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P13656 Week 6 - SDII Update

P13656 Week 6 - SDII Update. Meeting Agenda. Variable Testing Discuss results Possible future steps Corrosion & Resistance Testing Results and possible influence on the project Cleaning Unit Update Future Steps. Variable Testing. Performed at different starting temperatures

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P13656 Week 6 - SDII Update

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  1. P13656 Week 6 - SDII Update

  2. Meeting Agenda • Variable Testing • Discuss results • Possible future steps • Corrosion & Resistance Testing • Results and possible influence on the project • Cleaning Unit Update • Future Steps

  3. Variable Testing • Performed at different starting temperatures • Samples were submerged for 1.5-6 hours • Used CTI hydrogen peroxide solution • Coating removal was visible

  4. Variable Testing Testing Schedule

  5. Variable Testing Testing Data

  6. Visible Results • Increased time in ultrasonic unit decreased amount of coloration • As temperature increased, rate of stripping increased slightly

  7. Increase in Temp Increase in Time

  8. Conductivity Testing • Measured conductivity of peroxide solution from variable testing • Test results obtained • Colorimetry and correlations of base values for check

  9. Conductivity Testing

  10. Conductivity Summary • Correlation between visual results and conductivity results • Colorimetry also expected to support these results • Next steps • Solution lifetime/optimal replacement period • Potential use of conductivity to standardize solution replacement

  11. Corrosion Testing • Used weight loss method • Measuring mass change in stainless steel wire samples • AWG 18 - 316L and 430 SS wire • 6 hour exposure period • Varied conditions and solutions

  12. Corrosion Test Condition Methodology Still bath (20 C) filled with: • H2O - Control • H2O2 - Baseline effect of hydrogen peroxide Sonic bath (50 C) filled with: • H2O - Control • H2O2 - Typical operation • H2O2 + Cl (PVC shavings) - Worst case

  13. T = 50 C T = 20 C

  14. Significance of Corrosion Testing Results • Protection of tank integrity and estimation of tank lifetime • Direct vs. indirect stripping methods • Calculation of tank lifetime when used with certain solutions • Protection of the base metal of the product • Limit uncoated exposure time in ultrasonics • Chlorides (PVC shavings) may have greater effect over longer time frame • Recommend using HCl for future testing

  15. Ultrasonic Unit • Unit has been set up in the test area and is working properly • Heater control located on tank

  16. Function Generation Unit • Power selection • Timer • Sweep function varies power • Overrides unit's onboard controls (excepting heat) • User manual is on EDGE: https://edge.rit.edu/edge/P13656/public/Phase_II_Documents/Pete/SC%20Operator's%20Guide.pdf

  17. Future Steps • Prepare detailed instruction manual for the cleaner • Process conditions and optimization • Test samples in the full-sized unit (use more realistic samples if available) • Technical paper and poster for Imagine RIT

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