P13656Week 6 - SDII Update

Meeting Agenda• Variable Testing

o Discuss resultso Possible future steps

• Corrosion & Resistance Testingo Results and possible influence on the project

• Cleaning Unit Update

• Future Steps

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 Testing• Testing Schedule

Variable Testing• Testing Data

http://youtube.com/v/np5Erqss1qQ

Visible Results• Increased time in

ultrasonic unit decreased amount of coloration

• As temperature increased, rate of stripping increased slightly

Increase in Temp

Increase in Time

Conductivity Testing• Measured

conductivity of peroxide solution from variable testing

• Test results obtained

• Colorimetry and correlations of base values for check

Conductivity Testing

Conductivity Summary• Correlation between visual results and

conductivity resultso Colorimetry also expected to support these results

• Next stepso Solution lifetime/optimal replacement period

• Potential use of conductivity to standardize solution replacement

Corrosion Testing• Used weight loss

method

• Measuring mass change in stainless steel wire sampleso AWG 18 - 316L and

430 SS wireo 6 hour exposure

periodo Varied conditions

and solutions

Corrosion Test Condition MethodologyStill 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

T = 20 C

T = 50 C

Significance of Corrosion Testing Results• Protection of tank integrity and estimation of

tank lifetimeo Direct vs. indirect stripping methodso Calculation of tank lifetime when used with certain

solutions

• Protection of the base metal of the producto Limit uncoated exposure time in ultrasonics

• Chlorides (PVC shavings) may have greater effect over longer time frameo Recommend using HCl for future testing

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

working properly• Heater control located on tank

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• 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