User:Alicia Rasines Mazo/Notebook/CHEM-582 Experimental Chemistry II/2015/04/08

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Tasks for April 8

  • To prepare an epoxy/10% TiO2 coating for adhesive test and corrosion potential test
  • To begin corrosion potential measurements

Epoxy/10% TiO2 coating

  • 0.85359 g of TiO2 were used
  • 3.34919 g of JA-400
  • 6.76336 g of epoxy

Gently stirred at 65°C for 15 min and then coated onto desired materials

Measuring electrode potential of Cu in copper sulfate solution

  • 100 mL of 0.1 M CuSO4.5H2O will be used.
    • (0.1mol/L)×(0.1 L)(249.6850 g/mol)=2.49685 g of CuSO4.5H2O needed in 100 mL
  • Sand copper electrodes and wash with concentrated HNO3 under the hood
  • Place Cu electrode and Ag/AgCl in copper sulfate solution and measure voltage. Note: single junction electrodes were used.
    • Copper electrode 1: 73.1-72.8-72.7-72.6
    • Copper electrode 2: 78.0-77.6-77.2-76.6-76.3-73.3-72.9-72.6
  • Both copper electrodes stabilized at a voltage of 72.6 versus the AG/AgCl reference electrode in a 0.1 M solution of CuSO4
  • both electrodes will be coated with epoxy to see how the voltage differs