P13656 week 6 sdii update
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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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P13656 week 6 sdii update

P13656

Week 6 - SDII Update


Meeting agenda

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

Variable Testing

  • Performed at different starting temperatures

  • Samples were submerged for 1.5-6 hours

  • Used CTI hydrogen peroxide solution

  • Coating removal was visible


Variable testing1

Variable Testing

Testing Schedule


Variable testing2

Variable Testing

Testing Data


Visible results

Visible Results

  • Increased time in ultrasonic unit decreased amount of coloration

  • As temperature increased, rate of stripping increased slightly


P13656 week 6 sdii update

Increase in Temp

Increase in Time


Conductivity testing

Conductivity Testing

  • Measured conductivity of peroxide solution from variable testing

  • Test results obtained

  • Colorimetry and correlations of base values for check


Conductivity testing1

Conductivity Testing


Conductivity summary

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


Corrosion testing

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


Corrosion test condition methodology

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


P13656 week 6 sdii update

T = 50 C

T = 20 C


Significance of corrosion testing results

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


Ultrasonic unit

Ultrasonic Unit

  • Unit has been set up in the test area and is working properly

  • Heater control located on tank


Function generation unit

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


Future steps

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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