa An area, w= density x volume =dx Axa dxAxa - zx1 3 for an a= 65 x 19.500 s e e n hoe ontgi nyo tone = 2.36x1040 m/s. A ay = 2036x10-10 x 1000 mm x 60X 60X24 - X3651 1 year = 7.44 mm/year.